TOSA Prep School
Salt Lake City, UT
About the TOSA Prep School
TOSA Prep School serves as transitional and supportive housing for individuals moving out of homelessness and addiction as part of The Other Side Village model. Located in Salt Lake City’s historic district, the project required a multi-story solution that balanced durability, long-term performance, and neighborhood compatibility. The primary business need was clear: deliver safe, permanent housing quickly while managing cost exposure and minimizing prolonged site disruption in an urban environment.
ApproachIrontown delivered a 4-story, 33,860 SF modular apartment building consisting of 32 two-bedroom units plus shared gathering spaces. Modular construction allowed site work and building fabrication to proceed in parallel while shifting the most risk-prone work into a controlled factory environment. The design incorporated commercial-grade systems—including an elevator, cassette A/C, brick and Hardie exterior cladding, and storefront glazing—while exceeding acoustic performance standards through double-structure separation between units.
Key Outcomes:
- 12-month total delivery reduced carrying costs and accelerated occupancy.
- Short on-site duration minimized disruption in a dense historic district.
- Factory-built envelope eliminated weather exposure and jobsite quality risk.
- Enhanced acoustic separation exceeded sound transmission requirements.
- Commercial-grade systems supported long-term operational durability.
Main Problem solved
Problem
A multi-story housing project in a historic district faced schedule risk, prolonged site disruption, and quality exposure from weather-dependent construction.
Constraints
- Urban historic district with limited tolerance for long-term construction
- Multi-story residential program with commercial performance requirements
- Exposure to weather, vandalism, and theft during traditional site builds
- Need for accelerated occupancy to support program operations
What Modular Changed
- Enabled parallel factory manufacturing and site preparation
- Eliminated weather exposure during framing and interior buildout
- Reduced on-site duration to 7 months
- Delivered repeatable, controlled quality across all residential units
How We Delivered It
Irontown supported early feasibility and budgeting to align scope with funding and schedule targets. Design coordination addressed historic district requirements and commercial building systems. Modules were manufactured in a controlled factory environment with rigorous quality checks while site work proceeded in parallel. Delivery and set were completed in October 2025 using a coordinated crane plan, followed by efficient stitch work and closeout. Occupancy was achieved in January 2026.
Proof Notes
- 551 quality control points per module during factory construction
- Units were never exposed to rain, snow, or sun
- Double-structure assemblies exceeded acoustic performance requirements