An ADU (Accessory Dwelling Unit) is a secondary home on your lot — detached, attached, garage conversion, or JADU. zHeight delivers ADU design, permit-ready plans, and full Title 24 CF1R compliance, end to end.
Trusted ADU design and permit specialists serving California and homeowners across the USA.
In the Bay Area, where space is limited and property values keep rising, a thoughtfully designed ADU can do more than add square footage — it can reshape how you live, earn, and plan for the future.
300+
Design & Permit Projects
52+
Jurisdictions Served
35+
ADUs Delivered
100%
Permit Approval Rate
Every lot is unique. We design ADUs that adapt to your property's constraints — from narrow driveways to hillside grades.
A fully independent backyard home with its own kitchen, bathroom, and private entrance—ideal for rental income or multigenerational living.
An ADU built as an addition to your home that shares one or more walls, offering a cost-effective way to expand living space.
A fully permitted living unit created by converting an existing garage—typically the most affordable way to add usable space and rental potential.
A compact unit (up to 500 sq ft) built within your home's existing footprint, providing a fast, budget-friendly housing option.
Building an ADU isn't about paperwork — it's about trust, timing, and communication. We keep your project organized, compliant, and on schedule.
We evaluate your lot, zoning, and setbacks to determine the best ADU strategy for your property.
Our team creates optimized floor plans that maximize light, privacy, and livable space within code requirements.
We prepare and submit all required plans — building plans, structural, and Title 24 — and coordinate with city reviewers.
After your permit is issued, we answer your contractor's plan questions and handle any permit revisions or city inspection follow-ups.
$7,999*
Flat fee · No hidden costs · Bay Area Permit Expert
Includes building plans, structural set, Title 24 CF1R, and online city submission
* Terms and conditions apply
From Alameda County to Union City — we've navigated local ADU zoning, setbacks, and plan check processes across 52+ cities.
Alameda County | Belmont | Burlingame | Castro Valley | Daly City | Dublin | Foster City | Fremont | Gilroy | Hayward | Los Altos | Menlo Park | Millbrae | Milpitas | Mountain View | Newark | Oakland | Palo Alto | Pleasanton | Redwood City | Richmond | San Carlos | San Jose | San Mateo | San Ramon | Santa Clara | Sunnyvale | Union City
From design to city permits, we keep the process simple. Let's create a space that adds real value to your home.