ADU in North Hollywood, CA
Junior ADU & Interior Conversion in North Hollywood typically runs $85,000-$165,000 all-in, drawings through final inspection, while ADU Site Prep & Utilities starts around $15,000-$45,000 depending on whether your 1940s-era electrical panel and alley-fed sewer lateral need full replacement. We’re Ellery ADU Studio, and we’ve designed, permitted, and built more than 900 ADUs since 2015 under a single contract at a single written price. In North Hollywood, that means we account for San Fernando Valley heat-sink conditions, original garage slabs that won’t pass modern bearing requirements, and AB 2097’s parking exemption before we ever put a number in writing. Call (213) 329-7167 to schedule your free estimate.
Why North Hollywood Homes Are Different
North Hollywood sits on the flat floor of the San Fernando Valley, a basin that traps summer heat and regularly pushes temperatures past 105°F. That radiant load turns garage walls into ovens and makes Title 24 energy compliance for any ADU conversion a genuine engineering problem, not a checkbox. CEC Climate Zone 9 demands above-minimum wall and roof insulation plus a properly sized mini-split, and we size those systems from actual load calculations, not rules of thumb.
The housing stock is remarkably consistent: 1940s-1960s stucco-over-wood-frame ranch homes on 6,000-7,500 sq ft lots, almost all with a detached one- or two-car garage fed by a rear alley. Those garages sit on uninsulated slab-on-grade pads with substandard footings and aging 60-amp or early 100-amp electrical service. Before any interior conversion can pass City of LA inspection, that electrical service needs a full panel upgrade, and the slab often needs reinforcement or replacement.
Here’s the distinctive advantage: North Hollywood Station anchors the eastern terminus of Metro’s B Line and G Line, putting virtually the entire neighborhood within a half-mile of major transit and triggering AB 2097’s elimination of replacement parking requirements for ADU conversions. Homeowners here can convert their detached garages to fully permitted ADUs without replacing the lost parking stall. That same blanket exemption does not apply in neighboring Burbank, Glendale, or most other San Fernando Valley neighborhoods. The alley-facing lots also mean converted garage ADUs can carry their own alley address, separate utility drop, and independent pedestrian entrance, satisfying functional-separation requirements without awkward easements.
Our Main North Hollywood Services
North Hollywood homeowners call us most often for these three services, each with its own dedicated page and pricing:
ADU Design & Permitting in North Hollywood
We produce the full permit set, structural calculations, and Title 24 energy documentation as the core product, not an afterthought. In North Hollywood, that means addressing AB 2097 parking exemptions in the site plan, sizing HVAC for CEC Zone 9 heat loads, and coordinating with LADBS plan checkers who know this housing stock. Every permit set is delivered with a written price locked before work starts. ADU Design & Permitting in North Hollywood covers our full process.
Garage Conversion ADU in North Hollywood
The most common ADU type in North Hollywood: detached alley-access garages with independent addresses, converted under a single contract that covers structural reinforcement, electrical panel upgrade, insulation, and final inspection. We assess the existing slab, footing depth, and alley utility access before quoting. Garage Conversion ADU in North Hollywood details what we find on typical valley ranch homes.
New Detached ADU in North Hollywood
When the existing garage is too far gone or the lot allows a better-placed unit, we design and build new detached ADUs from foundation to final inspection. North Hollywood’s flat valley floor and alley-access lots often allow optimal siting for privacy and natural ventilation, though setback variances may apply depending on your specific block. New Detached ADU in North Hollywood explains site evaluation and design options.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Before
AfterJunior ADU & Interior Conversion in North Hollywood
Junior ADU & Interior Conversion in North Hollywood solves a specific problem: homeowners who want rental income or multigenerational housing without building new square footage. The valley’s post-WWII ranch stock offers four common conversion paths, each with distinct structural and code requirements. We evaluate which path your property supports during our first site visit, and we quote a single written price for the full design-build scope. Junior ADU & Interior Conversion explains our process across all project types.
Room-to-ADU Conversion
Signs you need it
You have an underused bedroom wing, attached in-law space, or former servant’s quarters with separate exterior access that could become a self-contained unit.
What it costs in North Hollywood
Room-to-ADU conversions in North Hollywood typically run $85,000-$140,000 all-in, including the permit set, structural verification, kitchen and bath rough-in, and final inspection.
How we do it
We verify the existing footprint against R-1 zoning setbacks, design a kitchenette and full bath layout that meets JADU code, run new electrical and plumbing from the main panel, and shepherd the LADBS permit through plan check.
Above-Garage ADU
Signs you need it
Your detached garage has sufficient headroom below the rafters and a slab or footing system that can support a second-floor structural load.
What it costs in North Hollywood
Above-garage ADUs in North Hollywood typically range $120,000-$165,000, reflecting the structural reinforcement, staircase addition, and fire separation between garage and living space.
How we do it
We engineer a new floor system and egress staircase, replace or supplement the existing footing, insulate and fire-rate the garage ceiling, and deliver a full permit set with Title 24 compliance for the occupied second story.
What Junior ADU & Interior Conversion Costs in North Hollywood
| Item | Typical range in North Hollywood |
|---|---|
| Room-to-ADU conversion, all-in | $85,000 - $140,000 |
| Above-garage ADU, all-in | $120,000 - $165,000 |
| Interior JADU (existing attached space) | $75,000 - $125,000 |
Can a Junior ADU have its own kitchen in North Hollywood?
Yes, California state law permits a full efficiency kitchen in a Junior ADU, and LADBS enforces this in North Hollywood. Your JADU must remain within 500 square feet and share a wall with the primary residence, but it gets independent utility metering if desired. Call (213) 329-7167 for an exact quote on your layout - estimates are free.
Does my interior conversion need a separate entrance?
Yes, all ADUs and JADUs in Los Angeles require a separate exterior entrance, though JADUs may share an interior door with the main house. In North Hollywood’s alley-lot configuration, we often locate this entrance on the side or rear facade to preserve street-facing aesthetics. Call (213) 329-7167 for an exact quote - estimates are free.
ADU Site Prep & Utilities in North Hollywood
ADU Site Prep & Utilities in North Hollywood addresses the hidden infrastructure that must be sound before any conversion or new build can proceed. The valley’s 1940s-1960s housing stock means original 60-amp panels, clay sewer laterals, and uninsulated slabs that won’t meet current code. We assess these systems during our initial site visit and quote the full prep scope in writing before breaking ground. ADU Site Prep & Utilities covers our evaluation process.
Electrical Panel Upgrade
Signs you need it
Your existing panel is rated at 60 or 100 amps, has fused disconnects instead of breakers, or shows corrosion from decades of valley heat cycling.
What it costs in North Hollywood
Electrical panel upgrades in North Hollywood typically run $4,500-$8,500 for a 200-amp service with new meter socket, grounding, and LADBS inspection.
How we do it
We coordinate with LADWP for service disconnect, install a new main panel and subpanel for the ADU, run dedicated circuits per the approved electrical plan, and schedule LADBS rough and final electrical inspections.
Foundation & Grading
Signs you need it
Your garage slab measures less than 4 inches thick, shows heaving or cracking from expansive valley soil, or lacks perimeter footings entirely.
What it costs in North Hollywood
Foundation repair or replacement for ADU conversion in North Hollywood typically ranges $12,000-$28,000 depending on square footage and whether imported fill is needed.
How we do it
We remove the existing slab if required, excavate to bearing soil, pour perimeter footings and a new 4-inch minimum slab with vapor barrier and edge insulation, then submit structural observations to LADBS.
What ADU Site Prep & Utilities Costs in North Hollywood
| Item | Typical range in North Hollywood |
|---|---|
| Electrical panel upgrade to 200A | $4,500 - $8,500 |
| Foundation repair / replacement | $12,000 - $28,000 |
| Plumbing lateral replacement | $8,000 - $18,000 |
Will LADWP require a new service drop for my ADU?
Often yes, especially if your existing service is 100 amps or less and the ADU adds significant electrical load. In North Hollywood’s alley-fed configuration, we coordinate with LADWP early to determine whether the existing drop can handle the additional demand or a second meter is required. Call (213) 329-7167 for an exact quote - estimates are free.
How long does site prep take before construction starts?
Typical site prep and utility work in North Hollywood takes 3-6 weeks, including LADBS permit issuance and LADWP scheduling. We sequence this work under the same contract as your ADU build, with a single written price and timeline. Call (213) 329-7167 for an exact quote - estimates are free.
Brands We Service in North Hollywood
We specify and coordinate prefab and modular systems from Abodu, Cover, and Mighty Buildings within our single-contract design-build model, integrating their factory-built modules with site-specific foundation, utility, and permit work. Our Los Angeles office stocks common connection hardware and maintains direct supplier relationships for 2-4 week turnaround on most replacement components. See our brands for full compatibility details.
Pricing for ADU in North Hollywood, CA
| Service | Typical range in North Hollywood |
|---|---|
| Room-to-ADU conversion, all-in | $85,000 - $140,000 |
| Above-garage ADU, all-in | $120,000 - $165,000 |
| Interior JADU, all-in | $75,000 - $125,000 |
| Electrical panel upgrade to 200A | $4,500 - $8,500 |
| Foundation repair / replacement | $12,000 - $28,000 |
| Plumbing lateral replacement | $8,000 - $18,000 |
| Full garage conversion ADU | $110,000 - $175,000 |
| New detached ADU (design-build) | $250,000 - $400,000 |
In North Hollywood, price drivers include the condition of your existing slab and electrical service, whether your property triggers AB 2097’s parking exemption, and the extent of Title 24 energy upgrades required for CEC Zone 9. Every figure above is paired with our written-price guarantee under Haven Standard Clause 1: the scope is locked at signing, with no door-side upsells or scope creep.
Neighborhoods We Serve in North Hollywood
We work across North Hollywood’s full residential footprint, from the Metro-adjacent blocks near North Hollywood Station to the deeper valley ranch neighborhoods. Dispatch and scheduling are coordinated from our Los Angeles office; crews serve North Hollywood locally with same-week site visit availability for most projects.
- Valley Village (southeast North Hollywood)
- NoHo Arts District (west of Lankershim)
- Toluca Woods (northeast, near the Burbank border)
- Laurel Canyon-adjacent flats (southwest, below Mulholland)
- North Hollywood West (between Coldwater Canyon and the 170)
Service Area - Cities Near North Hollywood
Our crews work throughout the central San Fernando Valley and adjacent communities. We regularly coordinate ADU projects for homeowners in Studio City, CA, where hillside lots present different foundation challenges; Van Nuys, CA, with its similar post-war ranch stock and alley configurations; Burbank, CA, which maintains its own permit authority and distinct parking requirements; and Glendale, CA, where hillside grading and geotechnical conditions often extend site prep timelines.
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 About ADU in North Hollywood
AB 2097 eliminates replacement parking requirements for ADU conversions within a half-mile of major transit. North Hollywood Station’s B Line and G Line terminus covers most of the neighborhood, meaning you can convert your detached garage without replacing the lost parking stall - an advantage not available in Burbank or Glendale under the same blanket conditions.
Most North Hollywood neighborhoods lack HOAs, but if your property is subject to one, California law prohibits HOAs from outright banning ADUs, though they may impose reasonable design guidelines. We review your CC&Rs during our initial site visit and address any compliance requirements in the permit set.
We can evaluate any existing permit set or design drawings during our Free Second Opinion consultation. However, our single-contract model requires that we stand behind the full scope, so we typically adapt or redraw the permit set to our standard to honor the 365-Day Done Right Promise.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What North Hollywood Customers Say
"The rental income has covered the payment since the second month. They were realistic about the numbers rather than optimistic."
- Odette N."Garage conversion finished on the drawings and close to the schedule. They were honest that the sewer connection was the unknown, and it was."
- Arjun D."They walked us through setbacks and utility capacity before we paid anything, and told us one of our two options was not going to get approved."
- Mireille T.