ADU Specials in Rancho Cucamonga, CA
We run these offers year-round because Rancho Cucamonga homeowners deserve to know what an ADU project costs before anyone picks up a hammer. Call (909) 506-1121 to schedule your free estimate and mention any offer below. Every special pairs with our written-price guarantee under Haven Standard Clause 1, so the number you hear on the phone is the number on the contract.
Current Offers
Free Second Opinion on Any Written ADU Estimate
Already have a quote for your garage conversion or detached ADU from another Rancho Cucamonga contractor? We’ll review it line by line, check the scope against city code, and tell you what’s missing or inflated. No obligation, no pressure to switch. We’ve caught $8,000-$15,000 gaps in competitor quotes on Alta Loma and Etiwanda projects this year alone.
Valid through December 31, 2026. Mention this offer when you call (909) 506-1121.
365-Day Done Right Promise - Locked In Writing at Signing
Every new project in Rancho Cucamonga receives our Done Right Promise at no extra charge. If the finished ADU doesn’t match the permitted drawings, we make it right, period. This isn’t an extended warranty you buy later; it’s Haven Standard Clause 5, signed before work starts, backed by the same contract that covers your design, permitting, and build.
Valid through December 31, 2026. Mention this offer when you call (909) 506-1121.
Documented Photo Record Included on Every Visit
Most Rancho Cucamonga ADU builders hand you a progress report that says “framing looks good.” We deliver dated, geotagged photos of what we found and what we did, uploaded to your project folder before we leave the site. On a recent Day Creek project, this record caught a plumbing rough-in deviation that saved the homeowner a $3,200 drywall tear-out. Yours at no additional cost.
Valid through December 31, 2026. Mention this offer when you call (909) 506-1121.
Written Price Before Any Work Starts - Always, Guaranteed
Haven Standard Clause 1 means you’ll never see “call for a quote” on our site or hear it on our line. We itemize every line, from Rancho Cucamonga’s plan-check fees to your final inspection, and lock the total before the first shovel hits dirt. If the scope doesn’t change, the price doesn’t change. No surprises, no change orders, no door-side upsells.
Valid through December 31, 2026. Mention this offer when you call (909) 506-1121.
Live Person Answers 24/7 - No Voicemail, No Callback Roulette
Call (909) 506-1121 at 10 PM on a Tuesday or 6 AM on a Sunday; a real person picks up who can access your file, schedule your visit, or connect you to Nadia Ellery directly. This isn’t an answering service reading a script. Our after-hours team fields questions about setback variances, utility tie-in timelines, and whether your Victoria Gardens-area lot qualifies for a junior ADU.
Valid through December 31, 2026. Mention this offer when you call (909) 506-1121.
One-Contract Design-Build - No Designer-Builder Finger-Pointing
Book your Rancho Cucamonga ADU under our single-contract model and eliminate the gap between architect and contractor. Your designer, your permit runner, and your build crew all answer to the same scope, the same price, and the same Done Right Promise. We’ve seen too many North Fontana-adjacent projects stall because the designer specified a 9-foot ceiling and the builder framed for 8. That doesn’t happen here.
Valid through December 31, 2026. Mention this offer when you call (909) 506-1121.
How to Redeem
Step 1: Call (909) 506-1121 and mention the offer you want to apply to your Rancho Cucamonga ADU project.
Step 2: Book your free estimate visit. We’ll bring a checklist specific to your lot, your zoning, and your ADU type, whether that’s a garage conversion near Central Park or a new detached unit in the foothills.
Step 3: Present any written competitor estimate or mention the special again when we deliver your written quote. The terms lock into your contract at signing.
Every offer runs through December 31, 2026, and stacks with our standard Haven Standard protections. No fine print, no expiration pressure, no “act now” theatrics. Just honest value for Rancho Cucamonga homeowners who want an ADU built right the first time.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving Rancho Cucamonga since 2015.