New Detached ADU in Van Nuys - Design, Permits and Build Under One Contract

Fast, Reliable New Detached ADU Across Van Nuys

A new detached ADU in Van Nuys typically costs $220,000-$420,000 all-in, from permit-ready drawings through final inspection, with most projects completing in 8-14 months depending on utility complexity and whether you choose custom stick-built or prefab assembly. Ellery ADU Studio has designed, permitted, and built 900+ ADUs since 2015, and our Los Angeles office dispatches crews directly to Van Nuys parcels daily. Call (747) 322-4648 to schedule your free estimate with a written price before any work starts, guaranteed under Haven Standard Clause 1.

Call (747) 322-4648

Van Nuys homeowners face a specific permitting advantage that neighboring Valley cities do not. Because Van Nuys sits inside the City of Los Angeles rather than a separately incorporated municipality, your detached ADU can move through LA’s Standard Plan ADU program for expedited permit review. You can also pair that detached unit with a Junior ADU inside your main house on the same parcel, a combination that would require separate variance processes in Burbank or Glendale just across the Valley. Our New Detached ADU team handles both the permit set and construction under one contract, so no designer-builder blame gap can derail your project.

Why Ellery ADU Studio Burbank Is Van Nuys’s Preferred New Detached ADU Company

We know the Van Nuys housing stock because we measure it. The 1945-1970 single-family ranch homes on 6,000-8,500 sq ft lots dominate this neighborhood, and the majority carry detached one- or two-car garages that make natural ADU candidates. But a garage conversion is not a new detached build. When you’re adding square footage on open ground behind the house, the foundation, grading, and utility trenching scope changes completely. We scope that correctly from the first site visit.

Our crews serve Van Nuys locally from our Los Angeles office, and we maintain a documented photo record on every visit so you see what we found, not what we felt. Under Haven Standard Clause 5 (No Surprises), your scope locks at signing. No door-side upsells. No scope creep.

We have completed projects near the G Line busway corridor where transit-adjacent parking waivers removed the single largest cost barrier to ADU construction in this garage-heavy postwar neighborhood. Our 365-Day Done Right Promise is backed in writing before your project starts: if the finished ADU is not built to the permitted drawings, we make it right.

A live person answers our phones 24/7. We also offer a Free Second Opinion on any written estimate already in your hand.

Our New Detached ADU Services in Van Nuys

Custom Built ADU

Custom stick-built detached ADUs in Van Nuys typically run $280,000-$420,000 all-in, drawings through final inspection. This path makes sense when your lot has irregular dimensions, significant grade change, or you need a 2-bedroom layout over 800 sq ft that prefab modules cannot accommodate. We design the permit set in-house, pull LA City permits under the Standard Plan program where eligible, and build with our own crews. On a recent project near the Van Nuys Golf Course, we engineered a stepped foundation to handle the gentle slope common to lots south of Victory Boulevard, then specified a Title 24 envelope with R-19 walls and R-38 roof assembly to meet inland Valley requirements.

Prefab ADU Installation

Prefab ADU installation in Van Nuys typically runs $220,000-$340,000 all-in, including site prep, foundation, utility trenching, and module set. We specify and coordinate systems from Abodu, Cover, and Dvele within the same single contract that covers your permit set and construction. The key variable in Van Nuys is staging access: many lots on the 6,000 sq ft standard have narrow side yards between the main house and property line, so we crane the modules over the existing structure or coordinate street closure permits for a roll-in set. We scope this access path before quoting, not after.

Modular ADU

Modular construction in Van Nuys follows the same permit pathway as site-built but arrives as factory-completed volumetric units. This works well on flat lots with clear rear access from an alley or wide driveway, common in the grid sections north of Victory. Foundation and utility rough-in happen first; modules arrive weather-tight and finish-connected. We coordinate the manufacturer’s delivery window with LA City inspection scheduling so you’re not paying for crane rental on standby.

Studio ADU

Studio ADUs - 350-500 sq ft, single open plan with kitchenette and bath - are the most common detached ADU we build in Van Nuys. They typically run $220,000-$310,000 all-in. We built a custom 500 sq ft detached studio ADU in the Van Nuys area near the G Line busway, where the transit corridor waived replacement parking and let us skip a two-car garage replacement. The lot’s 100-amp panel and galvanized supply line had to be upgraded before final, and we specified a higher-R-value Title 24 envelope and a beefier mini-split to hold up to Valley heat past 100°F. Because it was a true new build on an open rear pad, we set the foundation, drainage, and utility trenching around the staging footprint before the prefab modules arrived.

1-Bed & 2-Bed ADU

1-bedroom detached ADUs in Van Nuys typically start around $260,000; 2-bedroom units with full kitchen and separate HVAC zone typically run $320,000-$420,000. These layouts trigger LA City’s more stringent parking and open-space requirements, so we verify your parcel’s zoning and lot coverage before the permit set begins. Many Van Nuys lots carry RD or R2 overlays that actually expand what you can build compared to standard R1, a detail we check on every site survey.

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Trusted Brands We Service in Van Nuys

We specify and coordinate prefab and modular systems from Abodu, Cover, and Dvele within the same single contract that covers your design, permitting, and site construction. This means we handle manufacturer communication, delivery logistics, and LA City inspection coordination - not you. Our familiarity with each brand’s connection details and utility rough-in requirements lets us price the full project accurately before work starts, per Haven Standard Clause 1. No “call for a quote.” No allowance items that balloon later.

Common New Detached ADU Problems We See in Van Nuys Homes

• Assuming a garage conversion path when the job is actually a new detached build on open ground. This changes foundation, grading, and utility trenching scope from day one. We see this confusion most often on Van Nuys lots where the detached garage was demolished years ago, leaving a flat pad that looks like a build-ready site but needs full geotechnical review and new utility trenching to the main house.
• Sizing the mini-split and Title 24 envelope for coastal LA weather instead of Van Nuys inland heat loads. Van Nuys recorded 119°F in 1971, California’s all-time high for a populated area. Title 24 energy compliance for new ADU construction here consistently demands higher insulation R-values and more robust mini-split capacity than equivalent projects in West LA or the South Bay. Contractors who spec for Santa Monica weather fail inspection or leave you with an underperforming unit.
• Missing the R2/RD zoning overlay or transit-corridor parking waiver on the parcel. A significant share of Van Nuys lots carry these classifications, which - combined with LA City’s ordinance allowing a JADU plus a detached ADU on the same parcel - means experienced local contractors routinely scope dual-unit ADU projects. Miss this and you either redesign unnecessarily or pay for a variance you never needed.
• Undersizing electrical service upgrades for 1950s ranch panels. Most Van Nuys homes of this era run original 100-amp panels with galvanized supply lines. Any detached ADU with full kitchen, laundry, and HVAC requires a 200-amp service upgrade and new copper lateral. We price this in from the start; contractors who treat it as a “maybe” change order hit you later.

Pricing for New Detached ADU in Van Nuys, CA

We Also Serve Cities Near Van Nuys

Our crews work throughout the San Fernando Valley and adjacent communities. We also build new detached ADUs in Sherman Oaks, Studio City, North Hollywood, and Encino. Each city carries its own permitting authority - LA City for most, with separate processes for Burbank and Glendale - and we adjust our permit strategy accordingly. Dispatch and scheduling are coordinated from our Los Angeles office.

FAQs - New Detached ADU in Van Nuys