Home Additions

Expand without moving.

Second-story additions, room expansions, and bump-outs that blend seamlessly with your existing home - backed by deep structural engineering.

What’s included

  • Second-story additions with foundation verification
  • Room additions - bedrooms, family rooms, home offices
  • Bump-outs and extensions (kitchen, bath, sunroom)
  • Master-suite additions with en-suite and walk-in closet
  • Load-bearing modifications, foundation, and seismic work

How we work

  • Structural capacity evaluated during the design phase
  • Designed in 3D before we build
  • Stay in your home where the addition allows
Most additions: 6-12 monthsSecond-story: 8-14 monthsInvestment: $250-$500/sq ft

Frequently asked questions

How much does Home Additions cost, and how long does it take?

Most additions: 6-12 months; Second-story: 8-14 months; Investment: $250-$500/sq ft. You get exact, itemized pricing during the design phase — before any commitment.

Do you handle design, 3D, and permits too?

Yes. UniqHaus is one studio handling architecture, interior design, 3D visualization, permitting, and construction — so design intent, budget, and permits never get lost in a handoff.

Which Bay Area cities do you serve?

We work across the Bay Area including San Jose, Palo Alto, Los Gatos, Saratoga, Sunnyvale, Cupertino, Mountain View, Campbell, Los Altos, Menlo Park and 60+ surrounding communities.

Ready to plan your Home Additions project?

Tell us your scope, timeline, and goals — we’ll point you toward the right next step.

Discuss Your Project