Detached ADUs, garage conversions, and Junior ADUs for Arleta homeowners across Woodman Avenue, Osborne Street, Terra Bella, and the Van Nuys Boulevard corridor. Flat lots. Clean LADBS permitting. No fire-zone overhead.
Hillstar Construction is a licensed Arleta ADU contractor. We've built detached ADUs, garage-conversion ADUs, above-garage units, and Junior ADUs (JADUs) for Arleta homeowners across the R1 streets between Woodman Avenue and Van Nuys Boulevard, along Osborne Street, Terra Bella, Branford, and the neighborhoods around Branford Park. Arleta is a neighborhood within the City of Los Angeles — not its own separate city — so ADU permits route through the Los Angeles Department of Building and Safety (LADBS).
What makes Arleta straightforward for an ADU is the lot stock itself: almost entirely flat valley-floor parcels, predominantly zoned R1, typically 5,000 to 7,500 square feet, many with original detached rear-yard garages, no hillside overlay, no historic-preservation district, and no Very High Fire Hazard Severity Zone. Every project starts with a free on-site visit, a written scope, and a straight answer about what your lot can actually support.
Arleta is one of the most ADU-friendly neighborhoods in the San Fernando Valley, and a lot of that is because of what Arleta is not. It is not on a hillside, so no Baseline Hillside Ordinance grading rules apply. It is not in a Very High Fire Hazard Severity Zone, so Chapter 7A Wildland-Urban Interface materials are not required. It is not inside an HPOZ, so no Cultural Heritage Commission review. And it is inside the City of Los Angeles, so LADBS standard plans and the Express Permit counter are available.
That combination makes an Arleta ADU among the simpler LA-area projects to design and permit. Most of the value a local contractor adds here is specific: knowing which blocks have alley access, which original detached garages need foundation reinforcement before conversion, and where utility trenching cleanly routes to LADWP service.
When a detached ADU isn't realistic — because of a tight side yard, an alley-access constraint, or a structurally borderline existing garage — a home addition or scoped whole-home remodel in Arleta is sometimes the cleaner path.
ADU rules for Arleta come from California state law plus the Los Angeles Municipal Code, administered by LADBS. These are the constraints that drive design decisions on a typical flat R1 Arleta parcel.
State law requires LADBS to allow a detached ADU of at least 850 sq ft for a studio or one-bedroom, or at least 1,000 sq ft for two or more bedrooms. On typical 5,000–7,500 sq ft Arleta R1 lots, an 800–1,000 sq ft detached unit usually fits the rear yard comfortably.
State law limits required side and rear setbacks to four feet for a new detached or attached ADU. No setback is required where you convert an existing garage inside its original footprint — the common path on Arleta lots with alley-access rear garages.
Arleta is in the City of Los Angeles, so permits go through LADBS. State law requires completeness within 15 business days and approval within 60 days on a complete application. LADBS standard plans and the Express Permit counter can shorten turnaround on standard Arleta lots.
State law exempts most ADUs from added on-site parking where the lot is within a half-mile walk of public transit. Most of Arleta sits in that buffer because of Metro service on Woodman, Van Nuys, and Osborne — so parking rarely constrains the design.
An Arleta ADU typically connects to existing LADWP water and power service for the primary home — with separate metering optional. Sewer capacity on most R1 streets is adequate. We coordinate LADWP, sewer, and gas with LADBS plan check as a single workflow.
Arleta is flat valley floor — not in a Very High Fire Hazard Severity Zone and not inside the city's Baseline Hillside Ordinance area. That means no Chapter 7A ignition-resistant materials and no hillside grading rules. Arleta ADUs typically build faster and at lower cost than foothill projects.
Arleta R1 lots are typically 5,000 to 7,500 square feet, flat, and across most of the neighborhood come with original detached rear-yard garages accessed from the alley. That stock makes three ADU types especially common:
The most common Arleta configuration. An 800–1,000 sq ft detached unit in the rear yard, with four-foot side and rear setbacks, typically fits comfortably while preserving the primary home's backyard. Alley-access lots read particularly clean — the ADU gets its own entry off the alley, independent of the primary home's street frontage.
A strong option on Arleta lots with original detached rear-yard garages — which is most of the neighborhood's R1 inventory. State law allows conversion with no required setback from the existing footprint, shortening LADBS permitting. We verify slab, foundation, framing, and drainage first; older garages sometimes need footing or shear reinforcement.
Works where the yard is tight but an existing detached garage footprint can carry a second-story habitable unit within state setback and height rules. Less common than detached or garage-conversion paths but a clean fit on specific properties.
A JADU is carved out of the existing primary home — up to 500 sq ft — with its own entrance and efficiency kitchen. Often the right answer where the rear yard is already accounted for, or where a broader home remodeling project is already underway and a JADU fits the reworked floor plan. JADUs continue to have owner-occupancy requirements under state law.
A realistic Arleta ADU timeline from first site visit to certificate of occupancy is roughly 7 to 11 months — at the efficient end of the LA-area range because there are no hillside or fire-zone review layers.
Zoning, setback, and existing-garage-condition check at your property. Straight answer on what your lot can actually support — no obligation.
Floor plans, elevations, site plan, and a written scope with a clear price. Decisions on detached new-build vs. garage conversion vs. JADU happen here.
We submit to LADBS — standard plans or Express Permit where applicable. State law: 15 business days to completeness, 60 days to approval on a complete application.
Typical build is 3–6 months for a garage conversion, 4–6 months for a detached new-build. Direct access to your project manager from kickoff to certificate of occupancy.
Hillstar was great! We did a garage conversion and Lior was the best. He helped us plan every detail.
— Jeffrey Rhodes, January 2019Lior was such a pleasure to work with for our guest house remodel. He was so easy to get in touch with, incredibly responsive and finished the job early.
— Amy Christine, February 2019Straight answers to the questions we hear most often before the first site visit.
Most Arleta lots qualify. California state law (Government Code §65852.2) requires the City of Los Angeles to allow at least one ADU on single-family residential lots, and Arleta is predominantly zoned R1 single-family with smaller R2 and mixed-use pockets along Van Nuys Boulevard, Woodman Avenue, and Osborne Street. Typical Arleta lot sizes of roughly 5,000 to 7,500 square feet support a detached new-build ADU, a garage conversion, or a JADU on most properties. Arleta is flat valley floor, not a hillside or historic-preservation overlay area, so the lot-by-lot complexity is low. What changes per lot is the type and size of ADU that fits — not whether you can build one.
Arleta is a neighborhood within the City of Los Angeles, so ADU permits go through the Los Angeles Department of Building and Safety (LADBS). State-law timelines apply: LADBS must determine application completeness within 15 business days and approve or deny a complete ADU application within 60 days. LADBS publishes ADU standard plans and runs a streamlined Express Permit counter that can shorten turnaround on simple projects — a particularly useful path on standard flat Arleta R1 lots. We handle the LADBS submittal, plan-check corrections, utility coordination with LADWP, and final inspection — end to end.
Very often, yes — and garage conversion is one of the most common ADU paths in Arleta because so many original Arleta homes were built with detached rear-yard garages accessed from the alley. State law allows garage-to-ADU conversions with no required setback from the existing structure's footprint, which shortens LADBS permitting versus a new detached build. We verify the existing slab, foundation, drainage, and structural condition first. Older Arleta garages sometimes need reinforcement — footings, framing, or shear — to carry habitable-use loads and meet current energy code.
State law requires LADBS to allow a detached ADU of at least 850 square feet for a studio or one-bedroom, or at least 1,000 square feet for two or more bedrooms. Larger envelopes are generally achievable on suitable lots. On typical 5,000 to 7,500 square-foot Arleta R1 lots, a well-designed 800 to 1,000 square-foot detached ADU usually fits the rear yard comfortably. Because Arleta lots are flat and not in a hillside overlay, the buildable envelope is cleaner than on foothill parcels — lot area and setbacks drive the size, not grading.
No. Arleta sits on the flat San Fernando Valley floor and is not in a Very High Fire Hazard Severity Zone. That means the Chapter 7A Wildland-Urban Interface ignition-resistant building requirements — ignition-resistant siding, ember-resistant vents, Class A roof, tempered glazing — that apply on foothill parcels do not apply on a standard Arleta ADU. It's one of the reasons an Arleta ADU typically builds faster and cheaper than a foothill or hillside project.
Yes. California state law expressly allows ADUs to be rented as independent dwellings on single-family residential lots, and Arleta is a strong local rental market because of its central Valley location, the Metro bus service along Woodman Avenue and Van Nuys Boulevard, and freeway access via the 5, 170, and 118. There is no citywide minimum lot size or owner-occupancy requirement on a standard ADU under state law. Junior ADUs (JADUs) — the up-to-500-square-foot units carved out of the primary residence — do continue to carry an owner-occupancy requirement. Short-term rental rules in the City of Los Angeles are a separate ordinance; we can walk through what applies if a short-term rental is on the table.
No surprise change orders unless construction uncovers something that genuinely requires one. Direct access to your project manager from kickoff to certificate of occupancy.
CSLB #972213. Design, permitting, construction, and final inspection under a single license — not a network of subs you have to coordinate.
LADBS submittal, plan-check corrections, and LADWP utility coordination run in-house. You don't chase plans between an architect and a separate permit expediter.
Every inquiry gets a real answer within 24 hours. Every project gets a named project manager you can reach directly — not a call center.
17 reviews, 5.0-star average. Every project from first site visit through final inspection is the same licensed team, start to finish.
Building outside Arleta too? Tap a nearby neighborhood for local details:
Pacoima· North Hollywood· Valley Village· Studio City· Sherman Oaks· Los Angeles (citywide)
We handle more than one project type in Arleta. Explore related services for your home: