California Changed the Rules

Architect. Permits. Build. Financing.One Company.

Stop juggling three companies. We draw the plans, pull the permits, build your backyard home, and help you find financing — all under one fixed price.

No obligation. No hard sell. Just a clear path forward.

  • Licensed
  • Bonded
  • Insured
  • CSLB #1150085
  • In-House Architect
  • Permits Handled
  • Financing Available
  • Serving San Mateo & Santa Clara

Most homeowners juggle three companies — architect, permit expediter, builder — who point fingers when it goes sideways.

With us, it's all one.

Architect

In-house architect draws your plans to your lot and budget.

Permits

We pull the permits, handle city submissions, and track the 60-day clock.

Build

Licensed, bonded, insured GC. One team, one schedule, craftsmanship built to stay.

Financing

You don't need all the cash up front. Find out what you qualify for.

California law is on your side — we handle the rest.

The 60-day clock

Once the city receives a COMPLETE application, state law requires them to act within 60 days. We prepare complete applications so the clock works for you.

Reduced fees for smaller ADUs

ADUs under 750 sq ft may qualify for exemption from certain impact fees.

No replacement parking

Under state law, cities generally can't require replacement off-street parking for an ADU.

State grants may be available

Ask us if you qualify.

Rules vary by city and change over time. We guide you through your city's current requirements.

Financing

You don't need all the cash up front.

Financing up to $200,000 · APR from 7.99% · soft credit check that won't affect your score.

  • 60-second application
  • Soft credit check — won't affect your score
  • Terms from 1 to 12 years
  • Funds in 1–5 business days

Financing provided by third-party lenders through Enhancify, not by CoGeneral Construction Inc. Subject to lender approval. APR from 7.99%.

What we build

Detached and Attached ADUs.

Attached ADU

An addition to your home — shares a wall, separate entrance, fully independent living.

Detached ADU

A standalone home in your backyard — maximum privacy and rental value.

Completed Bay Area ADU exteriorBay Area ADU built by CoGeneralCoGeneral Construction jobsite
  • Licensed, Bonded & Insured — CSLB B #1150085
  • Permits Handled End-to-End
  • Fixed Written Contract — No Change Orders
  • Serving San Mateo & Santa Clara Counties
The Lean-Machine Difference

The price we quote is the price you pay.

No change orders, no surprise bills. We cut the company overhead — showrooms, sales floors — not the crew. Your money goes to the work.

Free walkthrough

Tell us about your project. We'll do the rest.

Answer a few quick questions and we'll put together a clear, no-pressure plan for your backyard home — architect, permits, build, and financing under one roof.

  • Fixed price, no change orders
  • Licensed, bonded, insured (CSLB #1150085)
  • Financing options available

Get My Free Estimate

Takes under a minute. We'll call within the hour.

Step 1 of 520%

What type of ADU are you planning?

CoGeneral Construction Inc.
San Mateo & Santa Clara Counties + San Francisco Peninsula
CSLB B License #1150085 · Bonded & Insured
© 2026 CoGeneral Construction Inc. All rights reserved.