Fast, Reliable New Detached ADU Across Van Nuys
A new detached ADU in Van Nuys typically costs $180,000 to $320,000 all-in for a 600 to 1,000 square foot unit, from drawings through final inspection. The single biggest cost driver isn’t square footage. It’s what the 1950s housing stock and Van Nuys heat force you to fix once the project opens up. We’re Ellery ADU Studio, a design-build practice that has designed, permitted, and built 900+ ADUs since 2015, and we quote Van Nuys projects only after our team has walked the lot and reviewed the existing conditions. Call (971) 497-2402 and we’ll get you a written price, not a ballpark.
Why Ellery ADU Studio Is Van Nuys’s Preferred New Detached ADU Company
Van Nuys homeowners come to us because the permit set is the product, not an afterthought. The wide, flat postwar lots off Vanowen, Victory, and Sepulveda have real ADU potential, but they also hide real conditions: original slabs without footings, 100-amp panels that LADBS won’t pass, and roof framing that was never built for 117°F afternoons. Our design-build model means one contract covers the drawings, the permit set, and the construction at one written price. There is no designer-versus-builder gap because there’s no separate designer and builder. Nadia Ellery founded the studio in 2015, the year California’s ADU permitting landscape shifted, and every project since has been priced in writing before work starts, per Haven Standard Clause 1.
Our crews know the Van Nuys LADBS district office and what its plan reviewers flag on detached ADU submittals. That’s not a slogan. It’s the reason our Van Nuys projects get through plan check with fewer corrections than ones quoted by firms that don’t work this part of the Valley regularly. Every visit includes a documented photo record, and every finished ADU carries the 365-Day Done Right Promise: if it’s not built to the permitted drawings, we make it right, in writing, before the project ever starts.
We serve Van Nuys from our Los Angeles office, with crews scheduled locally. A live person answers calls 24/7. If you already have a written estimate from another firm, bring it to us for a free second opinion.
Our New Detached ADU Services in Van Nuys
We build new detached ADUs under one contract at one written price. Here’s how that plays out in Van Nuys, where the 1950s and 1960s ranch stock sets the conditions.
Custom Built ADU
A custom detached ADU on a Van Nuys R1 lot is designed around the actual site: the existing garage location, the setback requirements LADBS applies to your specific parcel, and the way afternoon sun hits the west-facing wall for four months a year. We handle the full permit set, the structural drawings, and the construction. Because we price at one contract, the foundation allowance we write in for the soils condition on your lot is not a surprise later. It’s a line item.
Studio ADU
A 400 to 500 square foot studio ADU on a Van Nuys lot typically runs $150,000 to $210,000, depending on what the foundation and panel need. The studio is often the right answer for a lot where the existing detached garage is too damaged to convert but the footprint is ideal. We design to Title 24 cooling-load compliance for CEC Climate Zone 9, which means the mini-split gets sized for triple-digit heat, not a coastal chart.
1-Bed & 2-Bed ADU
Most Van Nuys detached ADUs we price are 1-bed or 2-bed in-law suites for multigenerational households, not rental plays. A 1-bed typically runs $190,000 to $275,000. A 2-bed runs $230,000 to $320,000. The range is driven by what the site needs: if the existing garage slab has no perimeter footing, the continuous grade beam add is a real number. We write it as an allowance in the contract, not a change order waiting to happen.
Prefab ADU Installation
We specify and coordinate prefab and modular systems from Abodu, Cover, and Dvele within the same single contract. For Van Nuys, the prefab path can shorten the on-site construction window, but the foundation and utility work still has to meet LADBS requirements. Our team handles site prep, the panel upgrade if your home still has 100-amp service, and the connection of the unit to sewage, water, and power. The written price covers all of it.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Van Nuys
We coordinate Abodu, Cover, and Dvele systems for Van Nuys clients, along with Mighty Buildings where the design calls for it. The advantage isn’t the brand name. It’s that one contract covers the prefab unit, the foundation, the utility connections, and the LADBS permit set. We don’t hand you a shell and walk away. We deliver the finished, permitted ADU with a documented photo record and the same 365-Day Done Right Promise as a fully custom build.
Common New Detached ADU Problems We See in Van Nuys Homes
- Original slab poured directly on grade with no perimeter footing. Almost every detached garage from the 1950s or 1960s in Van Nuys has this condition. When LADBS plan review flags it, a continuous grade beam becomes mandatory, and homeowners who priced from a generic calculator get a five-figure surprise. We write the allowance before we submit the permit package.
- 100-amp electrical panels that LADBS won’t pass. The ranch stock across Van Nuys was built for a different era. A new detached ADU almost always triggers a 200-amp service upgrade as a permitting condition. We inspect the panel during our first site walk and tell you, in writing, whether it’s required for your project.
- Roof framing and waterproofing underbuilt for Zone 9 heat. Van Nuys has no marine layer. September 2020 hit 117°F. Roof assemblies that survive in West LA fail early out here from UV exposure and sustained heat, so we re-flash and insulate to the stricter Title 24 standard that CEC Climate Zone 9 demands.
- Setback and soils review surprises at the LADBS district office. The Van Nuys district office applies soils and foundation review more aggressively than some other parts of the city. We know what the reviewers ask for on detached ADUs here because we’ve submitted hundreds of permit packages to this office. The contract reflects that knowledge before the review happens.
Pricing for New Detached ADU in Van Nuys, CA
Pricing for a new detached ADU in Van Nuys breaks down like this:
- Studio ADU (400-500 sq ft): $150,000-$210,000
- 1-Bedroom ADU (500-700 sq ft): $190,000-$275,000
- 2-Bedroom ADU (700-1,000 sq ft): $230,000-$320,000
- Prefab ADU (including foundation and utilities): $160,000-$280,000 depending on unit and site conditions
These ranges include design, permit set, LADBS fees, construction, and final inspection. The number that moves a Van Nuys quote is typically the foundation line item and the panel upgrade, not the square footage. Every project is quoted with a written price before any work begins, per Haven Standard Clause 1. Call (971) 497-2402 to schedule a site walk and get your number in writing.
We Also Serve Cities Near Van Nuys
Our New Detached ADU team handles the full permit set and construction for homeowners in Sherman Oaks, Studio City, North Hollywood, and North Hills, with the same written-price standard we apply to every New Detached ADU in Van Nuys project. The soils and panel conditions change from block to block. The contract model doesn’t.
Serving Van Nuys, CA - Our Local Coverage Area
We’re based in the Van Nuys 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 - New Detached ADU in Van Nuys
Because the original garages on Van Nuys ranch lots were poured directly on grade with no perimeter footing built for habitable load. When the permit package reaches the Van Nuys LADBS district office, a soils or foundation review almost always triggers a requirement for a new continuous grade beam. We write this as a line-item allowance before we submit, so the cost is known upfront. Call (971) 497-2402 and we’ll inspect your slab during the free site walk.
If your home still has the original 100-amp panel common to the 1950s and 1960s stock in Van Nuys, LADBS will almost certainly require a 200-amp service upgrade as a condition of ADU permitting. We inspect the panel on our first visit and tell you in writing whether this line item applies to your project. The upgrade is priced in the contract before work starts, not discovered after demo. Call (971) 497-2402 for an exact assessment.
Van Nuys sits in CEC Climate Zone 9, which means Title 24 cooling-load compliance is substantially more demanding than in coastal LA neighborhoods. A mini-split sized for Santa Monica conditions will not hold a Van Nuys ADU at a livable temperature during the sustained triple-digit stretches this neighborhood gets. We size equipment for the actual climate, and we write that sizing into the permit set. Call (971) 497-2402 to talk through the load calculation for your lot.
If the quote is done right, it won’t change. We open up the existing structure during the site walk, identify the footing, panel, and framing conditions, and write allowances for the code upgrades LADBS will require. A quote that skips this step is the one that changes mid-project. Our written price covers what we find because we find it before we quote. Call (971) 497-2402 for a free second opinion if you already have an estimate in hand.
Not always as a standalone report, but the Van Nuys LADBS district office applies a soils and foundation review on nearly every detached ADU permit package, and the result often requires a continuous grade beam for an existing garage slab. We’ll tell you whether your specific parcel needs a report after we walk the lot. The foundation work is priced as a written allowance before we submit anything. Call (971) 497-2402 for a site walk and a written price.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving Van Nuys since 2015.