Santa Clara & San Mateo County

See your ADU in your actual yard — before you spend a dollar on design.

Browse 500 plans on your property with plan-specific renders and construction budget ranges — then let HomeWiP's permit expertise carry your chosen design through your city's approval process.

No commitment. Just clarity on whether an ADU is right for your property.
Why HomeWiP

The real ADU danger isn't the build. It's the permit.

Most ADU projects stall because the designer didn't know the local jurisdiction's requirements. HomeWiP is built to close that gap.

Permit-first approach

We start with what your city actually allows — then design backward from approval, not toward rejection.

Plans that match your lot

500 plans filtered by your property's zoning, setbacks, and geometry. Not a catalog — a decision engine.

Real cost ranges

Every plan comes with a construction budget range so you can plan financially before you commit emotionally.

Built with HomeWiP

Real ADUs. Real yards. Real permits approved.

Every project here started as a backyard idea — and ended with an approved permit and a build-ready plan.

Modern studio ADU — 450 sq ft, San Jose
Two-bedroom cottage — 720 sq ft, Mountain View
Above-garage conversion — Sunnyvale
Detached ADU with rooftop deck — Palo Alto
Backyard guest house — 600 sq ft, Redwood City
How It Works

From backyard idea to approved permit — without the years of back-and-forth.

Browse plans on your lot

Enter your address and see which ADU designs are feasible on your specific property, complete with renders and cost ranges.

Pick a plan and scope it

Choose your favorite, customize finishes and layout, and get a detailed scope document ready for permits.

We handle the permit

HomeWiP navigates your city's planning, building, and utility requirements so you don't have to.

Build with confidence

Your approved permit and builder-ready documents let you get competitive bids and start construction.

What Makes Us Different

No one on commission. No one selling you the wrong plan.

Most ADU paths start with a designer, a referral network, or a builder who earns when you commit. HomeWiP is a platform — we earn when your permit is approved and you're ready to build.

  • Permit-first, not design-first
  • Plans pre-checked against local code
  • Transparent budget ranges, no surprises
  • Builder-ready documents on approval
  • Traditional path: 18+ months of guesswork
The Plan Library

Arrive at a specific vision before you commit to anything.

500 plans isn't a catalog. It's a decision engine. Filter by square footage, bedroom count, and construction budget range — then see exactly how each design sits on your lot.

  • Filter by size, bedrooms, and budget range
  • See plan-specific renders on your actual lot
  • Compare construction cost ranges side by side

Budget ranges are a planning starting point — pre-construction is what finds your real number.

For Builders

Stop doing pre-construction for free.

HomeWiP delivers build-ready clients — homeowners who arrive with an approved permit, a clear scope, and an educated understanding of the process. Your margin is in building, not in managing permit delays.

Become a HomeWiP builder
Approved permits Clear scope documents Educated homeowners No pre-con overhead

Most ADU projects stall in permitting. Yours doesn't have to.

Schedule a free planning call and walk away with clarity on whether an ADU is right for your property — and what it would take to get one approved.