Introduction
Buildner, in collaboration with the City and County of Denver and AIA Colorado, is pleased to announce the winners of the Denver Affordable Housing Challenge, an international ideas competition exploring how affordability and design excellence can reinforce one another within the specific urban, social, and environmental context of Denver.
As the nineteenth edition in Buildner’s Affordable Housing Challenge series, the competition invited architects and designers from around the world to respond to Denver’s housing crisis through proposals operating at architectural, urban, and systemic scales. Rather than prescribing a single site or typology, the brief encouraged flexible strategies capable of addressing affordability, climate resilience, and community impact while contributing positively to Denver’s urban identity.
The winning projects reflect a wide range of approaches united by a shared ambition to elevate affordable housing beyond minimum compliance and toward long-term civic value. From carefully calibrated gentle-density infill and courtyard-based missing-middle housing, to ambitious modular frameworks that treat incremental growth as a form of urban repair, the awarded proposals demonstrate that affordability, adaptability, and architectural quality are not mutually exclusive.
Several winning entries engage directly with existing neighborhoods, transforming single-family lots and underutilized urban spaces into shared, community-oriented environments without erasing local character. Others operate at a broader urban scale, proposing expandable systems and 15-minute neighborhood frameworks that challenge conventional development models while remaining conceptually rigorous and visually precise. Together, the winners illustrate the range of architectural thinking required to address Denver’s housing challenges, from immediately deployable building strategies to long-term urban systems.
The competition concluded with a live public results announcement in Denver, attended by the Mayor of Denver and the CEO of AIA Colorado, underscoring the city’s commitment to advancing housing solutions that are affordable, socially inclusive, environmentally resilient, and architecturally ambitious.
Buildner congratulates all winners and participants for their contributions to this important dialogue and thanks the City and County of Denver, AIA Colorado, and the international jury for their leadership in championing design excellence in affordable housing.
Results Announced at Denver Housing Challenge Event
The results of the Denver Affordable Housing Challenge were officially announced at a public event in Denver, where leaders and stakeholders gathered to recognize the winning proposals. The announcement was made in the presence of Denver Mayor Mike Johnston, alongside representatives from the City of Denver, AIA Colorado, and Buildner.
[view all event photos]

We sincerely thank our jury panel
for their time and expertise
Lucy Begg
AIA, Thoughtbarn
United States
Troy Fosler
AIA, Koning Eizenberg Architecture
United States
Kendra Garrett
City and County of Denver
United States
Caeli Hill
City and County of Denver
United States
Gosia Kung
Denver Housing Authority
United States
Brenna Malaney
Office of Climate Action, Sustainability, and Resiliency, City and County of Denver
United States
Dean Maltz
AIA, Shigeru Ban Architects (SBA)
United States
Katie Swenson
AIA, MASS Design Group
United States
1st Prize Winner
X-MU-X
I enter design competitions because they force me to stretch the boundaries of my work. They often have to be undertaken quickly, which forces me to think and act with clarity and to work instinctively. Competitions also provide crucial peer review of my ideas and their communication. Where a traditional theoretical researcher can write a paper and have it peer reviewed, a design competition – especially one where the entrants cannot identify themselves – gets your ideas in front of international experts who are basing their opinions and judgements solely on the work put before them, and not on who has created it, where they’re from, or their motivations for entering the competition in the first instance. Competitions are crucial for demonstrating the deployability of my work outside my own city. There are very few such opportunities to get valued outside opinions and to demonstrate that an idea can scale.
Read full interviewJury feedback summary
This project proposes X‑MU‑X, a design-led zoning framework that enables incremental density within Denver’s historic single-family neighborhoods by working at the scale of the individual lot. Rather than introducing new building types or wholesale redevelopment, the proposal retrofits existing Queen Anne houses through modest additions, backyard dwellings, and shared amenities accessed primarily from alleys. Read more By reframing zoning as an architectural and spatial question, X‑MU‑X shifts regulatory logic from abstract metrics toward qualitative, context-sensitive design outcomes. The system allows multiple independently owned dwellings to coexist on a single parcel while preserving neighborhood character, leveraging Denver’s existing housing stock, local construction practices, and small-contractor capacity. The result is a bottom-up model for affordability that aligns policy, architecture, and lived experience without erasing historic fabric.
This project sets out clear objectives to increase density by converting existing single-family housing to multi-family housing. It does so in a thoughtful and seamless manner. The project addresses the need for creating smaller units in single family neighborhoods to house single residents and couples. The conversion of a single-family property to a triple-family property, by utilizing existing alleys as the primary access points, is central to the project’s success. The added bulk and modern details referencing the existing Queen Anne building fabric is a sensible approach that expresses modernity while contextualizing with the neighborhood.
Dean Maltz / Buildner guest jury
AIA, Shigeru Ban Architects (SBA), United States
A highly original, policy-forward, design-as-zoning proposal that reframes affordability at the scale of the lot, the street, and the historic district. This project is less a building and more a regulatory, cultural, and design framework—one of the most intellectually rigorous submissions in the competition. Rather than proposing new typologies from scratch, the scheme leverages Denver’s existing single-family housing stock, its “latent capacity,” and the city’s strong culture of small contractors. It intelligently merges architectural alterations, backyard infill, lot-splitting, and shared spaces into a new distributed density model. The argument is sharp, strategic, and unusually realistic about local politics, homeowner incentives, and neighborhood character. The architectural resolution is intentionally modest, but the strategy is powerful. Its weaknesses lie in the visual resolution of the architecture and the strength of the renderings. Nonetheless, this is one of the most important and implementable ideas in the competition.
Katie Swenson / Buildner guest jury
AIA, MASS Design Group, United States
It's a nice idea to incorporate additional dwelling units in existing historic context. Proposed additions may challenging to execute and therefore expensive.
Gosia Kung / Buildner guest jury
Denver Housing Authority, United States
I love that this proposal is very context sensitive, addresses historic neighborhoods specifically where change is seen as impossible and that it incorporates a proposed ownership model.
Caeli Hill / Buildner guest jury
City and County of Denver, United States
Thoughtful project for utilizing existing SF zoning to increase density.
Kendra Garrett / Buildner guest jury
City and County of Denver, United States
A distinctly Denver, forward-looking approach that honors historic craftsmanship and establishes a clear framework for small-scale development.
Troy Fosler / Buildner guest jury
AIA, Koning Eizenberg Architecture, United States
The project is incremental through one lens and really quite radical through another. I like that it really takes on the issue of labor and capacity, much more so than most of its peer entries. It makes the proposition that the multi-billion dollar remodelling industry can be put to work building multi-unit developments and that this effort could be homeowner-driven, with outcomes shaped by real living needs rather than speculative development.
Lucy Begg / Buildner guest jury
AIA, Thoughtbarn, United States
Buildner's commentary, recommendations and techniques review
Order your review here
The presentation excels in narrative clarity and conceptual rigor, clearly communicating a complex policy-driven idea through diagrams and comparative site plans. Diagrammatic drawings effectively illustrate before-and-after density scenarios and regulatory implications, though linework consistency and visual depth vary across sheets. Read more Color is used sparingly and logically to differentiate existing and proposed conditions, yet the restrained palette occasionally limits emphasis on key architectural moves. Layouts are methodical but text-heavy, reducing immediate legibility and weakening visual hierarchy. While annotation supports the argument well, stronger integration between text and drawings would improve spatial comprehension. Overall, the boards prioritize intellectual precision over visual impact, reinforcing the project’s strength as a regulatory and strategic framework, while leaving room for greater architectural resolution and experiential depiction.
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6.5/10 Quality of overall presentation

Enter an open architecture competition now
2nd Prize Winner +
Buildner Sustainability Award
Buildner Sustainability Award
reFRAME
We use competitions as a way to collaborate, explore new ideas, and push our skills. They let us step outside constraints of everyday work, experiment freely, and simply have fun creating with friends.
Read full interviewJury feedback summary
reFRAME proposes a six-unit housing prototype that reframes the conventional single-family lot as a shared, courtyard-oriented living environment. Set within Denver’s established residential fabric, the project organizes two-and-three-bedroom units around a central communal garden, balancing gentle density with a familiar domestic scale. Read more The massing strategy carefully preserves neighborhood character while introducing shared outdoor spaces, individual patios, and clear unit identities through separate entries. Architecturally, the project emphasizes sustainability and long-term livability through CLT and glulam construction, passive climate strategies, photovoltaic integration, water management, and low-water native planting.
A thoughtful, well-resolved proposal that reimagines the single-family lot with care. The courtyard massing fosters community while staying compatible with its neighborhood, supported by clear sustainability strategies and strong small-footprint livability. Its limitation is scale: it delivers an excellent architectural solution but offers less in terms of policy, financial, or replicable frameworks to address Denver’s broader crisis. Affordability is implied but not defined. Still, it’s a compelling gentle-density infill project with strong design clarity and community focus.
Katie Swenson / Buildner guest jury
AIA, MASS Design Group, United States
This project gets high marks for sustainability. The glulam and CLT are nice use of material to create long span for open spaces. It also affords for prefabrication and building efficiency. The metal roof and cement fiberboard are good choices for fire resistance. The passive strategies for cooling, photovoltaics, water management for irrigation, and plantings contribute to a thoughtful sustainable approach. The plantings at grade and terrace add to biodiversity while water mitigation adds to flood resilience. A detail, but needs mentioning, is the effectiveness of the shading device on a building’s north side.
Dean Maltz / Buildner guest jury
AIA, Shigeru Ban Architects (SBA), United States
Really great submission with a lot of sustainable features. I appreciated that the design considered renewables, rainwater collection and low-water vegetation and also incorporated continuous insulation with CLT construction. This type of design is attentive to the local Denver climate. The only item I would consider adjusting is more roof overhang for shading in the summer. I also appreciated the balance of common space to share while also offering some privacy for the different units. This offers a good balance of collective and personal ownership.
Brenna Malaney / Buildner guest jury
Office of Climate Action, Sustainability, and Resiliency, City and County of Denver, United States
This project fits nicely to the scale of the existing context, while at the same time is new and innovative. Creating six residences out of what are two existing residences creates greater efficiency and addresses the need for housing. Separate entries give a sense of individuality and privacy. Each unit has their own outdoor space. It is a bit unfortunate that the largest unit shares a terrace and has the smallest outdoor space. I would have thought with the large front and rear yards there could have been some solution to create a third private outdoor space. Even with areas for improvement, this project is extremely well done.
Dean Maltz / Buildner guest jury
AIA, Shigeru Ban Architects (SBA), United States
I really like how this project proposes modular approach to missing middle housing. I appreciate the elegant proportions and materiality that is sensitive to Denver context of historic neighborhoods. I have a little concern about how the shared outdoor spaces will be addressed in fee-simple ownership structure that is preferred, because of maintenance responsibilities.
Gosia Kung / Buildner guest jury
Denver Housing Authority, United States
The climate-friendly reimagined cottage housing type. I like the use of passive house principles and water conservation.
Kendra Garrett / Buildner guest jury
City and County of Denver, United States
The village concept counters traditional development models that separate communities by need. Communal gardens between units build social resilience, while patios, screens, and native landscaping offer opportunities for personalization and privacy. Drawing on familiar patterns and textures, the approach integrates seamlessly into any Denver neighborhood.
Troy Fosler / Buildner guest jury
AIA, Koning Eizenberg Architecture, United States
Re-Frame appears familiar and unassuming in its scale and form but is in fact an ingenious realisation of a six-plex of two-and-three bedroom homes, totalling almost 6,000 square feet of space, on a typical single-family lot. The proposal manages to achieve an impressive amount within its limited boundaries, including an inviting massing and scale, convincing shared and individual outdoor spaces, adequate parking and logical circulation to each unit. There seemed to be a general fetishising of CLT amongst the entries as a construction methodology that would offer cost economies. This was one of them. This proposal would almost certainly be more affordable as a conventional stick frame system, and its layout and spans would lend itself well to being realised in this way. Overall a beautifully realised prototype for integrating sixplexes into single family neighborhoods in Denver and beyond.
Lucy Begg / Buildner guest jury
AIA, Thoughtbarn, United States
Buildner's commentary, recommendations and techniques review
Order your review here
The presentation demonstrates a high level of graphic discipline and architectural clarity, with consistent linework and carefully controlled drawing weights that clearly distinguish structure, enclosure, and landscape. Section perspectives and exploded axonometric diagrams are particularly effective, revealing spatial relationships, construction logic, and environmental strategies without overloading the boards. Read more The layout is confident and readable, moving logically from concept to unit organization and material assembly, though moments of hierarchy could be sharpened to better foreground affordability and replicability claims. The color palette is restrained and contextual, reinforcing material intent and neighborhood sensitivity, but occasionally softens differentiation between unit types and shared versus private space. Renderings are calm and credible, emphasizing lived-in scale and daylight rather than spectacle, though they underplay spatial atmosphere in some interior views. Overall, the boards communicate a coherent, buildable project with strong graphic control, prioritizing architectural resolution and sustainability over speculative or policy-driven narratives.
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3rd Prize Winner
Alley Town La Alma
This is Radix Design’s first architectural competition. As a small firm, we don’t typically have enough surplus time or budget to support what it takes to produce a quality entry. However, this competition was so close to home, and so immediately related to the things we are passionate about in our everyday work, that we felt it was worthwhile to commit ourselves to a deeply challenging month of developing the competition entry while still keeping the business going.
Read full interviewJury feedback summary
This project proposes Alley Town La Alma, a housing framework that reimagines Denver’s alley network as the basis for incremental, anti-displacement urbanism. Working within the existing scale and fabric of the La Alma neighborhood, the proposal introduces a modular rowhouse typology aligned along the alley, allowing multiple families to co-inhabit formerly single-family lots. Read more Rather than replacing homes, the scheme retains historic structures while adding units and shared amenities in the rear, transforming the alley from a service corridor into a lived and social space. The architectural approach emphasizes affordability through modular design, permit-ready construction, and IRC code use, while policy tools such as shared equity models and streamlined permitting support access and community stability. At once strategic and site-specific, the project offers a replicable model for sustainable infill rooted in cultural preservation and spatial dignity.
Alley Town La Alma addresses the potential of the alley-facing ADU typology but achieves a higher level of innovation compared to its peer entries. It does this by demonstrating the affordability gains that could be achieved by modestly adjusting the zoning codes that regulate ADUs to allow for a rowhome typology. The big idea is communicated strongly through all the diagrams, text and 3d views. In addition to demonstrating what could be gained by addressing zoning regulations such as setbacks and maximum floor area, the proposal is compelling in its arguments for affordability through preservation of existing homes, policy tools such as permit ready plans and use of the IRC rather than IBC. The actual building designs as shown in the 3d views was less inspiring than the diagrammatic content but overall the proposal should be recognised for its critical and innovative framework.
Lucy Begg / Buildner guest jury
AIA, Thoughtbarn, United States
The scheme proposes smart revisions to Denver’s zoning code.
Troy Fosler / Buildner guest jury
AIA, Koning Eizenberg Architecture, United States
I love this concept. Great understanding of existing community and history. Excellent use of space. Since ADUs house family members (not just renters), this is great for intergenerational housing. There were several ADU projects but the design of this one allowed for more engagement between neighbors. Looked like a neighborhood vs an ADU in someone's backyard.
Kendra Garrett / Buildner guest jury
City and County of Denver, United States
Very grounded in reality. Great approach to equity and avoiding displacement. The project is thought out from a large scale (placemaking) to a minute scale (wall assembly). Sustainability is not pushed very far.
Caeli Hill / Buildner guest jury
City and County of Denver, United States
I really like this proposal. I like the idea of utilizing the alley. I also really appreciate the mix of unit types and modular approach to urban infill. I have some concerns about how these units will fit in a historic context of the neighborhood. Both the community and the Landmark Commission may find the building forms to be inconsistent with the historic context and scale.
Gosia Kung / Buildner guest jury
Denver Housing Authority, United States
A standout proposal that transforms Denver’s alleys into a powerful, incremental housing network rooted in cultural preservation and anti-displacement. By introducing a new alley-oriented housing form, the project delivers density without demolition and respects the historic character of La Alma’s Chicano community. The strategy is highly feasible, deeply contextual, and adaptable across the city. Its only limitation is the modest architectural experimentation, but the urban and social clarity more than make up for it. A precise, community-grounded model with real potential for implementation.
Katie Swenson / Buildner guest jury
AIA, MASS Design Group, United States
Buildner's commentary, recommendations and techniques review
Order your review here
The presentation is graphically mature and intellectually precise, combining clear zoning logic with sensitive urban storytelling. Diagram sets are especially strong, offering exceptional visual legibility and well-paced sequences from block strategy to construction detail. The unit planning overlays and axonometrics are carefully aligned, allowing viewers to grasp typology transformation at a glance. Read more Annotation is thorough, well-scaled, and contextually placed, guiding the eye without crowding the boards. The color palette is subtle but effective: cool tones distinguish program and circulation with restraint, though slightly bolder differentiation of unit types in some views would improve modular legibility. The weakest element is the rendering style, which flattens the architectural massing and misses an opportunity to evoke spatial atmosphere or material presence. Yet overall, the boards offer a compelling, realistic proposal supported by architectural and graphic clarity at multiple scales.
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Buildner Student Award
Can Denver afford us ?
My primary motivation is to bridge the gap between academic theory and professional reality. While university education has provided me with a strong conceptual foundation, I believe that true growth comes from navigating the constraints and complexities of real-world problems. Participating in this competition is an opportunity for me to step out of my academic comfort zone, challenge my problem-solving skills against tangible constraints, and gain the practical insights that are essential for my future career as an architect. More importantly, I want to move beyond 'paper architecture' to create solutions that are not only visually compelling but also structurally viable and contextually responsive. This competition challenges me to consider the lifecycle of the building, material efficiency, and the actual user experience—elements that are often idealized in a purely academic setting.
Read full interviewJury feedback summary
This proposal advances a new vision for Denver’s future housing by framing incremental modular construction as a form of urban repair. Rather than operating at the scale of a single site, the project establishes a repeatable, expandable system capable of occupying residual urban land, spanning infrastructure, and stitching together fragmented neighborhoods. Read more Modular unit cells aggregate into larger residential clusters connected by elevated walkways, shared amenities, and civic programs, aligning with the principles of the 15-minute city and net-zero operation. The scheme positions adaptability as its core strength, allowing housing, services, and public space to evolve over time in response to social, economic, and environmental pressures. While speculative in scale and execution, the project integrates urban strategy, architectural systems, and socioeconomic intent into a coherent framework aimed at affordability, density, and long-term resilience.
Interesting concept. The practical aspect of assembling and dis-assembling of the building blocks may be challenging.
Gosia Kung / Buildner guest jury
Denver Housing Authority, United States
I really appreciate the emphasis on utilizing the sparse amount of land Denver has available. I like the idea of modules can be added in perpetuity. No information on sustainability.
Caeli Hill / Buildner guest jury
City and County of Denver, United States
This is one of the most ambitious, conceptually rich, and fully thought-through entries in the pool. It stands out for its clarity of idea (incremental modular housing as urban repair), its sophisticated graphic language, its systemic thinking, and its integration of urban, architectural, and socioeconomic reasoning. The proposal tackles affordability, adaptability, and climate resilience in a coherent way. The scheme feels speculative but grounded, and its representation—particularly the axonometric masterplan and section—is exceptional. Its weaknesses: the architectural expression can read as visually repetitive; feasibility of the elevated walkways and extensive modular bridges requires more rigorous structural and financial justification. But in terms of originality, systems thinking, and rigor, this is a top-tier submission.
Katie Swenson / Buildner guest jury
AIA, MASS Design Group, United States
I feel like this design is very flexible but it gets lost without a coherent story. Also, it lacks character that other designs did well. It feels like just putting housing and amenities on the ground versus creating a home.
Kendra Garrett / Buildner guest jury
City and County of Denver, United States
Buildner's commentary, recommendations and techniques review
Order your review here
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9/10 Linework

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8/10 Balance of color

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8/10 Layout

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Honorable mentions
Re-Ground: Toward a Regenerative Housing Typology
Architecture competitions provide a space to explore ideas without the constraints of conventional practice. They encourage us to move beyond the immediate demands of professional projects and to address design issues at broader, even global scales. Competitions offer opportunities for rigorous experimentation, collaboration, and growth, allowing us to develop visionary approaches while remaining engaged with the critical debates and responsibilities that define the field of architecture.
Read full interviewThe Missing Middle
We participate in architecture competitions for the thrill of it. Even if the odds of winning are slim, it’s a great experience to give something your whole attention and engage the whole process of envisioning a piece of architecture. This is something that can become quite rare or difficult to achieve in professional practice. The arena of the competition lets you tune out the noise of the world.
Read full interviewAlleyway Commons
As designers, we conjure up many different ideas throughout the day. Architecture competitions serve as proving grounds and a platform to test these ideas and sharpen our design sensibility.
Read full interviewCommon Spaces
We participate in competitions only if the parameters and scope of the competition align with an area of ongoing inquiry or interest in the office. In an ideal scenario, the competition work helps us to build expertise that we can leverage with other projects. We are generally only interested in competition briefs that are grounded in reality. In this instance, the Denver Affordable Housing Competition offered the opportunity to address an important real-world issue.
Read full interviewParked Grounds
We try to approach architecture with responsibility and with an optimism that comes from seeing how small changes can matter. Adjustments such as reusing material, reshaping a surface, or improving a shared threshold can influence how people experience their environment. When these changes accumulate, they can help cities move toward futures that are more resilient and more equitable.
Read full interviewShortlisted projects
Beyond Rooflines
Seoul National University of Science and Technology, SEOULTECH
+22 points Buildner University Rankings!
South Korea Restructuring Ownership: Leasehold Models for Denver Missing Middle
Broadway Station Housing - Affordable Housing in Denver, Colorado
Evolving House
Alley Town La Alma
SUPERBLOCK TO LIFE
University of Pennsylvania
+22 points Buildner University Rankings!
United States re forged
Université Laval School of Architecture, École d'architecture de l'Université Laval
+22 points Buildner University Rankings!
Canada Front Back and Stacked Duplexes
Sharing the Square: Reimagining a Denver Classic
Can Denver afford us ?
Ho Chi Minh City Architecture University
+72 points Buildner University Rankings!
Vietnam BRIDGING THE CANVAS
GSAPP, Columbia University Graduate School of Architecture
+22 points Buildner University Rankings!
United States
Promoted projects
It Takes A Courtyard To Grow A Neighborhood
We see architecture competitions as opportunities to test ideas beyond the limits of daily practice. They allow us to explore social and environmental questions freely, to speculate on new housing models, and to engage in a global dialogue about design and responsibility. Competitions are not only a platform for recognition but also a way to refine our collective voice — turning research and imagination into proposals that can inspire real change in the built environment.
Read full interview









The graphic work is confident and highly controlled, with crisp linework and disciplined axonometric drawing that clearly communicates system logic across scales. Read more The masterplan axonometric and perspective section are standout elements, effectively conveying density, circulation, and programmatic layering within a complex urban framework. Diagrammatic clarity is particularly strong, allowing viewers to understand modular growth, aggregation, and infrastructural integration at a glance. However, the narrative hierarchy is less consistent across boards, with multiple parallel arguments competing for attention and diluting the central storyline. Annotation and text occasionally lag behind the sophistication of the drawings, leaving key issues such as sustainability performance, structural feasibility, and phasing underexplained. The architectural expression, while systematic, risks visual monotony, reinforcing the need for greater differentiation at the human and domestic scale.