Trusted Garage Conversion ADU for North Hollywood Homeowners
A garage conversion ADU in North Hollywood typically runs $95,000-$185,000 all-in, from measured drawings through final inspection, and most projects reach certificate of occupancy within 8-14 months. Since 2015, Ellery ADU Studio has designed, permitted, and built over 900 ADUs across Los Angeles County, every one at a written price agreed before any work started, per Haven Standard Clause 1. Nadia Ellery leads a design-build practice that eliminates the designer-versus-builder blame gap: the permit set, the construction documents, and the build itself live under one contract at one fixed price.
North Hollywood’s 91601, 91602, 91605, 91606, and 91607 ZIP codes contain thousands of underutilized garages on R-1 and R-2 lots, many built in the 1940s-1960s with 4-inch slabs and minimal electrical service. These structures are structurally sound for conversion but require careful analysis of setback compliance, fire separation, and utility capacity. The Ellery ADU Studio team has walked these specific neighborhoods, documented their conditions, and permitted conversions on streets from Magnolia Boulevard to Tujunga Avenue. Call (424) 407-8266 to schedule your free estimate. A live person answers 24/7.
What Our Garage Conversion ADU Service Includes
Attached Garage Conversion
An attached garage conversion transforms a garage that shares a wall with your primary residence into a self-contained dwelling unit with its own kitchen, bathroom, sleeping area, and separate entrance. In North Hollywood, these are the most common conversion type because the majority of single-family homes in neighborhoods like Valley Village and the NoHo Arts District have front-facing attached garages that already connect to the house’s structural envelope. Ellery ADU Studio measures the existing slab thickness, evaluates the shared wall’s fire rating per LADBS requirements, and produces a permit set that specifies exactly where the 1-hour fire separation occurs, what penetrations require fire blocking, and how the new HVAC system integrates without compromising the primary residence’s comfort. The written price covers architectural drawings, structural calculations, MEP plans, permit fees, construction, and final inspection.
Detached Garage Conversion
A detached garage conversion turns a freestanding garage into a separate dwelling unit, which triggers stricter setback and utility trenching requirements than attached conversions. North Hollywood’s older lots, particularly south of Burbank Boulevard and east of Lankershim, often have detached garages positioned at the rear property line with only 3-4 feet of side yard clearance. Ellery ADU Studio evaluates whether your detached structure qualifies for a setback variance under California Government Code Section 65852.2 or whether the garage must be repositioned to achieve the required 4-foot rear and side setbacks. Our permit set includes a site plan showing the exact variance request, utility routing from the main house to the detached unit, and a foundation assessment to determine if the existing slab can support residential loads or requires a new stem-wall foundation. Every scenario is priced in writing before any design hours are billed.
Carport Conversion
A carport conversion encloses an open parking structure to create a conditioned ADU, which in North Hollywood often means adding two or three walls, a complete roof assembly, and a foundation where none existed or where only perimeter footings were poured. Carports in the hills north of Mulholland Drive and along the sloped streets near Coldwater Canyon Park frequently lack adequate structural depth for insulation, mechanical systems, and the minimum 7-foot-6-inch ceiling height required by the California Building Code. Ellery ADU Studio assesses whether the existing posts and footings can carry the new wall and roof loads, specifies the exact R-value insulation package for the roof assembly, and documents in the permit set how the new slab or foundation ties into the existing structure. The written scope distinguishes between carports that need full foundation replacement and those that qualify for a slab-on-grade reinforcement, with each condition carrying its own line-item price.
Garage Partition & Bathroom Add
A garage partition and bathroom add creates a Junior ADU or a partial conversion by sectioning off a portion of the garage for living space while retaining parking or storage in the remainder. This option suits North Hollywood homeowners who need to preserve covered parking for personal use or who face lot coverage limits that prohibit full garage elimination. Ellery ADU Studio produces a permit set that defines the partition wall’s location, the wet wall routing for the new bathroom, and the independent electrical panel or subpanel required by LADBS. We specify whether the existing garage door remains operable or is replaced with a code-compliant wall and window assembly, and we document the exact square footage of habitable space versus retained parking to ensure the city calculates your property’s floor area ratio correctly. The written price includes all options, with no change orders once the scope is locked at signing under Haven Standard Clause 5.
Garage JADU
A garage JADU, or Junior Accessory Dwelling Unit, is a specific California classification for a unit up to 500 square feet created within the walls of an existing single-family home or attached garage, with no separate kitchen requirements beyond efficiency kitchen provisions and an exterior door not mandated. North Hollywood homeowners on smaller lots, particularly in the dense blocks near the Metro Orange Line, often choose this path because JADUs bypass parking replacement requirements and certain setback rules that apply to standard ADUs. Ellery ADU Studio verifies that your property qualifies for JADU treatment under AB 68 and SB 13, produces the streamlined permit set that LADBS processes under expedited timelines, and builds to the exact 500-square-foot maximum to maximize rental income or family housing utility. The written contract specifies whether the JADU shares bathroom facilities with the primary residence or includes a new wet room, with each configuration priced separately.
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.
Brands We Service for Garage Conversion ADU
Ellery ADU Studio specifies and coordinates prefab and modular systems within our single-contract design-build model, including Tuff Shed structures that we adapt for residential use with upgraded insulation, electrical rough-in, and mechanical ventilation specified in our permit sets. We’ve integrated Tuff Shed shells into garage replacement scenarios where the existing structure is structurally unsalvageable, producing drawings that show exactly how the prefab frame ties into a new foundation and meets California’s Title 24 energy requirements. James Hardie fiber-cement siding appears in nearly every garage conversion we build, specified in the permit set for its 50-year warranty, fire resistance rating, and color-match consistency with existing primary residence exteriors. Our crews are certified in James Hardie’s installation requirements, and the written scope notes the exact plank exposure and trim profile to eliminate substitution disputes during construction.
We also coordinate Abodu and Cover systems for homeowners who want a detached ADU to replace a garage that cannot be converted, managing the site prep, utility trenching, and foundation work that prefab manufacturers do not include in their base pricing. Whether you have an existing structure from these manufacturers or any other make, we can assess its adaptability, produce the permit set for modifications, and execute the build under one written price. Our fluency across brands means you receive a single point of accountability rather than a chain of vendor handoffs.
Signs You Need Garage Conversion ADU Right Now
- Your garage has been storage for three-plus years and you’re paying for a storage unit elsewhere. The average North Hollywood household spends $180-$340 monthly on off-site storage. Converting that idle square footage to rental income or family housing typically pays back within 5-8 years, and California’s ADU laws prevent cities from blocking conversions that meet health and safety codes. Ellery ADU Studio measures your existing structure and produces a written price within 48 hours of site visit.
- Your adult child or aging parent needs independent housing on your property. North Hollywood’s rental market averages $2,200-$3,100 for a one-bedroom unit, and multigenerational households are increasingly common in the 91605 and 91606 ZIP codes. A garage conversion ADU provides privacy with proximity, and our permit set ensures the unit meets all accessibility and egress requirements for occupants of any age or mobility.
- You bought your home between 2015 and 2022 and need to offset your mortgage with rental income. With interest rates where they are, many North Hollywood homeowners are house-rich and cash-flow-constrained. A permitted garage conversion ADU adds legal square footage to your property’s income potential, and our written price includes the full cost so you can calculate your exact cap rate before committing.
- Your garage slab is cracking, the door is failing, and repair costs are approaching conversion economics. In the 1940s-1960s neighborhoods south of Victory Boulevard, we regularly see garage slabs with differential settlement of 2-4 inches, corroded door tracks, and rotted wood headers. At a certain point, repairing these elements costs nearly as much as converting to a conditioned, permitted ADU. Our site assessment documents exactly where your structure sits on this spectrum.
- You’ve received a notice of violation from LADBS for an unpermitted garage dwelling. Unpermitted garage conversions are common in North Hollywood’s denser blocks, and the city has increased enforcement since 2020. Converting legally protects you from fines, ensures your insurance covers the space, and eliminates the liability of renting an unpermitted unit. Ellery ADU Studio has remediated dozens of these situations, producing permit sets that bring existing conditions into compliance without full demolition.
Our Garage Conversion ADU Process - Step by Step
- 1
Site Measurement & Feasibility Study. We visit your North Hollywood property with laser measurement tools, slab moisture meters, and electrical load testers. Within 72 hours, you receive a feasibility report stating whether your garage qualifies for conversion under current code, what variances or exceptions apply, and a written price range with every line item named. This report becomes the foundation of your permit set; nothing is estimated verbally.
- 2
Permit Set Production. Our architects and structural engineers produce the complete LADBS submittal package: architectural plans, structural calculations, MEP drawings, energy compliance documentation (Title 24), and site plan. For North Hollywood properties, we coordinate directly with Council District 2 and the Van Nuys LADBS office to confirm any local overlay requirements. The permit set is your property; you receive digital and physical copies before construction begins.
- 3
Permit Submission & Correction Cycle. Ellery ADU Studio submits to LADBS and manages the plan check process, responding to corrections without additional fees under Haven Standard Clause 3. Typical North Hollywood garage conversions require one correction cycle for items like fire separation detailing or utility service sizing; we document every city comment and our response in your project file, which you can review at any time.
- 4
Construction & Documented Photo Record. Once permitted, our background-checked, uniformed crews execute the build according to the approved drawings. Every site visit produces a documented photo record showing what was found, what was done, and what remains. You receive these photos within 24 hours of each visit, not a summary at project end. The written scope is locked; no door-side upsells, no scope creep under Haven Standard Clause 5.
- 5
Final Inspection & 365-Day Done Right Promise. We coordinate all inspections, correct any items the inspector flags at our cost, and deliver your certificate of occupancy. Then the 365-Day Done Right Promise begins: if any element of the finished ADU is not built to the permitted drawings, Ellery makes it right, in writing, with no deductible or service fee. This promise is attached to your contract before any work starts, not offered as an afterthought.
How Much Does Garage Conversion ADU Cost in North Hollywood?
A typical attached garage conversion ADU in North Hollywood runs $95,000-$145,000 all-in, from initial measured drawings through final inspection, per our garage conversion ADU cost guide. Detached garage conversions, which often require new utility trenches, upgraded electrical service, and foundation work, typically range $125,000-$185,000. Carport conversions fall between $110,000-$165,000 depending on whether a full foundation is required. Garage partition and bathroom adds, being partial conversions, generally cost $45,000-$85,000. JADUs, with their streamlined requirements and 500-square-foot maximum, typically run $75,000-$125,000.
What moves your project within or above these ranges: slab condition (repair versus replacement), electrical service upgrade from 100-amp to 200-amp, fire separation assembly complexity on attached units, and utility trench length for detached structures. In North Hollywood specifically, we see higher costs on hillside lots north of Mulholland where grading and retaining wall requirements trigger, and lower costs on flat lots in the Valley Village area with straightforward utility access.
How to avoid overpaying: demand a written line-item quote before any design or construction work begins, verify that permit fees are included rather than estimated, and confirm that the quoted price includes all inspections and correction work. Ellery ADU Studio’s written price, per Haven Standard Clause 1, covers every element from feasibility study through certificate of occupancy; the only variables are owner-initiated changes after scope lock, which require a written change order with your signature. Call (424) 407-8266 for your free estimate and written price.
Garage Conversion ADU Near North Hollywood - Our Service Area
Ellery ADU Studio serves North Hollywood and surrounding communities including Studio City, Burbank, Van Nuys, Sherman Oaks, West Hollywood, Beverly Hills, Glendale, West Los Angeles, Northridge, Tarzana, and Los Angeles proper. Most North Hollywood properties receive feasibility assessment within 48 hours of contact, with permit set production beginning immediately upon written price acceptance. We’ve permitted garage conversions through LADBS offices in Van Nuys, Downtown, and West Los Angeles, and we understand the specific plan check preferences of each location. Whether your property sits in the NoHo Arts District, the residential flats near Victory Boulevard, or the hillside streets approaching Studio City, our team has documented existing conditions on comparable lots and can reference those records during your feasibility study.
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.
Frequently Asked Questions - Garage Conversion ADU in North Hollywood
A garage conversion ADU transforms an existing garage into a legally permitted dwelling unit with independent kitchen, bathroom, sleeping, and living facilities. In North Hollywood, this typically means converting a 400-600 square foot attached or detached garage into a rental unit, in-law suite, or home office with full residential amenities. Ellery ADU Studio handles the architectural design, structural engineering, permit submission, and construction under one contract at one written price. Call (424) 407-8266 for a free feasibility assessment.
Most garage conversion ADUs in North Hollywood reach certificate of occupancy within 8-14 months from contract signing, with permit set production taking 6-10 weeks and LADBS plan check adding 8-12 weeks depending on office workload. Construction typically runs 4-6 months for attached conversions and 5-7 months for detached conversions with utility trenching. Ellery ADU Studio’s permit set is the core product; a complete, accurate submittal reduces correction cycles and keeps your timeline predictable. Call (424) 407-8266 to discuss your specific property’s timeline.
Attached garage conversion ADUs in North Hollywood typically cost $95,000-$145,000 all-in; detached conversions run $125,000-$185,000; JADUs range $75,000-$125,000. Every project receives a written line-item price before any work begins, per Haven Standard Clause 1, with no change orders permitted without your signature. The price includes architectural drawings, structural calculations, MEP plans, permit fees, construction, inspections, and the 365-Day Done Right Promise. Call (424) 407-8266 for your written estimate.
Yes. Ellery ADU Studio specifies and coordinates Tuff Shed, James Hardie, Abodu, and Cover systems within our single-contract design-build model, producing permit sets that integrate these products with your existing property and local code requirements. Our crews are certified in James Hardie installation, and we’ve adapted Tuff Shed shells for residential use on multiple North Hollywood properties. Whether you own an existing structure from these manufacturers or want to explore prefab options for garage replacement, we can assess feasibility and provide a written price. Call (424) 407-8266 to discuss your specific system.
Garage conversion ADU construction is planned work, not emergency service, and Ellery ADU Studio does not promise same-day or dispatch-speed response for conversions, remodels, or additions. However, a live person answers calls 24/7 at (424) 407-8266 to schedule your feasibility assessment, answer questions about your project, or connect you with Nadia Ellery directly for complex situations. For active construction emergencies like water line breaks or electrical hazards, our project managers respond within two hours during business hours and coordinate next-day response for after-hours calls.
Every Ellery ADU Studio garage conversion is backed by the 365-Day Done Right Promise: if the finished ADU is not built to the permitted drawings, we make it right at our cost, documented in writing before your project starts. This covers workmanship, material installation, and code compliance. Manufacturer warranties on products like James Hardie siding or Tuff Shed components run separately and are transferred to you at project completion. The written warranty language is attached to your contract, not buried in fine print. Call (424) 407-8266 to review the exact terms.
Clear your garage of vehicles and large items so our team can measure slab dimensions, evaluate wall and roof conditions, and access electrical panels and utility meters. Gather your property survey or plot plan if available, and note any known issues like slab cracking, water intrusion, or previous unpermitted work. Ellery ADU Studio provides a free feasibility assessment that includes laser measurement, structural observation, and a written price within 48 hours of site visit. If you have an existing estimate from another provider, we offer a Free Second Opinion to identify scope gaps or overpricing. Call (424) 407-8266 to schedule.
Schedule Your Garage Conversion ADU Service in North Hollywood Today
Call (424) 407-8266 to schedule your free feasibility assessment and receive a written line-item price before any work begins. A live person answers 24/7. Nadia Ellery and the Ellery ADU Studio team have designed, permitted, and built over 900 ADUs since 2015, every one at a written price with a documented photo record and the 365-Day Done Right Promise. Your North Hollywood garage is already built; let’s make it work harder for you.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving North Hollywood since 2015.