ADU Construction in Huntington Beach
Serving 92646 · 92647 · 92648 · 92649 and Costa Mesa, Fountain Valley, Westminster
Tract lots in Huntington Beach are often regular and rectangular, which is a good starting point for a detached ADU — regular lots make setback arithmetic straightforward and leave fewer awkward leftovers. The variables that decide feasibility are usually existing coverage, rear access and where the services already run, not the shape of the parcel.
Real projects. Real prices.
73 finished remodels published with their final price — nothing hidden.
What our finished LA work actually cost: 27 kitchens ran $23k–$84k, median $50k; 28 bathrooms $28k–$105k, median $38k; 17 whole-home remodels $36k–$440k, median $150k. Real final prices from our own job records, not estimates.
$28,000 Stacked white tile and a blue patterned floor, with brushed brass fittings and a round mirror.
$34,800 White uppers over warm grey shaker lowers, white quartz, and a stainless chimney hood.
$56,000 Marble-look slab walls with matte black fittings and a backlit mirror over an oak vanity.
$84,000 Warm grey shaker cabinetry with quartz counters, plus floating vanities in dark stone tile.
$237,000 Deep green tile floor-to-ceiling, a farmhouse sink, living space open to the patio.
$279,000 White shaker cabinetry, granite counters, and a tan subway tile backsplash.
Adding a second unit to a tract lot
What decides feasibility
Setbacks, lot coverage, access for construction and the route for water, waste and power. On a regular lot these are usually resolvable; the point of checking early is to find the one that is not.
Coastal zone and new construction
A detached ADU is new construction. Inside Huntington Beach's coastal zone that means the city's certified Local Coastal Program is part of the picture, and the specific plan area matters. Inland addresses avoid this entirely.
Written by Onn Cohen-Meguri, founder and designer at Design Onn Point — 12+ years in business, 1,200+ finished Los Angeles projects. CSLB #1133368.
Pricing in Huntington Beach
Market estimate, not our own project data.
Talk to Onn about your Huntington Beach adu construction.
Free consult, no obligation. Onn reads every inquiry personally — and aims to reply within one business day.
From the blog
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