ADU in North Hollywood, CA
Junior ADU and interior conversion projects in North Hollywood typically run $85,000-$165,000 all-in, drawings through final inspection, while site prep and utility work ranges from $18,000-$75,000 depending on whether your postwar home needs a full electrical service upgrade. We’re Ellery ADU Studio, and we’ve designed, permitted, and built over 900 ADUs since 2015 under one contract at one written price. If you’re weighing an ADU on a NoHo lot near the Metro station, the TOC density bonuses here can change what’s possible. Call (747) 322-4648 to schedule your free estimate.
Why North Hollywood Homes Are Different
North Hollywood sits in the inland San Fernando Valley where summer temperatures routinely top 100°F, often 12-15°F hotter than coastal LA. That thermal load makes Title 24 energy compliance and dedicated mechanical cooling mandatory, not optional, in every ADU we design here.
The housing stock is overwhelmingly postwar single-family, built late 1940s through 1960s, on rectangular lots with alley-accessed detached garages. Many parcels carry R2 or R3 zoning, enabling multi-unit-plus-ADU stacking that suburban R1 lots cannot match. The 60-amp garage subpanels common to this era are inadequate for modern ADU loads; we budget for 200-amp service upgrades as a standard line item.
Crucially, North Hollywood’s location within LA’s Transit-Oriented Communities tier zones, anchored by the NoHo Metro B/G Line station, unlocks density bonuses and relaxed development standards that independent cities like Burbank or Glendale cannot offer. A standard R1 lot near the station can legally accommodate a primary home, an ADU, and a JADU simultaneously under by-right approval.
Our Main North Hollywood Services
North Hollywood homeowners call us most often for these three services, each with its own dedicated page:
ADU Design & Permitting in North Hollywood
We treat the permit set as the core product, not an afterthought. In North Hollywood, that means navigating LA’s TOC tier bonuses alongside standard ADU law, documenting the existing conditions of your postwar foundation and electrical service, and producing a construction-ready set that eliminates the designer-versus-builder blame gap. ADU Design & Permitting in North Hollywood covers the full process from feasibility study to issued permit.
Garage Conversion ADU in North Hollywood
The alley-accessed detached garages typical of North Hollywood’s postwar lots make this the fastest, most cost-effective ADU type here. We assess slab thickness, roof structure, and that near-universal 60-amp subpanel before quoting, so the scope is locked at signing. Garage Conversion ADU in North Hollywood details what we find on most NoHo sites.
New Detached ADU in North Hollywood
For homeowners who want to preserve garage parking or whose existing structure won’t convert economically, we design and build new detached units from foundation to final inspection. TOC tier bonuses near the Metro station can reduce setback requirements and increase maximum unit size. New Detached ADU in North Hollywood explains how we coordinate prefab systems like Cover or Dvele within our single-contract model.
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 and interior conversion work in North Hollywood solves a specific problem: you’ve got underused square footage inside the existing envelope, and California’s JADU law lets you create a separate rental unit without adding new foundation or roof. For homeowners who bought their postwar home at peak prices between 2015 and 2025, this is often the lowest-capital path to rental income, though the 500-square-foot JADU cap and owner-occupancy requirement shape what makes sense. We handle the full Junior ADU & Interior Conversion process, from verifying your interior space qualifies to producing the permit set and completing construction under one written price.
Room-to-ADU Conversion
Signs you need it
You’ve got a spare bedroom, den, or former rental unit with separate exterior access that could become a self-contained JADU with a small kitchenette and its own bathroom.
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, fire separation, soundproofing, and utility tie-ins required by LA Building Code.
How we do it
We measure existing ceiling height against JADU minimums, design the kitchenette and bath layout to code, produce the full permit set, and build with documented photo records on every visit.
Interior JADU
Signs you need it
Your postwar home has a self-contained wing, converted garage interior, or accessory space that shares a wall with your primary residence and could meet JADU standards.
What it costs in North Hollywood
Interior JADU projects in North Hollywood generally fall between $75,000-$125,000, depending on whether existing plumbing and electrical can handle the added load or need upgrading.
How we do it
We verify the space meets JADU size and access requirements, design to LA’s fire and sound separation standards, pull permits, and build to the documented drawings under our 365-Day Done Right Promise.
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 |
| Interior JADU (all-in) | $75,000-$125,000 |
| Electrical/plumbing upgrade if needed | $8,000-$22,000 |
Can I convert any room into a JADU in North Hollywood?
No, the space needs separate exterior access, minimum 150 square feet, and a permanent door to the main unit; we verify these during our free feasibility visit. Call (747) 322-4648 to schedule.
Does a JADU require owner occupancy in North Hollywood?
Yes, California JADU law requires the owner to live in either the primary residence or the JADU; this is non-negotiable and we document it in your permit application. Call (747) 322-4648 for details.
ADU Site Prep & Utilities in North Hollywood
ADU site prep and utility work in North Hollywood addresses the gap between your postwar home’s existing infrastructure and what a modern dwelling unit requires. The 60-amp garage subpanels and shallow sewer laterals common to 1950s Valley construction simply weren’t built for kitchen, laundry, and HVAC loads, and the 100°F summer highs make inadequate electrical service a comfort and code issue, not just a capacity one. We handle ADU Site Prep & Utilities as a defined scope within our single contract, with a written price before any work starts.
Electrical Panel Upgrade
Signs you need it
Your existing main panel is 100 amps with a 60-amp garage subpanel, or the ADU load calculation exceeds available capacity.
What it costs in North Hollywood
Electrical panel upgrades in North Hollywood typically run $4,500-$9,500 for a 200-amp service, including permit, inspection, and LADWP coordination.
How we do it
We run the load calculation, specify the new panel and grounding system, pull the permit, coordinate LADWP service release, and pass inspection before rough-in.
Foundation & Grading
Signs you need it
Your garage slab is less than 4 inches thick, cracked, or unpermitted, or you’re building new detached and need engineered fill for the ADU footprint.
What it costs in North Hollywood
Foundation and grading work in North Hollywood ranges from $12,000-$35,000 depending on slab replacement versus new stem-wall construction and soil conditions.
How we do it
We verify existing slab thickness and condition, engineer the new foundation to LA’s expansive-soil requirements, and pour with continuous inspection documentation.
What ADU Site Prep & Utilities Costs in North Hollywood
| Item | Typical range in North Hollywood |
|---|---|
| Electrical panel upgrade to 200A | $4,500-$9,500 |
| Foundation & grading | $12,000-$35,000 |
| Plumbing lateral extension | $3,500-$8,500 |
Will LADWP require a service upgrade for my ADU?
Almost always yes, if your main panel is 100 amps; we coordinate the service release and temporary power as part of our scope. Call (747) 322-4648 for a load assessment.
How long does utility work take before ADU construction starts?
Electrical and plumbing rough-in typically adds 2-4 weeks before framing begins; we sequence this into the overall schedule so it doesn’t delay the build. Call (747) 322-4648 to review your timeline.
Brands We Service in North Hollywood
We specify and coordinate prefab and modular systems from Cover, Dvele, Mighty Buildings, and Boxabl within our single-contract model, with parts and technical support coordinated through our Los Angeles office. Most North Hollywood projects using these systems move from final drawings to site delivery in 12-16 weeks. See our brands for full specifications.
Pricing for ADU in North Hollywood, CA
| Service | Typical range in North Hollywood |
|---|---|
| Room-to-ADU conversion | $85,000-$140,000 |
| Interior JADU | $75,000-$125,000 |
| Electrical panel upgrade | $4,500-$9,500 |
| Foundation & grading | $12,000-$35,000 |
| Plumbing lateral extension | $3,500-$8,500 |
| Electrical/plumbing upgrade (interior) | $8,000-$22,000 |
Prices push higher in North Hollywood when we encounter unpermitted prior work, expansive soil requiring deeper footings, or LADWP service delays. Under Haven Standard Clause 1, your written price is locked at signing; no change orders, no door-side upsells.
Neighborhoods We Serve in North Hollywood
We work across North Hollywood’s full range of residential zones, from TOC tier parcels near the Metro station to deeper Valley lots with alley garage access. Dispatch and scheduling are coordinated from our Los Angeles office; crews serve these neighborhoods with same-week availability for estimates.
- NoHo Arts District
- Valley Village (North Hollywood adjacent)
- Toluca Woods
- Laurel Canyon (North Hollywood portion)
- Valley Glen border zone
Service Area - Cities Near North Hollywood
Our crews work throughout the San Fernando Valley and adjacent communities. We regularly coordinate permits and inspections for homeowners in Studio City, CA, Van Nuys, CA, Burbank, CA, and Glendale, CA, though each independent city maintains its own ADU ordinance and fee schedule distinct from LA’s TOC framework.
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
Transit-Oriented Communities tier zones near the NoHo Metro station allow density bonuses and relaxed setbacks that can increase your ADU size or reduce required yard space; we verify your parcel’s TOC status during feasibility and design to capture these benefits.
California law prohibits HOAs from outright banning ADUs, but some North Hollywood condo associations and planned developments have design guidelines we must address; we review your CC&Rs and incorporate compliant specifications into the permit set.
We typically mobilize within 10-14 days of permit issuance for site prep and utility work, and within 3-4 weeks for interior conversions, depending on material lead times; your written schedule is fixed at contract signing under Haven Standard Clause 5.
Call (747) 322-4648 to schedule your free estimate. Every project receives a written price before any work starts, a documented photo record on every visit, and our 365-Day Done Right Promise, backed in writing.
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
"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."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."Every allowance was itemised at the start, so the finish selections did not turn into a surprise at the end."
- Benedict H.