Built to code. Built to last. No handoffs.
Trinity carries your ADU from permit filing through foundation, framing, and utility connections — one crew, one schedule, one point of contact.
This is a 40-year structure, not a shed
Every ADU Trinity builds carries dedicated plumbing, utility connections, and a poured foundation engineered to code — the same structural standards as the primary residence.
We own the concrete and framing trades in-house. That means the foundation crew and the framing crew are the same company — no markup layers, no version mismatches.
One scope. One schedule. Four phases.
01 — Site Visit
02 — Permit & Utilities
03 — Foundation & Frame
04 — Close & Inspect
Trinity files permits and coordinates utility connections directly — no separate permit expediter, no third-party utility contractor.
We walk every inspection with the building department, resolve punch-list items on-site, and hand you a permitted, livable unit.
We assess the lot, review zoning rules, and confirm setbacks before any drawing gets made. The site tells us what's possible.
Our in-house concrete crew pours the foundation; our framing crew follows on the same schedule — no gap, no re-mobilization cost.
Ready to talk site conditions and scope?
On-site estimates let us give you a real number — not a range pulled from a spreadsheet. Bring the lot, the zoning letter, the questions.