ADU Construction in Manhattan Beach
Serving 90266 and Hermosa Beach, El Segundo, Redondo Beach
State ADU law made accessory units far easier across California. In Manhattan Beach the limiting factor is rarely the law — it is that the lot is small and the existing house already occupies much of it. The honest first question is whether there is genuinely room.
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 full-length double vanity under twin lit mirrors, with herringbone mosaic shower niches.
$45,000 Rust and blue slate-tone tile over a pebble mosaic shower floor, with bronze fittings.
$75,000 Rift-oak flat-panel cabinetry with white uppers, a quartz island and a fluted tile backsplash.
$242,700 Structural work to open up the space, a vaulted ceiling, solid wood floors, kitchen and two baths.
$250,000 White shaker cabinetry and veined quartz, with hex-mosaic walk-in showers.
ADUs where land is the scarce thing
Room is the binding constraint
Setbacks, existing coverage and access decide feasibility here, and on a compact parcel they decide it quickly. It is better to establish that in an afternoon than after a designer has been paid.
Conversion often beats new build
Where there is no room for a detached unit, converting existing structure is frequently the better use of the same budget. It is not a consolation prize on a lot this size; it is usually the sensible answer.
Parking is part of the arithmetic
Where street parking is already tight, what happens to on-site parking matters to how the property works day to day. It is worth deciding deliberately alongside the unit design rather than treating it as a detail to resolve later.
What the unit is honestly for
A guest suite, a rental and a place for a family member are three different buildings with three different layouts. On a small lot there is no room for a design that tries to be all three, so the answer is worth settling first.
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 Manhattan Beach
Market estimate, not our own project data.
Talk to Onn about your Manhattan Beach adu construction.
Free consult, no obligation. Onn reads every inquiry personally — and aims to reply within one business day.
From the blog
ADU vs Garage Conversion: Which Adds More Value in LA?
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LA County Kitchen Permits Explained (2026 Edition)
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