New Detached ADU in Inglewood - Plans, Permits & Build, One Fixed Price

Fast, Reliable New Detached ADU Across Inglewood

A new detached ADU in Inglewood typically runs $285,000-$485,000 all-in, from permit set through final inspection, with studio units at the lower end and two-bedroom units at the upper. Most projects take 8-14 months depending on whether the lot falls inside the LAX 65 dB CNEL noise contour and whether the existing electrical service needs full replacement. We’re Nadia Ellery’s team at Ellery ADU Studio West Hollywood, and we coordinate design, permitting, and construction from our Los Angeles office with crews working Inglewood daily. Call (213) 329-7167 for a written price before any work starts.

Call (213) 329-7167

Inglewood’s lots - mostly 5,000-7,000 sq ft parcels with 1940s-1960s stucco bungalows and single-car garages - are exactly the size and type that California’s ADU laws were written for. But they’re also old enough that nearly every one needs electrical, plumbing, and drainage work a newer lot wouldn’t. That’s where local experience shows up in the permit set and in the final number.

Why Ellery ADU Studio West Hollywood Is Inglewood’s Preferred New Detached ADU Company

We’ve designed, permitted, and built 900+ ADUs since 2015, the year California’s ADU laws shifted, and a growing share of those are in Inglewood specifically. Homeowners near Hollywood Park, on the north side of Century Boulevard, and along the Prairie Avenue corridor call us back because we check the CNEL contour map before we spec windows, not after the plan set is drawn.

Our Inglewood clients receive a documented photo record on every site visit, a written price locked under Haven Standard Clause 1 before any work begins, and the 365-Day Done Right Promise in writing. No designer-versus-builder blame gap. No change orders after signing.

Dispatch and scheduling are coordinated from our Los Angeles office, and crews serve Inglewood with the same daily frequency as our closer-in projects. Response to initial calls is same-day; a live person answers 24/7.

We also offer a Free Second Opinion on any written estimate already in hand from another firm - a service Inglewood homeowners use frequently after discovering their quote didn’t account for FAA noise-contour glazing or electrical service upgrades.

Our New Detached ADU Services in Inglewood

Custom Built ADU

Custom built ADUs in Inglewood start around $320,000 for a studio footprint and climb to $485,000 for a two-bedroom with full kitchen and laundry. Every custom project begins with a site survey that checks three things: the LA County CNEL noise contour line (which determines whether your unit needs STC-rated glazing and mechanical ventilation), the existing electrical service capacity, and the lot’s drainage pattern. We once found a 1948 bungalow on North Prairie Avenue where the low corner of the lot pooled water in winter rains - a detail that changed our foundation spec and added a graded pad with perimeter drainage. That kind of find is why we walk the lot before we draw.

Prefab ADU Installation

Prefab systems from Abodu and Cover can compress the construction timeline for Inglewood homeowners, but the site prep doesn’t shrink. The module still needs a graded foundation, new electrical service, and - if you’re inside the 65 dB CNEL contour - STC-rated glazing that meets California’s sound-attenuation standards for habitable space. We specify and coordinate these brands under the same single contract that covers design and permitting, so the module manufacturer, our crew, and the city inspector are all working from one permit set. Typical prefab installs in Inglewood run $285,000-$395,000 depending on module size and site complexity.

Modular ADU

Modular construction suits Inglewood’s tighter lots where staging space is limited and neighbors are close. Dvele and Mighty Buildings units arrive with finishes installed, which cuts on-site construction time and noise complaints. But modular still requires the same utility rough-ins and foundation work as site-built, and in Inglewood that almost always means upgrading from the original 60-100 amp service to 200 amps and running new water and sewer lines to the detached location. We handle those utility scopes in-house, not through subcontractors, so the modular delivery date and the site readiness date actually align.

Studio ADU

Studio ADUs are the most common detached unit we build in Inglewood, especially for homeowners targeting event-night rental income from SoFi Stadium and Intuit Dome. A 400-600 sq ft studio with kitchenette, full bath, and separate entrance typically runs $285,000-$365,000. The compact footprint fits comfortably on a 5,000 sq ft lot while preserving the existing garage and required setbacks. For the Hollywood Park-adjacent owner who wants to list on event weekends, we spec durable finishes and sound-attenuated construction that holds up to tenant turnover. Our New Detached ADU team has delivered dozens of these units specifically for the Inglewood rental market.

1-Bed & 2-Bed ADU

One-bedroom detached ADUs in Inglewood range from $340,000-$420,000; two-bedroom units run $395,000-$485,000. The jump in price isn’t just square footage - it’s the second means of egress, the larger electrical and HVAC load, and the more complex plumbing layout. On Inglewood’s standard 50′ x 100′ or 60′ x 100′ lots, a two-bedroom unit requires careful setback calculations to avoid encroaching on the rear yard or side property lines. Our permit set includes a full site plan showing compliance with Inglewood’s zoning, not just a floor plan.

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Trusted Brands We Service in Inglewood

We specify and coordinate prefab and modular systems from Abodu, Cover, and Dvele within the same single contract that covers our custom builds. James Hardie siding is our default exterior specification for site-built units in Inglewood because it holds up to the LAX flight-path vibration and the salt air drifting inland. These aren’t brands we mention and outsource - we coordinate delivery, crane scheduling, and finish integration ourselves, so the written price covers the complete build, not just the module.

Common New Detached ADU Problems We See in Inglewood Homes

• FAA noise contour surprises. Contractors who don’t check the LA County CNEL map before drawing plans spec standard operable windows, then fail inspection when the site is confirmed inside the 65 dB line. We check the contour in our first site survey and spec STC-rated glazing with mechanical ventilation from the start.
• Electrical service undersized for detached load. Most Inglewood bungalows and their detached garages were built with 60-100 amp service. A modern ADU with electric heat, hot water, laundry, and kitchen appliances needs 200 amps. We scope the service upgrade in the original quote, not as a change order after drywall is up.
• Drainage ignored on flat lots. The 1940s-1960s grading in neighborhoods north of Century Boulevard often pooled water at the rear of the lot. A slab poured without addressing this collects moisture and cracks. Our site prep includes grading and perimeter drainage to keep the new foundation above the water line.
• Setback miscalculations on paper. A detached ADU on a 5,000 sq ft lot needs precise measurement of existing structures, property lines, and required rear-yard open space. We’ve seen plans drawn from outdated assessor maps that didn’t account for a garage addition built in the 1970s, triggering a costly redesign.

Pricing for New Detached ADU in Inglewood, CA

We Also Serve Cities Near Inglewood

Our crews work throughout the Los Angeles basin, including Inglewood neighbors in Culver City, Los Angeles, Santa Monica, and West Hollywood. Each city’s permitting path, noise contours, and utility infrastructure differ, and our permit sets reflect those specifics rather than using a single template.

FAQs - New Detached ADU in Inglewood