Fast, Reliable New Detached ADU Across North Hollywood
A new detached ADU in North Hollywood typically costs $220,000-$480,000 all-in, from permit set through final inspection, with most projects finishing in 8-14 months depending on utility scope and foundation conditions. We coordinate design, permitting, and construction from our Los Angeles office, with crews serving North Hollywood locally. Call (424) 523-8492 to schedule your free estimate.
North Hollywood’s post-WWII housing stock - single-story ranches on 6,000-7,500 sq ft lots, many with rear alleys and detached garages - creates one of the most conversion-ready footprints in Los Angeles. We’ve designed, permitted, and built 900+ ADUs since 2015, and the NoHo projects that run smoothest are the ones where we scope the existing conditions before quoting, not after.
Why Ellery ADU Studio Van Nuys Is North Hollywood’s Preferred New Detached ADU Company
We’ve worked the NoHo Arts District, the neighborhoods off Camarillo Street, and the ranch-home blocks near the Metro B Line terminus. North Hollywood homeowners find us because they want the permit set treated as the core product, not an afterthought. Our New Detached ADU team handles drawings, structural calculations, and the full build under one contract at one written price - Haven Standard, Clause 1.
Our reviews from North Hollywood customers consistently cite two things: the documented photo record they receive after every site visit, and the fact that the price at signing matched the price at final invoice. No door-side upsells. No scope creep. Under Clause 5 (No Surprises), the scope is locked at signing.
Response time matters on a six-figure project. A live person answers our phone 24/7, and we schedule North Hollywood site evaluations within a few business days. Dispatch and scheduling are coordinated from our Los Angeles office; crews serve North Hollywood locally.
What separates us from a standard contractor is that we specify and coordinate prefab and modular systems - Abodu, Cover, James Hardie - within that same single contract. The designer can’t blame the builder, and the builder can’t blame the designer. One written price. One point of accountability.
Our New Detached ADU Services in North Hollywood
Custom Built ADU
A custom built detached ADU in North Hollywood runs $280,000-$480,000 all-in, depending on square footage, foundation requirements, and whether the existing garage slab can be retained or needs replacement. On a typical 1950s NoHo ranch, the original slab-on-grade was poured for a car, not a dwelling. It often lacks the thickened edge and vapor barrier an ADU requires. We test this during our initial site evaluation and scope a re-pour if needed - before quoting, not after. That transparency is Haven Standard, Clause 1.
Prefab ADU Installation
Prefab ADU installation in North Hollywood typically ranges $220,000-$380,000, including crane access, foundation, utility tie-ins, and final finish work. The alley-served lots common in NoHo simplify crane staging and module delivery compared to tight Westside sites. We coordinate Abodu and Cover systems within our single-contract model, handling the manufacturer’s spec compliance, the foundation engineering, and the local permit set ourselves. You deal with one entity.
Modular ADU
Modular ADU projects in North Hollywood generally fall between $240,000-$400,000. The distinction from prefab: modular units arrive 80-90% complete and require more precise foundation tolerances. On Valley lots with the clay-heavy soils common near the Los Angeles River corridor, we scope geotechnical recommendations early. James Hardie exterior cladding is a specification we often pair with modular systems for thermal performance and fire resistance.
Studio ADU
A studio detached ADU in North Hollywood - 300-450 sq ft - typically runs $220,000-$320,000. These units make sense for alley-served lots where the garage footprint is limited but the separate utility connection point preserves rental income potential. We built a 600 sq ft studio detached ADU on an alley-served lot off Camarillo Street in the NoHo Arts District, tying the unit into its own alley-facing utility connection point and running a dedicated 100-amp subpanel off the existing 100-amp main that had served the 1950s ranch since it was built. During the first August heat wave the minisplit and a closed-cell thermal envelope kept the unit under 78°F while the main house struggled past 85°F - the HVAC and insulation were non-negotiable line items we scoped before quoting, not upgrades we upsold after.
1-Bed & 2-Bed ADU
One-bedroom detached ADUs in North Hollywood typically cost $280,000-$400,000; two-bedroom units run $350,000-$480,000. The price jump isn’t just square footage. A 2-bed ADU triggers stricter Los Angeles Department of Building and Safety requirements for egress windows, kitchen ventilation, and in some cases parking - though North Hollywood’s Transit Priority Area status often waives that last item. We confirm TPA eligibility during our initial zoning review and document it in your permit set.
What happens when you call
- 1
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.
Before
AfterTrusted Brands We Service in North Hollywood
We specify and coordinate prefab and modular systems from Abodu, Cover, and James Hardie within our single-contract model. For North Hollywood homeowners, this means the manufacturer’s warranty and our 365-Day Done Right Promise operate in parallel - if the finished ADU is not built to the permitted drawings, we make it right, in writing, before the project starts. We maintain relationships with these suppliers’ Los Angeles-region distribution networks, which keeps material lead times predictable and avoids the delays that plague projects reliant on long-haul shipping.
Common New Detached ADU Problems We See in North Hollywood Homes
- Treating a 1950s NoHo garage slab as a foundation. The original slab-on-grade was poured for a car, not a dwelling, and often lacks the thickened edge and vapor barrier an ADU requires. A re-pour can add $15,000-$30,000 and erase the Transit Priority Area savings that made the project attractive.
- Skipping the thermal envelope. A garage with no wall or attic insulation becomes genuinely unrentable in a NoHo summer of multiple 105°F+ days. Retrofitting after drywall is far more expensive than scoping it up front. We specify closed-cell spray foam and mini-split sizing as baseline, not upgrades.
- Pulling the ADU permit before addressing the original electrical and plumbing. The 60-100 amp main panels and galvanized supply lines common on 1950s ranches can’t handle the ADU load calculation. The automatic service upgrade and re-plumb scope surfaces the moment the permit is pulled - we identify this during pre-quote evaluation.
- Overlooking the rear alley grid. Building the ADU against the main house instead of the alley-facing orientation forfeits the separate metering, private entry, and utility connection point that makes NoHo detached ADUs genuinely independent. We orient the design to capture this layout advantage.
Pricing for New Detached ADU in North Hollywood, CA
Here’s what North Hollywood homeowners can expect, all-in from permit set through final inspection:
| Sub-Service | Typical Range |
|---|---|
| Studio ADU (300-450 sq ft) | $220,000-$320,000 |
| 1-Bed ADU (450-600 sq ft) | $280,000-$400,000 |
| 2-Bed ADU (600-850 sq ft) | $350,000-$480,000 |
| Prefab ADU Installation | $220,000-$380,000 |
| Modular ADU | $240,000-$400,000 |
Three factors move these ranges: foundation condition (retain vs. replace), utility distance (alley connection point vs. long trench to the main house), and electrical service capacity (panel upgrade required or not). Because North Hollywood sits in a Transit Priority Area, the replacement-parking waiver alone typically saves $20,000-$40,000 compared to non-TPA Valley projects - a structural cost advantage we factor into every NoHo quote. Every project receives a written price before any work starts, per Haven Standard, Clause 1. Call (424) 523-8492 for your exact scope and quote - estimates are free.
We Also Serve Cities Near North Hollywood
Our crews work throughout the San Fernando Valley and adjacent communities. We also serve North Hollywood neighbors in Studio City, Van Nuys, Burbank, and Glendale - each with their own zoning contexts, foundation conditions, and utility constraints that we scope before quoting.
Serving North Hollywood, CA - Our Local Coverage Area
We’re based in the North Hollywood 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 North Hollywood
Yes. Most of North Hollywood falls within a designated Transit Priority Area under LA City’s ADU ordinance and California AB 2097, which waives the replacement-parking requirement when you demolish an existing garage for a detached ADU. That exemption eliminates $20,000-$40,000 or more in site work, grading, and paving that non-TPA Valley homeowners must absorb. We verify your parcel’s TPA status during our initial zoning review and document it in the permit set. Call (424) 523-8492 to confirm your property qualifies - estimates are free.
Yes, and this is one of NoHo’s structural advantages. The 1950s alley grid was designed for separate rear access, which means a detached garage ADU can often receive its own alley-facing address and dedicated utility connection point. Separate metering simplifies rental income documentation, and the private entry makes the unit genuinely independent from the main house. We orient our designs to capture this layout rather than forfeiting it by building against the primary residence. Call (424) 523-8492 to evaluate your alley access - estimates are free.
Because the San Fernando Valley runs 10-15°F hotter than the Westside on summer afternoons, and North Hollywood sees multiple 105°F+ days annually with minimal coastal cooling. A converted garage with no wall or attic insulation becomes genuinely unrentable. Retrofitting insulation after drywall is installed costs roughly double what it does during initial construction. We specify closed-cell spray foam and properly sized mini-split systems as baseline line items, scoped before quoting. Call (424) 523-8492 to review the thermal envelope for your specific project - estimates are free.
The 60-100 amp main panels and galvanized or early-copper supply lines common on 1940s-1960s North Hollywood ranches cannot handle the additional load of a detached ADU. When the permit is pulled, the Los Angeles Department of Building and Safety requires a load calculation that almost always triggers a service upgrade to 200 amps and a full re-plumb to copper or PEX. We identify these conditions during our pre-quote site evaluation, photograph them for your documented record, and include the upgrade scope in your written price - not as a surprise change order. Call (424) 523-8492 to assess your existing service - estimates are free.
Yes. The 6,000-7,500 sq ft lots and rear alley access typical of NoHo are well-suited to prefab and modular delivery. Crane staging is simpler than on tight Westside sites, and the alley often provides the 14-16 ft vertical clearance needed for module placement. We coordinate Abodu, Cover, and modular systems within our single-contract model, handling the manufacturer’s engineering, the foundation design, and the local permit set ourselves. The 365-Day Done Right Promise applies to prefab and custom builds equally. Call (424) 523-8492 to evaluate module access for your lot - estimates are free.
Ready to scope your project? Call (424) 523-8492 to schedule your free estimate. You’ll receive a written price before any work starts, a documented photo record on every visit, and the full terms of The Haven Standard in writing - including our 365-Day Done Right Promise.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving North Hollywood since 2015.