This fast-read guide reveals the must-know design rules that cut schedules, prevent rework, and keep modular projects 30% on time and on budget.

Evan Gould, VP Design, Stack Modular

These 7 tips are the framework our team uses on every Stack project - from healthcare and hospitality to residential and workforce housing.
✅ The shaft spacing rule that saves weeks
✅ Why a 25mm gap prevents rework
✅ Where NOT to run services
✅ When to go site-built vs modular
Every developer looking at modular wants faster schedules, cost certainty, less risk. At Stack, we've seen too many projects lose millions because basic design rules were ignored.
This guide is about that early stage. The part that decides everything. It gives you the same rules Stack Modular uses to deliver projects up to 30% faster, with budgets that hold from design through install, across 14+ countries and every sector from housing to healthcare.
These aren’t “nice-to-know” tips. They’re the difference between a modular project that succeed and and one that cost more, take longer, and face preventable rework.

Evan Gould is the Vice President of Design at Stack Modular. After graduating with a degree in Architecture at Lehigh University, he started his working on high-end, custom residential projects throughout the West Coast and Hawaii. After a period in the commercial real estate brokerage industry, he moved to Shanghai, China in 2010 to head project initiatives in the newly founded company, Stack Modular.
As the company Director and later the head of all design, his work experience spans several continents and ranges from award-winning, luxury resorts to remote living accommodations, oil & gas projects to prisons. He also manages an in-house team of designers, drafters, and engineers, as well as outside consultants.