Architecture across
Toronto, Ottawa & Gatineau.
Three cities across two provinces. One practice with deep roots in each. Choose your city to explore how we work there.
Toronto
Custom homes, additions, laneway suites, commercial, and multi-unit across the GTA. Deep knowledge of Toronto zoning, TLAB, and the permit process.
Ottawa
Residential renovations, custom homes, institutional and commercial projects across Ottawa. Our home studio, with 15+ years of work in the capital.
Gatineau
Custom homes, additions, and residential renovations across Gatineau and the Outaouais — design and permit work tuned to Quebec’s context, just across the river.
Featured Projects
Our Story
25:8 Architecture + Urban Design is a bespoke architectural studio based in Ottawa, Ontario, Canada, specializing in affordable residential design, institutional architecture, and civic planning solutions.
Book a Consultation
We
Build
Futures.
A practice rooted in modernism, pushing boundaries of form and function across cities and communities.
Discovery
Understanding your goals, challenges, and opportunities.
Strategy
Shaping a vision through research and design thinking.
Execution
Turning strategy into bold, effective solutions.
Designing Tomorrow Today: 25 Hours: 8 Days a Week
642 Somerset St W,
Ottawa, ON K1R 5K4
(613) 276-8258
info@258arch.com
