ADU Specials in San Francisco, CA
If you’re comparing ADU builders in San Francisco, you’ll want to know what’s actually on offer before you pick up the phone. Call Sutton ADU San Francisco at (831) 272-7212 and we’ll walk you through current specials, then send a written price before any work starts. Every offer below is grounded in the same standard we’ve held since 2006: no surprise invoices, no scope creep passed silently to the bill.
Current Offers
Free Project Consultation and Written Estimate
Every San Francisco homeowner gets a free consultation and a written line-item price before any work begins. This covers the full scope: permits, site work, foundation, utilities, and the structure itself. You’re not calling an estimator who will pad the number later; you’re getting the number we intend to honor.
Valid through March 31, 2027. Mention this offer when you call (831) 272-7212.
365-Day Done Right Promise
Every completed build is covered by our written 365-Day Done Right Promise, which covers defects in workmanship for one full calendar year from project completion. If something isn’t right, Sutton makes it right, no haggling and no second invoice. This is not a verbal assurance; it’s a named guarantee stamped on every project we finish.
Valid through March 31, 2027. Mention this offer when you call (831) 272-7212.
Free Second Visit if Any Element Fails
If a repair or an element of your build fails within the first year, the follow-up visit is free. That includes the site visit, the diagnosis, and the fix under the terms of the Promise. We’d rather come back once than have you wonder whether the person who built it stands behind the people who work on it.
Valid through March 31, 2027. Mention this offer when you call (831) 272-7212.
New Customer Consideration
If you’re building your first ADU or room addition with us, ask about our first-time-customer courtesy on the initial consultation. It does not reduce the written price, and that’s the point: you get the honest number up front, and the courtesy applies to the consultation itself. Miles Hartwell, Owner, would rather have you know the real cost than bait you with a discount that disappears later.
Valid through March 31, 2027. Mention this offer when you call (831) 272-7212.
Referral Thanks
When a neighbor, friend, or tenant of yours builds with Sutton ADU San Francisco and mentions your name, we’ll send a thank-you your way once their written estimate is signed. There’s no cap on how many times you can do this. San Francisco lots are close together; a good referral is just the neighborly version of a site visit.
Valid through March 31, 2027. Mention this offer when you call (831) 272-7212.
How to Redeem
First, call (831) 272-7212 and mention the offer you saw. A live person answers every call, 24 hours a day, 7 days a week, so you won’t sit in a voicemail tree. Second, we’ll book a consultation and send you the name and photo of your technician before they arrive, per the Threshold Standard. Third, present the offer at the time of service, and we’ll apply it in writing before any work begins.
How Much Does an ADU Cost in San Francisco?
Most detached ADUs in San Francisco run $180,000 to $320,000 before site work, depending on lot conditions, foundation, and the product line you choose. A garage conversion to an ADU typically falls lower, and a room addition varies with square footage and whether you’re tying into existing plumbing. In neighborhoods like the Sunset, where lots are long and narrow, a setback (the required gap between your new structure and the property line) can shape the design and the price more than the square footage itself. In the Richmond, we regularly see soil conditions that affect foundation depth. These are the details a written estimate should nail down.
What Product Lines Does Sutton ADU San Francisco Work With?
We have experience with Abodu, Cover, Dvele, Mighty Buildings, Boxabl, and Plant Prefab, plus Tuff Shed conversions and James Hardie exterior systems. That matters because San Francisco’s planning process is not one-size-fits-all, and a prefab unit that slips through one neighborhood’s design review can stall in another’s. We’ll tell you honestly which product line fits your lot and budget, not which one we happen to have sitting in a warehouse.
Do You Pull the Permits?
Yes. We pull permits for every ADU, home addition, and room addition in San Francisco. We also handle the inspections. If you’ve heard horror stories about a builder who says “don’t worry about permits,” that’s your cue to worry. An unpermitted ADU can hold up a sale later and cost more to retrofit than the permit would have cost in the first place.
Will the Price Change Once Work Starts?
Not without your written sign-off. Every project begins with a written price, and any change order is a separate line item you approve before we proceed. That is the rule, not the exception. In our experience, the thing that actually changes a San Francisco ADU budget is discovering what’s under the soil or behind the stucco, and that’s something a proper site visit and written estimate should catch up front.
Who Is Sutton ADU San Francisco?
Sutton ADU San Francisco is the ADU-specialist member of the Threshold Group family, founded in 2006. The name Sutton comes from an old English term for a south farm, which feels right for the kind of settled, rooted decision you make when you add a second home to your own lot. Miles Hartwell owns this location, and every technician who arrives at your door is background-checked, identity-verified, uniformed, and photo-badged under the Threshold Standard. You’ll get their name and photo before they arrive, and they’ll show a photo ID badge at the door. Every time.
Call for Your Free Estimate
Building an ADU or room addition in San Francisco is a six-figure decision, and the worst thing we could do is rush you into it. Call (831) 272-7212 to schedule your free estimate. You’ll get a written price before any work starts, and a real person on the line when you call.
Written by Miles Hartwell, Owner at Sutton ADU San Francisco, serving San Francisco since 2006.
