More room, seamlessly joined.

Additions & Expansions

More room, seamlessly joined.

Additions & Expansions

When you love your home but need more of it, a well-designed addition is the answer. The trick is making new space feel original — and that's exactly what design-build does best.

Additions & Expansions

A great addition disappears. The rooflines match, the trim lines up, the new space flows naturally from the old — and from the street, no one can tell where the house ends and the addition begins. Tidemark designs and builds primary-suite additions, second stories, in-law and au-pair suites, garages, and bumpouts that expand your home without compromising its character. We manage the structural engineering, the tie-ins to existing systems, and the permitting, so the finished result is seamless inside and out.

Assess & Plan

We evaluate your home, lot, and foundation to determine the smartest way to add space — out, up, or both. We check setbacks, easements, and what the county and critical-area rules allow before a single line is drawn, so the design starts on solid ground. We match finishes inside and out so the transition between old and new disappears completely. A final walkthrough together confirms the addition feels like it was always part of the house.

Design to Match

We design the new space to read as original, carefully matching rooflines, trim, proportions, and finishes so nothing looks bolted on. The goal is an addition that no one — not even your neighbors — can spot from the street. We check setbacks, easements, and what the county and critical-area rules allow before a single line is drawn, so the design starts on solid ground. We match finishes inside and out so the transition between old and new disappears completely. A final walkthrough together confirms the addition feels like it was always part of the house.

We handle the structural engineering, the tie-ins to your existing framing and systems, and all permitting. Construction is sequenced to minimize disruption to the parts of your home you're still living in, with weekly updates throughout. We check setbacks, easements, and what the county and critical-area rules allow before a single line is drawn, so the design starts on solid ground. We match finishes inside and out so the transition between old and new disappears completely. A final walkthrough together confirms the addition feels like it was always part of the house.