Designing, permitting, and building detached ADUs, garage conversions, and Junior ADUs for Pacoima homeowners across El Cariso, Hansen Dam, the Foothill Boulevard corridor, Van Nuys Boulevard, and Paxton Street. LADBS submittals handled in-house. CSLB License #972213.
Hillstar Construction is a licensed Pacoima ADU contractor. We've built detached ADUs, garage-conversion ADUs, above-garage units, and Junior ADUs (JADUs) for Pacoima homeowners across El Cariso Village, Hansen Dam, Paxton Street, Terra Bella, Van Nuys Boulevard, Foothill Boulevard, and the streets east of Laurel Canyon Boulevard. Pacoima 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), the same department that handles the rest of the San Fernando Valley's LA-City neighborhoods. What makes Pacoima different is the stock itself: predominantly R1 single-family lots, many with original detached rear-yard garages accessed from the alley, and lot sizes that land right in the sweet spot for an affordable, rentable ADU.
Every project starts with a free on-site consultation, a clear written scope, and a straight answer about what your lot can actually support — including a zoning, setback, fire-zone, and garage-condition check at visit one.
Pacoima is an ADU-friendly neighborhood. Lot sizes in the R1 residential streets — roughly 5,000 to 7,500 square feet is the typical range — are large enough to support a 800 to 1,000 square-foot detached ADU in the rear yard without crowding the primary house, and the neighborhood's rental demand, transit access along Van Nuys Boulevard, and freeway access via the 5, 118, 170, and 210 make it a strong location for a long-term rental ADU or a family guest suite. A contractor who understands the Pacoima stock — where the alley access is, which streets have active Metro bus lines, where the older wood-framed garages need foundation reinforcement before conversion — avoids surprises that cost time and money after LADBS plan check.
We build Pacoima ADUs to respect the character of the neighborhood: the wood and stucco single-story ranch and minimal-traditional homes that dominate the R1 streets, the Spanish Colonial Revival on the older blocks near the historic core, and the mid-century tract homes around El Cariso Village and Hansen Dam. The ADU should read as part of the property — not an out-of-scale infill unit that clashes with the street.
When a detached ADU isn't realistic — because of a tight side yard, alley-access constraints, a structurally borderline existing garage, or a parcel that hits the Lopez Canyon / Kagel Canyon fire-zone edge — a home addition or scoped whole-home remodel in Pacoima is sometimes the cleaner path.
ADU rules for Pacoima come from California state law plus the Los Angeles Municipal Code, administered by LADBS. The baseline rules below apply to virtually every Pacoima lot. The specific envelope on your property depends on zoning (R1, RA, or a mixed-use corridor along Van Nuys Boulevard), setbacks, lot geometry, and fire-zone designation on the northern foothill edge — all of which we confirm at the first site visit.
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 Pacoima lots, subject to local standards at plan submittal. On typical 5,000 to 7,500 square-foot R1 lots, a well-designed 800 to 1,000 square-foot detached ADU usually fits the rear yard with room for off-street parking access.
State law limits required side and rear setbacks to no more than four feet for a new detached or attached ADU. No setback is required where you convert an existing garage to an ADU in its existing footprint — the common path on Pacoima lots with original alley-access garages.
Pacoima is a neighborhood within the City of Los Angeles, so ADU permits go through LADBS. State law requires LADBS to 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 an Express Permit counter for simpler projects, which can shorten turnaround versus a full custom submittal. The Los Angeles area permit guide covers the full LADBS permit flow end to end.
State law generally exempts ADUs from added on-site parking where the lot is within one-half mile walking distance of public transit, among other exemptions — and much of Pacoima sits inside that transit buffer because of Metro bus service along Van Nuys Boulevard, Laurel Canyon Boulevard, and San Fernando Road. That exemption removes a common ADU design constraint on smaller Pacoima lots.
An ADU in Pacoima usually connects to the existing LADWP water and power service for the primary home — with separate metering optional depending on how the ADU will be used. Sewer capacity on most Pacoima R1 streets is adequate for an added ADU. We coordinate LADWP, sewer, and gas service with the LADBS plan check as a single workflow.
Most of Pacoima sits on the flat valley floor and is not in a Very High Fire Hazard Severity Zone. Parcels on the northern edge of the neighborhood near Lopez Canyon, Kagel Canyon, and parts of the El Cariso area can fall inside a VHFHSZ and are treated as Wildland-Urban Interface (WUI) under Chapter 7A — ignition-resistant siding and soffits, dual-pane tempered or multi-pane glazing, ember-resistant vents, Class A roof assembly. We confirm your parcel's fire-zone classification at the first site visit; most Pacoima parcels are not affected.
Pacoima R1 lots are typically 5,000 to 7,500 square feet, mostly flat, many with original detached rear-yard garages accessed from the alley. That stock makes three ADU types especially common and one — the above-garage carriage-house unit — a good fit on specific properties:
The most common Pacoima configuration. An 800 to 1,000 square-foot detached ADU in the rear yard, with four-foot side and rear setbacks, typically fits comfortably on a standard Pacoima R1 lot while preserving the primary home's backyard. Alley-access lots are particularly clean: the ADU reads as a secondary rear-yard structure with its own entry off the alley, independent of the primary home's curb-facing street.
A strong option on Pacoima lots with original detached rear-yard garages — which is most of the neighborhood's R1 inventory. State law allows a garage-to-ADU conversion with no required setback from the existing footprint, which shortens LADBS permitting. We verify the slab, foundation, framing, and drainage condition first — older Pacoima garages sometimes need footing or shear reinforcement to carry habitable-use loads and meet current energy code.
Works on Pacoima lots where the yard is tight but the existing detached garage footprint can carry a second-story habitable unit within state setback and height rules. Less common than the 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 square feet — with its own entrance and efficiency kitchen. Often the right answer on Pacoima lots where the rear yard is already accounted for by a pool or mature landscaping, or where a broader home remodeling project is already underway and a JADU fits inside the reworked floor plan. JADUs continue to have owner-occupancy requirements under state law.
A realistic Pacoima ADU timeline from first site visit to certificate of occupancy is roughly 7 to 12 months — faster than hillside or historic-district builds because most Pacoima parcels are flat, standard-zoned R1, not in a fire zone, an…
Zoning, setback, lot-condition, and feasibility check on 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.
Direct access to your project manager from kickoff to certificate of occupancy. No surprise change orders unless construction uncovers something that genuinely requires one.
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 Pacoima 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 Pacoima is predominantly zoned R1 single-family with smaller R2 and R3 pockets along Van Nuys Boulevard, San Fernando Road, and Foothill Boulevard. Typical Pacoima 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. What changes per lot is the type and size of ADU that fits — not whether you can build one. We confirm exact zoning, setbacks, fire-zone status for lots near Lopez Canyon or the Kagel Canyon foothills, and any hillside designation during the first site visit.
Pacoima 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 has ADU standard plans and a streamlined Express Permit counter that can shorten turnaround on simple projects. 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 Pacoima because so many original Pacoima 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 Pacoima 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. The realistic size on your specific Pacoima property depends on lot area, existing structures, side and rear yard depth, setbacks, and — for a two-story ADU — the city's side-yard articulation and privacy rules. On typical 5,000 to 7,500 square-foot Pacoima R1 lots, a well-designed 800 to 1,000 square-foot detached ADU usually fits the rear yard comfortably.
Most of Pacoima sits on the flat San Fernando Valley floor and is not in a Very High Fire Hazard Severity Zone. However, properties on the northern edge of the neighborhood near Lopez Canyon, the Kagel Canyon foothills, and parts of the El Cariso area can fall inside a VHFHSZ and are treated as Wildland-Urban Interface (WUI) under Chapter 7A of the California Building Code. Where that applies, the ADU must be built with ignition-resistant exterior materials, dual-pane tempered or multi-pane glazing, ember-resistant vents, and a Class A roof assembly. We confirm your specific parcel's fire-zone classification at the first site visit.
Yes. California state law expressly allows ADUs to be rented as independent dwellings on single-family residential lots, and Pacoima is a strong local rental market because of its central Valley location and transit access along Van Nuys Boulevard and the 5, 118, and 210 freeways. 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, in-house submittal, plan-check corrections, and 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.
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