ADU Construction in Corona del Mar
Serving 92625 and Newport Beach, Newport Coast, Laguna Beach
An accessory dwelling in Corona del Mar is not the back-garden building it is elsewhere, because on most of these lots there is no back garden left. What there usually is, is an alley, a garage at the end of it, and a first floor above that garage — which is where the honest version of this conversation starts.
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.
$25,000 White shaker cabinetry, white subway tile, and light quartz counters.
$30,000 A deep navy wall over textured white tile, with a floating walnut vanity and matte black fittings.
$35,000 A patterned encaustic-look floor, a sage shaker vanity and a glass shower with a tiled bench.
$72,000 Honey-oak cabinetry replaced with white shaker fronts and a marble-look quartz island.
$238,000 A walnut-fronted quartz island, arched openings, and sage-green stacked tile baths.
$275,000 A broad quartz island, a curved staircase with iron balusters, marble-look baths.
Second units where the lot is already full
Over the garage, not behind the house
The realistic unit here is built above or around existing alley-side structure rather than on open ground. That makes the structural survey the first piece of work rather than a later one: what is under the slab and how the existing walls are framed decides whether the idea is cheap, expensive or impossible.
Parking, access and the alley
Everything on these lots reaches the street through one route, and a second household reaches it through the same one. How cars, bins, bicycles and deliveries share that is worth drawing before anyone gets attached to a floor plan.
Two front doors on one narrow site
Privacy on a lot this tight is won with window placement and level changes rather than distance. Where the unit looks, what it overlooks, and what overlooks it are the questions that decide whether the arrangement is comfortable to live in for years.
The coastal layer is real but not mysterious
Work here sits inside the coastal zone, and the city administers that approval itself rather than referring it onwards. It is a second consent on the same project, best designed for from the first sketch instead of appealed against at the end.
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 Corona del Mar
Market estimate, not our own project data.
Talk to Onn about your Corona del Mar adu construction.
Free consult, no obligation. Onn reads every inquiry personally — and aims to reply within one business day.
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