The Ellery ADU Studio Simi Valley Guarantee
We stand behind every ADU we design, permit, and build in Simi Valley with one simple rule: if it’s not done right, we make it right. Since 2015, we’ve delivered 900+ ADUs across Ventura County, and every single one started with a written price and ended with a documented photo record. In Simi Valley, that means your garage conversion in Wood Ranch or your new detached unit near Big Sky gets the same standard: drawings that match what gets built, permits that pass inspection the first time, and a crew that shows up when we say we will. No exceptions, no finger-pointing between designer and builder, and no invoice that surprises you.
What’s Covered
- Workmanship guarantee. Every structural connection, waterproofing detail, and finish surface is built to the permitted drawings; if it deviates, we correct it at our expense under the 365-Day Done Right Promise.
- Parts and material handling. We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie; if a brand-specified component arrives damaged or out of spec, we manage the replacement, not you.
- Site cleanup and protection. Your main residence, driveway, and landscaping are treated as part of the job; we leave the work zone broom-clean after every phase, documented in your photo record.
- On-time milestone arrival. Our crews are background-checked, uniformed, and scheduled with realistic lead times; if weather or permit delays shift the calendar, you hear from a live person, not a voicemail black hole.
- Honest, upfront pricing. Under Haven Standard Clause 1, every project carries a written price before any work starts; the words “call for a quote” do not appear anywhere in our process, because the quote is already written when you sign.
Our Satisfaction Promise
If something is not right, we fix it. That’s the entire 365-Day Done Right Promise, and it’s in writing before your project starts.
Here’s how it works in practice. During construction, you receive a documented photo record on every visit: what we found, what we did, and what the next step requires. These are timestamped images, not a summary of how the crew felt about the day. If the finished ADU doesn’t match the permitted drawings, if a finish detail is off, or if a system we installed isn’t performing as specified, you call (820) 444-6584. A live person answers, 24/7. No callback queue, no “we’ll get back to you tomorrow.”
We return to assess within the timeline we commit to on that call. If the issue falls under our workmanship or material specification, we correct it at no additional charge. The scope was locked at signing under Haven Standard Clause 5 (No Surprises), so there are no door-side upsells and no scope creep to complicate the fix. We’ve operated this way since 2015 because it’s the only way that makes sense for a project that lives on your property for decades. An ADU in Simi Valley isn’t a quick flip; it’s a long-term addition to your home’s value and your family’s flexibility. We build and guarantee it accordingly.
Licensed & Insured Backing
Licensing and insurance are the floor, not the ceiling, but they’re the floor you should verify before you sign with any ADU builder in Simi Valley. Ellery ADU Studio is state-licensed and carries insurance and bonding that covers the full scope of design-build work: architectural drawings, structural engineering, site preparation, utility connections, and finished construction. That matters because ADUs in Simi Valley trigger multiple inspection disciplines, foundation work near existing structures, and electrical and plumbing tie-ins that cross property lines. A designer who isn’t licensed for construction can’t be held accountable for buildability. A builder without proper coverage leaves you exposed if something goes wrong on your property.
We publish our license number on every page because it’s verifiable, not just claimed. Our crews are background-checked and uniformed, and their work is backed by the same policy that covers the design team. One contract covers everything, so if a setback variance calculation in the permit set doesn’t match what the city inspector sees in the field, there’s no designer pointing at the builder or vice versa. We handle it. That’s the practical meaning of licensed and insured backing in a design-build studio: one point of accountability, documented in writing, from first sketch to final certificate of occupancy.
How the Haven Standard Protects Your Simi Valley Project
The Haven Standard isn’t marketing language. It’s a set of clauses that governs every project we take on, and three of them matter most for your guarantee.
Clause 1: Written Price Before Any Work Starts. Your quote is line-itemed, fixed, and signed before a shovel hits the ground. In Simi Valley, where garage conversion ADUs typically run $85,000-$165,000 all-in and new detached units range $180,000-$350,000 depending on utility distance and foundation conditions, that written price is your protection against the change orders that derail most ADU budgets.
Clause 5: No Surprises. The scope is locked at signing. If we encounter an existing condition we couldn’t reasonably foresee, we document it with photos, explain the impact, and quote the adjustment in writing before proceeding. No verbal “while we’re here” additions. No pressure to decide on the spot.
Clause 7: Documented Photo Record. Every visit produces images you receive: the existing slab measurement, the rebar placement before the pour, the waterproofing detail at the roof-wall intersection. These are your evidence, not our internal notes. They matter for resale, for insurance, and for the day you wonder whether something was done correctly.
Free Second Opinion: Your Estimate, Our Eyes
If you already have a written estimate from another Simi Valley ADU builder, we’ll review it at no charge. We’ll tell you what’s clear, what’s vague, and what’s missing. We’ve seen estimates that omit utility trenching, that assume a slab is adequate without testing it, or that price a “turnkey” project without mentioning permit fees. Our second opinion is free because informed homeowners make better clients, and better clients get better outcomes.
What “Done Right” Means for Prefab and Modular ADUs
Ellery ADU Studio specifies and coordinates prefab and modular systems from eight brands: Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie. Our guarantee applies to these projects too. We don’t drop a unit on your foundation and disappear. We manage the site prep, the crane placement, the utility tie-ins, and the finish work that turns a delivered module into a permitted, occupied ADU. If the manufacturer’s spec doesn’t match your Simi Valley lot conditions, we catch it in design, not during installation. The 365-Day Done Right Promise covers our coordination and finish work; manufacturer warranties cover their components, and we help you navigate both without passing you between phone trees.
Call Nadia Ellery Directly
Questions about what our guarantee covers on your specific Simi Valley lot? Call (820) 444-6584. A live person answers, any time. Or schedule your free estimate with a written price before any work starts.
Written by Nadia Ellery, Owner at Ellery ADU Studio Simi Valley, serving Simi Valley since 2015.