A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Glendale
Adding an ADU in Glendale costs roughly $180,000 to $420,000 for a detached unit, and the city’s own local amendments to state ADU law mean your parking and hillside review requirements will differ from what your friends in Burbank or Pasadena faced. We’re Benson ADU Builders, and we work in Glendale neighborhoods from Rossmoyne to the Verdugo foothills every week. Our ADU Builders team handles design, permitting, and construction without handing you a verbal estimate that drifts. Call (903) 568-7222 and you’ll get a written price before any work starts.
Most Glendale homeowners we meet have already heard horror stories about permit delays and change orders. Our job is to give you the real numbers up front: what the city will require, what your lot will cost to build on, and how long it actually takes. We’ve walked plan check at the Glendale municipal building enough times to know which comments will come back on a hillside lot versus a flatland infill site. That local knowledge changes the price you hear on day one.
Why Benson ADU Builders Is Glendale’s Preferred ADU Builders Company
We show up with a written scope before you commit. That’s the single biggest reason Glendale homeowners choose us over contractors who hand over a one-page estimate and disappear for three weeks. Every project we take gets a line-item price, a fixed schedule, and a 365-Day Done Right Promise stamped on the contract. If something isn’t right within a full year, we make it right. No phone tag, no endless voicemail loops. A live person answers our phones around the clock, every day of the year.
Our technicians arrive in uniform, background-checked, and you’ll know exactly who is walking onto your property. For Glendale specifically, we understand the city’s separate fire, seismic, and hillside review fees that most out-of-area contractors don’t quote until plan check hits. We build with brands you can research independently, including Abodu, Cover, and James Hardie cladding. You’re never locked into a single take-it-or-leave-it product.
Troy Eastman leads our team with a simple rule: the price we write is the price we build to. We’re part of the Relay Home Co. family, founded in 2006. Each location is independently owned and operated under The Relay Visibility Guarantee, which means a written price, real-time tracking, and a written guarantee on every project.
ADU Design in Glendale
ADU Design in Glendale means working the city’s local code amendments into your floor plan before you spend a dollar on construction. A good design phase costs $8,000 to $25,000 depending on whether you’re customizing a site-built unit or adapting a prefab floor plan, and it should include a permit set, structural drawings, and title-24 energy calculations. We start by mapping your lot’s setbacks, checking the half-mile transit-distance parking rule, and flagging any hillside triggers early enough to avoid costly redesigns mid-permit.
Parking Compliance Built Into the Plan
Glendale requires most new detached ADUs to provide on-site covered parking unless your lot sits within a half-mile of a transit stop. That’s a local amendment, and it surprises homeowners who assumed Burbank’s rules applied. We verify your transit proximity in the first week of design, not during plan check.
Slope and Drainage Review
If your property sits in the Verdugo foothills or along canyon edges, your design must account for slope-drainage and geotechnical review. We coordinate with geotechnical engineers and include retaining-wall details in the same permit set. Skipping this step is the most expensive mistake we see on Glendale hillside projects.
Backyard ADU in Glendale
A Backyard ADU in Glendale typically runs $220 to $380 per square foot all-in, so a 500 sq ft one-bedroom unit lands between $110,000 and $190,000, while a 1,000 sq ft two-bedroom pushes toward $300,000 and up depending on finish level and site work. We build detached ADUs, junior ADUs, studio units, and prefab installations. Our process starts with a site visit, a soils check when required, and a written estimate that includes the city’s plan check fees up front.
Detached Units on Flat Lots
Flat-lot infill in central Glendale is the most straightforward ADU build we do. The foundation is standard, grading is minimal, and if you’re within the transit buffer, the parking exemption keeps site work simple. These projects typically complete in 7 to 10 months from contract to final inspection.
Hillside and Canyon Builds
Hillside lots change everything: the foundation, the drainage plan, the retaining walls, and the timeline. We’ve built enough of these in the Chevy Chase Canyon area to give you an honest range before you commit. Expect geotech review to add four to six weeks and site work to add $15,000 to $40,000 compared to a flat lot.
Trusted Brands We Service in Glendale
We’re authorized to build with Abodu, Cover, and Dvele, and we use James Hardie siding on most of our Glendale projects. These are brands you can research on your own, and they all offer 3D configurators and published specs. For Glendale customers, we keep local stock of common cladding and trim materials, which means we don’t wait on out-of-state freight when plan check revisions call for material changes. A prefab shell from Abodu or Cover can compress the construction calendar by six to ten weeks compared to site-built framing, and we handle the install, foundation, and interior finish so you get one point of contact.
Common ADU Builders Problems We See in Glendale Homes
- Skipped parking requirement. Homeowners assume Glendale matches the state’s blanket parking exemption. Many hillside lots here still need covered parking, and discovering that during plan check forces a full redesign that costs thousands.
- Unquoted geotech and drainage fees. Canyon and foothill properties trigger slope stability and drainage review. These fees hit during plan check, and contractors who didn’t include them send surprise change orders.
- Flat square-foot pricing with no site allowance. A home in Rossmoyne and a home in the Verdugo foothills are not the same build. Quoting one number for both means someone is getting billed for work that wasn’t scoped.
- Uniformed or unvetted workers on site. Glendale homeowners are right to want to know who is on their property. Background-checked, uniformed technicians are standard for us, not an upgrade.
Pricing for ADU Builders in Glendale, CA
Here are the honest numbers for Glendale. A studio ADU runs $110,000 to $160,000. A one-bedroom detached unit runs $130,000 to $220,000. A two-bedroom ADU runs $200,000 to $420,000. Site work and hillside requirements are the biggest cost drivers after square footage, and Glendale’s separate fire, seismic, and hillside review fees add $5,000 to $15,000 to the permit phase alone. We include those in your written estimate before you sign anything. If the price changes later, it’s because you changed the scope, not because we “discovered” something we should have found in design. Call (903) 568-7222 for a free, written estimate with real numbers.
We were called to a 1950s ranch home on a sloping lot near the Chevy Chase Canyon area, where the homeowner wanted a detached backyard ADU for an aging parent. We scoped a 600 sq ft unit using James Hardie siding and a prefab shell from a panelized supplier, but the hillside grading and retaining-wall engineering added a geotech report and a slope-drainage plan to the permit set before Glendale would issue. We handled the plan check comments, poured the foundation, set the unit, and finished the interior. The whole process ran about nine months from signed contract to final inspection, and the homeowner got a written price before any of that started.
We Also Serve Cities Near Glendale
If you’re just outside Glendale, our crews work in Burbank, North Hollywood, La Canada Flintridge, and Studio City as well. The rules change at every city line, so we always verify local parking, setback, and hillside requirements before pricing. Call (903) 568-7222 and we’ll tell you what applies to your specific property.
Serving Glendale, CA - Our Local Coverage Area
We’re based in the Glendale area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU Builders in Glendale
Yes, unless your lot is within a half-mile of a transit stop. Glendale enforces this local amendment to state ADU law, and it applies to most new detached units. We verify your transit proximity during the first week of design so the parking requirement is built into your plan, not discovered at plan check. Call (903) 568-7222 and we’ll check your address for free.
Hillside lots trigger geotechnical review, slope-drainage plans, and often retaining wall engineering. These requirements add four to six weeks to plan check and $15,000 to $40,000 in site work compared to a flat lot in central Glendale. You can’t skip them, and any contractor who doesn’t mention them in the first conversation isn’t being straight with you.
Flat-lot projects in Glendale typically clear plan check in 2 to 4 months. Hillside or canyon properties run 4 to 8 months because of the additional geotechnical and slope-drainage reviews. We handle the resubmittals and plan check comments for you, and we’ll give you a written timeline before we start.
The only thing that changes your price is a scope change you request: moving a wall, upgrading finishes, or changing the cladding. Our written estimate includes the site conditions, permit fees, and materials we can see during design. If Glendale’s plan check returns a comment we didn’t anticipate, that’s on us, not on your invoice.
Yes, but they require the same geotechnical and foundation engineering as a site-built unit. The prefab shell saves time on framing, not on soils work. We install Abodu, Cover, and Dvele units in Glendale and coordinate the hillside engineering so your prefab project meets the same slope-drainage requirements as any other build.
Written by Troy Eastman, Owner at Benson ADU Builders, serving Glendale with written pricing and the 365-Day Done Right Promise.
Ready to know what your Glendale ADU will actually cost? Call (903) 568-7222 for a free, written estimate. A real person answers, and you’ll get a price before anyone asks you to sign.
