The Ellery ADU Studio Lancaster Guarantee
We stand behind every ADU we design, permit, and build in Lancaster with one simple rule: if it’s not done right, we make it right. That’s not a tagline - it’s the 365-Day Done Right Promise, and it’s in your contract before we break ground. For Lancaster homeowners adding a garage conversion in Quartz Hill or a detached unit near the Antelope Valley Country Club, this means your finished ADU matches the permitted drawings, passes final inspection, and functions the way we said it would. If something’s off, we fix it. No dispute, no delay, no extra invoice. Since 2015, we’ve delivered 900+ ADUs across California with a written price locked at signing and a documented photo record of every visit. The guarantee is only as good as the company behind it. We’re still here, still building, still honoring our word.
What’s Covered
- Workmanship to the permitted drawings. Every wall, window, and utility connection is built to match the approved permit set - not “close enough,” not “that’s how the field crew interpreted it.” If the finished ADU deviates from what Lancaster Planning and Building Safety signed off on, we rebuild it correctly under the 365-Day Done Right Promise.
- Parts and materials, specified and tracked. We name the manufacturer and model in your written scope - James Hardie siding, a Tuff Shed shell, a Dvele modular system - so there’s no substitution without your signature. If a part fails because we installed it wrong, that’s on us. If the manufacturer has a defect, we handle the warranty claim and coordinate replacement.
- Site cleanup, every phase. Our crews leave your Lancaster property broom-clean after demolition, rough-in, and final walkthrough. No abandoned rebar in the backyard, no drywall mud tracked through your main house. The photo record shows before, during, and after - you’ll see the difference.
- On-time milestone arrival. We don’t promise impossible schedules - Lancaster’s Planning Department has real turnaround times, and Antelope Valley’s freeze-thaw cycle affects concrete pours. What we do promise is showing up when we said we would for every scheduled visit. If we’re delayed, you’ll know before you have to ask.
- Honest pricing with zero scope creep. Under Haven Standard Clause 1, your written price is locked before any work starts. No door-side upsells, no “we found an issue” add-ons that weren’t in the original scope. The only way the price changes is if you change the design - and that requires a signed change order with a new written price.
Our Satisfaction Promise
If you’re not satisfied with the finished ADU, we don’t debate whose fault it is - we fix it. Here’s how the make-it-right process works. First, you call (661) 528-5298 and speak to a live person. No voicemail queue, no callback that never comes. Second, we schedule a walkthrough within 48 hours, usually faster. Third, we identify the gap between what you received and what your contract specifies. Fourth, we execute the correction with the same crew or specialist who understands your project. Fifth, we document the fix with photos and your sign-off. The 365-Day Done Right Promise covers anything built to the permitted drawings that doesn’t perform as intended - a window that leaks in a Lancaster windstorm, a floor that slopes because the slab wasn’t leveled, a mini-split that short-cycles because the load calc was off. We don’t disappear after final inspection. Nadia Ellery has operated this studio since 2015, and our reputation in Lancaster depends on the last project being as clean as the first. The guarantee is in writing because handshake warranties aren’t worth the paper they’re not printed on.
Licensed & Insured Backing
A guarantee is only as solid as the company that can afford to honor it. Ellery ADU Studio Lancaster is licensed and insured, which means we’ve met California’s contractor qualification standards and carry the coverage to protect your property and our crew while we’re on site. For Lancaster homeowners, this matters in practical terms: if a worker is injured during your garage conversion, you’re not liable. If we damage your existing home’s sewer lateral during utility trenching, our policy handles it. If a subcontractor walks off the job, we’re still on the hook - not you. The license is verified, not just claimed, and the insurance is current. We don’t treat this as a box to check. It’s the real guarantee behind the 365-Day Done Right Promise, because a company that can’t absorb the cost of a mistake can’t afford to make it right. When you hire us for an ADU in Lancaster, you’re hiring a design-build studio that has survived two housing cycles, 900+ projects, and the specific headaches of Antelope Valley’s high-desert building conditions. That staying power is your ultimate protection.
The Haven Standard: Your Contractual Rights
Every Ellery ADU Studio Lancaster project runs under The Haven Standard - five clauses that govern how we work and what you can demand. These aren’t marketing points; they’re in your contract.
Clause 1: Written Price Before Any Work Starts. You’ll never see “call for a quote” on our site or in our office. The price is itemized, printed, and signed before demolition or foundation. If we underestimated the concrete needed for your Lancaster lot’s caliche layer, that’s our margin problem, not your change order.
Clause 2: Documented Photo Record on Every Visit. Our crews photograph what they found and what they did. You receive the images, not a summary of how it felt. “The existing garage slab is 4 inches with no rebar; here’s what that means for your foundation line item” - that’s the level of detail you get.
Clause 3: 365-Day Done Right Promise. If the finished ADU isn’t built to the permitted drawings, we make it right. In writing. Before the project starts. No expiration negotiation, no “normal wear and tear” escape clause.
Clause 4: Free Second Opinion. Already have a written estimate from another Lancaster ADU builder? Bring it in. We’ll review the scope, the pricing, and the permit strategy - no charge, no obligation.
Clause 5: No Surprises. The scope is locked at signing. No door-side upsells, no “while we’re here” additions. The only path to a higher price is a change order you initiate and sign.
What the Guarantee Means for Your Lancaster ADU Project
Lancaster’s ADU market has specific pressures that make a real guarantee essential. The city’s 2023 zoning updates expanded where detached ADUs can go, but Antelope Valley’s high winds and temperature swings punish shortcuts in framing, insulation, and HVAC sizing. A garage conversion near Avenue K faces different soil conditions than a new detached unit in the western foothills. We’ve built in both, and our guarantee accounts for both.
Our prefab and modular fluency - Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, James Hardie - means we can specify systems that match your budget and your lot, then stand behind the integration. The Haven Standard applies whether we’re pouring a custom foundation or coordinating a crane-set modular unit. One contract, one written price, one party responsible.
The 900+ ADUs in our portfolio include Lancaster projects where the make-it-right clause was never triggered - and a few where it was. We’re not perfect. We’re accountable. The difference is whether the company is still around to fix what went wrong. Nadia Ellery has been here since 2015, and the studio’s phone rings through to a live person at (661) 528-5298, any hour.
Common Questions About Our Guarantee
Does the 365-Day Done Right Promise cover manufacturer defects?
No - manufacturer defects fall to the product warranty from Abodu, Cover, Dvele, or whichever brand we specified. We handle the claim and coordinate replacement, but the cost is between us and the manufacturer. What the Done Right Promise covers is our installation: if we mounted the unit wrong, sealed a window poorly, or sized the electrical subpanel incorrectly, we fix it at our expense.
Call (661) 528-5298 to schedule your free estimate - estimates are free, and the written price comes before any work starts.
What if I find an issue after 365 days?
Structural and systems issues that emerge later typically trace to manufacturer warranties or maintenance items. We’ll diagnose the cause honestly - if it’s our workmanship, we’ll discuss fair resolution even past the formal period. If it’s normal aging or deferred maintenance, we’ll tell you that too, and quote the repair at our standard rate with no pressure.
Call (661) 528-5298 for an honest assessment - we’re not interested in charging for work that isn’t ours to own.
How do I verify your license and insurance?
Ask us. We’ll provide the license number and certificate of insurance on request, and it appears on every page of our project documentation. We don’t expect trust - we expect verification. Any Lancaster contractor who hesitates to show credentials is telling you something.
Call (661) 528-5298 and we’ll send documentation before you sign anything.
Does the guarantee apply to prefab and modular ADUs?
Yes. The Haven Standard governs our design-build contract regardless of construction method. For prefab and modular systems, our guarantee covers site prep, foundation, utility tie-ins, and finish integration - the parts we execute on your Lancaster lot. The manufacturer’s warranty covers the module itself. We coordinate both so you’re not caught between a shell supplier and a local contractor pointing at each other.
Call (661) 528-5298 to discuss which construction method fits your lot and budget - the guarantee applies either way.
What’s not covered?
Damage from owner modifications after final inspection, normal wear and tear, and issues caused by failure to maintain systems (changing HVAC filters, clearing drains, etc.). Also, changes you request after signing - those require a change order with a new written price under Clause 1. We’re transparent about boundaries because a guarantee with hidden exclusions is worse than no guarantee at all.
Call (661) 528-5298 to review the full contract language - no surprises means you see the exclusions upfront.
Written by Nadia Ellery, Owner at Ellery ADU Studio Lancaster, serving Lancaster since 2015.