Decoding Timber Towers is the fourth competition presented by Urbanarium to encourage dialogue and design investigations to promote housing affordability and address the effects of climate change. Entrants are asked to consider design solutions for mass timber residential and mixed-use buildings that, as with the earlier Missing Middle, Mixing Middle, and Decoding Density competitions, also explore how housing innovations and higher densities are constrained by building code, zoning, and other regulations.

This competition explores the challenges facing designers, builders, and developers in replacing concrete residential high-rise buildings with an industry-wide approach to deliver low carbon buildings more competitively, while maintaining a high standard of comfort, sociability, and connection to land. It highlights a systems-thinking approach to optimize the use of BC timber, prefab and modular buildings in the 8 to 20+ storey range.

Compete in Decoding Timber Towers. $50,000 in cash prizes! Competition results will be shared widely through videos, a publication, a press campaign, various websites, Urbanarium Studio workshops and Woodrise 2025, a global congress on mid and high-rise timber construction and buildings coming to Vancouver in September. 
 

DOWNLOAD THE BRIEF 

The Jury

Andrew Lawrence

Structural Engineer | Arup Fellow, Director
@
Arup

Andrew is Arup’s global timber expert based in the UK. He is the Arup Fellow, Royal Academy of Engineering Visiting Professor at Cambridge University, member of the European Timber Design Code Committee and judge for the UK Wood Awards. He has helped engineer some of the most challenging timber structures in the world.

Andrew Lawrence Jury Headshot

Brenda Knights

Housing Developer | CEO
@
BC Indigenous Housing Society

Brenda is a leader in housing, sustainability, mass timber construction and Indigenous empowerment. Her transformative efforts have provided safe, affordable, and culturally resonant housing for communities across BC. She is a member of the Kwantlen Nation and serves on the boards of Canada Lands, Legal Aid BC, and the New Relationship Trust as a Federal and Provincial appointee.

Brenda Knights Headshot

Emilie Adin

Planner | President
@
Planning Institute of British Columbia

Emily is an Adjunct Professor at the UBC School of Community and Regional Planning. She is the past Director, Climate Action, Planning and Development at the City of New Westminster and was named one of the 500 most influential leaders in British Columbia by BIV Magazine in 2023.

Emilie Adin Headshot

Ian Boyle

Structural Engineer | Principal
@
Fast + Epp

Ian has played a key role contributing to multiple landmark mass timber projects around the world. As a North American leader in timber structures he has been instrumental in advancing mass timber innovation, balancing structural efficiency with design intent.

Ian Boyle Headshot

Dr. Gary Hack

Planner | Professor Emeritus
@
UPenn, MIT

Gary is professor and dean emeritus of the School of Design at the University of Pennsylvania and emeritus professor of urban design at MIT. He is the author of Site Planning: International Practice and many other books and articles. Earlier in his career he served as managing director of CMHC’s design and development group focusing on innovative affordable housing.

Gary Hack Headshot

Mingyuk Chen

Architect, AIBC | Associate Director
@
LWPAC

Mingyuk is an expert in mass timber architecture and prefabrication, specializing in the seamless integration of design and manufacturing. Mingyuk is driven by a passion for innovation, sustainable building systems, and advancing the future of productized prefabricated housing.

Mingyuk Chen Headshot

Natalie Telewiak

Architect AIBC, AIA | Principal
@
MGA | Michael Green Architecture

With an education in both architecture and engineering, Natalie’s approach to design is rooted in material logic, collaboration, and connection. With over 15 years working with mass timber, she leads and inspires her team to deliver elegant solutions that marry structure, systems, manufacturing, and architecture.

Natalie Telewiak Headshot

Norm Leech

Community Leader | Executive Director
@
Frog Hollow Neighbourhood House

Norm is an elder, facilitator, past Chief and Administrator for T’it’q’et, St’at’imc Nation and an urban Indigenous housing and decolonizing expert. He is the President of the DTES Community Land Trust, Co-chair of the Metro Vancouver Aboriginal Executive Council, President of the Aboriginal Front Door Society and was the former Director of the Vancouver Aboriginal Community Policing Centre.

Norm Leech Headshot

Richard Henriquez

Retired Architect, AIBC | Founding Principal
@
Henriquez Partners Architecture

Richard is a recipient of the Order of Canada and an RAIC Gold Medal; he is internationally recognized for his award-winning, iconic buildings, his sculptures and for his many years of community service including the Founding Chair of Urbanarium.

Richard Henriquez Headshot

Sailen Black

Architect, AIBC | Senior Green Building Planner, Planning, Urban Design and Sustainability
@
City of Vancouver

Sailen has been a part of the Green & Resilient Buildings team at the City of Vancouver for twenty years. His work includes creating incentives for mass timber, Passive House, and Net Zero energy buildings through policy, project review and advising staff, consultants, and applicants.

Sailen Black Headshot

Schedule

Early Bird Registration Opens*Monday, March 31, 2025
Site Allocations Begin**Monday, April 7, 2025
Early Bird Registration DeadlineTuesday April 14, 2025
Deadline for Questions Round 1***Thursday, April 10, 2025
Answers Posted Round 1Tuesday, April 15, 2025
Deadline for Questions Round 2Thursday, April 24, 2025
Answers Posted Round 2Tuesday, April 29, 2025
Registration DeadlineTuesday, May 6, 2025
Urbanarium City Debate: Is Mass Timber Worth the RisksMonday May 5, 2025
Deadline for Questions Round 3Thursday, May 8, 2025
Answers Posted Round 3Tuesday, May 13, 2025
Deadline for Questions Round 4Thursday June 12, 2025
Answers Posted Round 4Tuesday June 17, 2025
Submission DeadlineMonday, August 25, 2025
Jury DeliberationSaturday, September 6, 2025
Awards PresentationMonday, September 15, 2025
Woodrise Congress Winners ShowcaseSeptember 22-26, 2025
Party! Publication & Solutions VideoMonday, November 24, 2025

*Early bird registration will be open with a discounted fee of $95 CAD until Friday April 11. Standard registration fee is $140 per team, with a student rate of $55 per team (all members must be students). Registrants before Friday, April 11 at 11:59pm PST will receive their preferred site selection.

**The first wave of site packages will be distributed on or after Monday April 7, with subsequent packages being distributed on an ongoing basis.

***Question Rounds: Competitors have the opportunity to submit questions in three rounds. Answers to competitor questions will be posted online for all entrants. Additional questions rounds may be added if needed. 
 

Prize Money

Overall Prize Awards
     First Prize $15,000 CAD
     Second Prize $10,000 CAD
     Third Prize $5,000 CAD
     5 Honourable Mentions $2,000 CAD ea.
 
Digital Award
     Innovation in Systemization and Standardization Award $10,000 CAD

Competitor Questions Round 1

Are there coverage limits? Can I build a podium right to property line?

Submissions are not asked to comply with a specific zoning schedule, and in fact are encouraged to “ignore existing guidelines” if doing so unlocks some critical potential. However, it will be up to the entrant to provide a design rationale supporting the project’s “relationship to adjacent properties and streets.” Site coverage may also be considered from a stormwater management, urban vegetation, and livability perspective.

Any more detail on digital award?

The Digital award does not include specific criteria, nor is it looking for specific results. New digital technologies could be proposed to increase efficiencies in supply chains, transportation, labour, fabrication, etc. A successful proposal should demonstrate how it would harness these technologies in a way that can expand low carbon housing in new and meaningful ways. 

Affordability for purchase or rental?

Affordability can be interpreted a number of ways, and tenure type is part of this equation. The brief invites entrants to explore tenure as well as “legal mechanisms for ownership and financing” as part of their proposal, and innovation in this area will be considered as part of the judging criteria.

Competitor Questions Round 2

In 'Appendix C: Site C by Scared Waters Development' it states under the 'environmental considerations' that the site is heavily treed as well as being near a stream at the northern property line. Can you confirm where this stream is as the site map that was provided has no indication of it. Also from this map, is it to assume that the site to the north as well as the east has existing built context?

The “historical stream” means there was once a stream at this location, which was likely covered and/or rerouted as part of previous development in the area. It is mentioned here as an opportunity for applicants to potentially “daylight” part of the stream as part of rainwater management on site.
Both the North and East abutting sites include low rise buildings (3 stories) with yellow and red indicating residential and commercial building footprints, respectively. For the portion of the east existing building abutting the property line, assume a blank fire wall.
 

Is Plan North (up) oriented to True North on the PDF maps and CAD files? Are we free to interpret the direction of North in our response?

Please assume for all sites that True North is facing directly up on the page for PDF and CAD files.

In the base case: The cost/SF is less for below ground. Is this correct? Does it not include excavation cost?

This is correct. The parkade includes excavation, concrete structure and M&E for the parkade. The above grade levels include structure, envelope, finishes (cabinets, flooring, drywall, paint, appliances etc.) & M&E.

Competitor Questions Round 3

What are the units of the .dwg file?

Units of the .dwg are millimeters and it is scaled 1:1. If participants have trouble exporting into different software, they may consider a “use detected file units” option, if available. You can also scale the plan using the given site dimensions.

For Site D: Do we understand correctly from Appendix D that the project is meant to house the Tsawwassen First Nation or is an ethnic/population diversity still expected?

The Site D description acknowledges that it is on the ancestral territory of the Tsawwassen First Nation, and was never formally ceded. It is up to the participant to decide how this information is or is not incorporated into their proposal.

Can we exceed the TODA minimum maximum?

 TOA guidelines are provided as a framework for entries; however, as with any guideline or code, participants may choose to propose a different approach. Participants should provide a design rationale detailing how their proposal follows or ignores given guidelines for the site.

Would it be possible to submit 2 entries? ; Can I enter solutions for all the sites?

Entrants may submit only one entry for consideration. However, they are encouraged to demonstrate how their design solution for a specific site could be replicated in other contexts, which may include the additional design competition sites.

Do we need to specify the scenario(s) we've chosen somewhere on the 6-8.5x11 pages? That's space taken away.

The proposed development scenario can be incorporated into the project description, title, or design rationale.

Can you clarify whether if this competition is looking for ONE building design with a fixed number of stories and units per floor or a building system that can work for VARIOUS buildings ranging from 8-20 stories and density of unit?

Both. It is assumed that entries will describe in detail one project, composed of one or more buildings. Successful entries will demonstrate how this one example employs ideas / designs / methods that are highly efficient and repeatable, and therefore capable of influencing other projects and the industry as a whole.

Are there any detailed site plans available to show more site context? (showing any grade changes, property lines etc)

No. However, certain common land use patterns can be found across the lower mainland. Participants may find it useful to look at municipal GIS viewers to understand typical relationships of parcels to streets, lanes, sidewalks, and other public realm features.

What are some important plant and animal species in the region? What are their names, and are there other words or phrases or concepts in the First Nations dialects/traditions that we may wish to consider or highlight?

Participants are encouraged to do their own research regarding common site characteristics of the lower mainland region of BC, and to incorporate those into their proposals.

What are the seasonal or climatic considerations for the sites? Flood risk? Hurricanes? Are there special considerations during migration seasons, noise, light pollution, etc?

Participants are encouraged to do their own research regarding common site characteristics of the lower mainland region of BC, and to incorporate those into their proposals.

Do the sites slope, or is there evidence that they would have naturally prior to the existing buildings? Is there any information on soil types/foundation considerations?

Participants are encouraged to do their own research regarding common site characteristics of the lower mainland region of BC, and to incorporate those into their proposals.

Can we eliminate some bylaws?

Guidelines are provided as a framework for entries; however, as with any guideline or code, participants may choose to propose a different approach. Participants should provide a design rationale detailing how their proposal follows or ignores given guidelines for the site.

Competitor Questions Round 4

The prompt for Site C indicates the site is heavily treed, while the base map provided shows an urban arterial with full site coverage by a low rise commercial building. Which should we assume?

You may assume the site is fully developed with a low-rise commercial building as shown on the base map and treat the “heavily treed” description in the prompt as the pre-colonial condition.

Please provide further information on how entrants should calculate the cost per square foot for their proposal. Given the many variables involved, the variance between how different teams calculate this number will substantially exceed the variance between the cost of the actual design approaches. Is there a prescribed way we are to approach this calculation? How will normalization between teams occur?

Project cost is just one factor for consideration, and a number of guides and calculators have been provided to assist entrants in the calculation of costs. That said, the Urbanarium acknowledges that approaches will differ between teams, and direct comparison is a known challenge. For that reason, there are professional cost estimators included in the technical advisors that will be on hand during jury deliberation to “check the math” and advise the jury. We are interested in seeing how competitors arrived at their cost calculations; what sources they used, and what assumptions were made. Including this information in the proposal will help in the “normalization” between entries. 

For site C, the stream is mentioned as being on the adjacent site (i.e. not on Site C). However Q&A Round 2 mentions the stream as something that could be daylighted on our site in the 10m setback (“It is mentioned here as an opportunity for applicants to potentially “daylight” part of the stream as part of rainwater management on site.”). Please confirm whether the competition intent is to A) have us daylight the stream within the Site C 10m setback, or B) have us assume that the adjacent site has a daylig

The earlier Q&A response was directed toward a question that expressed interest in daylighting the stream, which Urbanarium supported. However, there is no requirement to do so, on or off of the site, and entrants should not assume a daylighted stream already exists. How entrants propose to respond to pre-colonial site conditions in their proposals is completely up to the entrant and should be supported in their design rationale.

A review of the Competition documentation finds that the documentation does not appear to indicate the precise municipal/local zoning (nor zoning district) applicable to any of the Sites. How are submissions to speak to the relationship to existing zoning/guidelines? Development Scenarios: Appendix C for Site C does refer to the "Surrey area" (Development Scenarios, PDF p. 4). Can/should City of Surrey zoning be assumed as applicable to Site C?

Some guidelines are provided by the TOA Policy Manual and BC Building Code. While other zoning regulations will differ by municipality, there are also many similarities in how zoning has guided this scale of development, particularly in the Lower Mainland. Entrants may find it useful to follow a particular municipal zoning bylaw as a reference point, but there is no expectation that entries will align exactly with any one specific set of municipal guidelines. The intent here is to explore the possibilities of what could govern TOA development, which will ultimately be dispersed across the province.

How in depth does the design need to be?

You can refer to the publication from last year's competition to see previous design submission for an idea of the level of depth required for winning submissions: https://urbanarium.org/sites/default/files/2024-06/Decoding%20Density%20Publication%20DIGITAL.pdf
You can also see all Decoding Density submissions at: https://acrobat.adobe.com/id/urn:aaid:sc:US:690af5c5-82b8-4f45-84cf-f0eb5d4bf3e0

Is there a minimum font size for the 6 submission pages?

There is no minimum font size. You submission may be included in the print publication, so please ensure the font will be legible if printed at scale. 

The 3 jpgs for promotional use - is this intended to just showcase our building or the project as a whole?

These images may be used in media coverage if your team is selected as a winner, or on social media. The images can be related to the project or project development - ie images of the project design, renderings, photos of the design process.

For the proforma spreadsheet, are we limited to editing the yellow boxes, or can we change the other numbers to allow for increased design flexibility for building components such as the balconies?

The base case provided provides a simple structure for cost comparison, and we invite you to modify other numbers as makes sense, with a clear explanation of your rationale included in your submission. We are interested in seeing how competitors arrived at their cost calculations; what sources they used, and what assumptions were made. (For example with balconies, your solution may drive down the cost of balconies, or not include balconies, and we are interested in how you would do so, or other solutions that would provide access to outdoor spaces etc). 

Under “Construction Costs” for submission, the unit prices are left blank and highlighted yellow. Does this mean participants should do their own research on the construction costs based on the construction methods proposed and provide cost estimates?

Yes, we expect entrants to develop their own construction costs for their submission based on their design choices. The competitor resources include a variety of calculators that may aid you in determining these costs. We are interested in seeing how competitors arrived at their cost calculations; what sources they used, and what assumptions were made.

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