ADU Specials in Orange County, CA
Call Sutton ADU Orange County at (350) 209-9049 to ask which current offer fits your project. We run a small set of honest, useful specials throughout the year, not rotating gimmicks. Most Orange County homeowners are trying to figure out whether an ADU pencils out on their lot, so our offers are built around the two things that matter most: a real written number before you commit, and workmanship that stays fixed on our dime if anything falls short under the 365-Day Done Right Promise.
Current Offers

Free Site Assessment and Written Estimate
Every ADU, room addition, or home addition project starts with a free site assessment at your Orange County property. We walk the lot with you, talk through setbacks, access, and what your specific city will want to see on the plans, then we put a written price in your hands before any work begins. That price is the price; no billing surprises later. Homeowners in Anaheim, Fullerton, Santa Ana, Irvine, and the surrounding Orange County cities qualify. Valid through March 31, 2027. Mention this offer when you call (350) 209-9049.
Free Second Visit If Any Element of the Build Fails
This one isn’t a limited-time coupon; it’s standing brand policy on every project we complete. If a repair or element of the build fails within the covered period, Sutton ADU Orange County returns for a second visit at no charge, no haggling, no fee. The 365-Day Done Right Promise covers defects in workmanship for one full calendar year from project completion, in writing. Homeowners with any Sutton-built ADU or addition in Orange County qualify. Valid through March 31, 2027. Mention this offer when you call (350) 209-9049.
Prefab and Modular ADU Brand Consultation at No Charge
If you’re deciding between Abodu, Cover, Dvele, Mighty Buildings, Boxabl, or Plant Prefab, that decision is worth getting right the first time. We’ll walk you through which product line actually fits your Orange County lot, your access constraints, and your budget, plus how each pairs with James Hardie exterior systems where that makes sense. We work with all these systems, so the guidance is grounded in build experience, not a catalog. Homeowners researching detached ADUs anywhere in Orange County qualify. Valid through March 31, 2027. Mention this offer when you call (350) 209-9049.
First-Time ADU Client Consultation for Homeowners Still in the Planning Stage
If you’re eighteen months out from pulling permits and just trying to understand whether an ADU is legal on your parcel, call us. This sit-down covers what your Orange County city will require, what a realistic all-in budget looks like for your size range, and which construction path (prefab vs. site-built) is likely cheaper on your lot. You’ll leave with a working plan even if you never build with us. Homeowners in any Orange County city qualify. Valid through March 31, 2027. Mention this offer when you call (350) 209-9049.
Spring Project-Planning Courtesy for Orange County Teachers and First Responders
We set aside extra plan-review time each spring for teachers, nurses, firefighters, and law enforcement who are trying to add a home to an existing lot. The courtesy is the same written estimate everyone gets, but we prioritize getting your plans reviewed and your number back to you quickly so you can decide before summer construction season fills calendars. Orange County public school teachers and first responders with valid ID qualify. Valid through March 31, 2027. Mention this offer when you call (350) 209-9049.
How to Redeem
Three steps, none of which involve a form, a code, or an app.
- Call (350) 209-9049 and mention the offer. A live person answers every call, 24 hours a day, 7 days a week. Tell us which special you’re calling about and roughly what you’re planning to build.
- Book the site visit. We’ll schedule a time that works for you. Before anyone walks your property, you’ll get the name and photo of the technician coming out, so you know who’s at your door.
- Confirm the offer at the visit. When we arrive, mention the special again so we have it on the record. Your written price follows, and the 365-Day Done Right Promise applies to every project we complete.
What Orange County Homeowners Should Know Before Calling

Most detached ADUs in the 400 to 800 square foot range run between $180,000 and $320,000 before site work, and site work varies a lot from one lot to the next. A sloped parcel in Tustin or a tight backyard in Costa Mesa will carry different grading, access, and utility costs than a flat, open yard in Lake Forest. The written estimate you get from us accounts for your actual site, not a hypothetical one.
Permit timelines in Orange County also vary by city. Some local plan checkers move ADU applications through in a matter of weeks; others want multiple rounds of revisions. We handle the permit package, but we’ll tell you honestly what your specific city tends to do, because surprises at the counter are expensive surprises later.
The name Sutton comes from an old English word for a south farm, a settled place that was meant to stay. Adding a second home to your lot in Orange County is exactly that kind of rooted decision, and it should come with a written price, a verified crew, and a guarantee that doesn’t disappear after handshake day. That’s the Threshold Standard on every project, no exceptions.
Written by Miles Hartwell, Owner at Sutton ADU Orange County, serving Orange County since 2006.


