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(818) 297-7660Sean@McDermott.LA

Built from
the ground up.

Custom homes and ground-up builds across Southern California — one accountable contractor from raw land and design through foundation, framing, systems, and the final coat of paint.

New Construction

Custom homes & ground-up builds.

A new build is the ultimate test of a builder. There's no existing structure to hide behind — every line, every system, and every finish is ours to get right, from the first survey stake to the day you get the keys.

We self-perform core trades and manage every subcontractor directly, so quality and schedule never get lost in handoffs. You get one team, one point of contact, and a home built right the first time — to last.

A new foundation being poured — rebar grid and formwork on a ground-up McDermott Construction build

Our Process

From land to keys.

A clear, milestone-driven path — so you always know what's next and what it costs.

01

Design & Pre-Construction

We align on vision, scope, and budget, coordinate architecture and engineering, and build an honest, detailed estimate before a shovel moves.

02

Permits & Approvals

We navigate the city, county, HOA, and coastal or hillside review process, and pull every permit so the build starts clean and legal.

03

Site Work & Foundation

Grading, utilities, and drainage, then engineered footings and a poured foundation — the base everything else depends on, done to spec.

04

Framing & Structure

The home takes shape — framing, structural steel where needed, roof, windows, and a weather-tight shell ready for systems.

05

Systems & Weatherproofing

Plumbing, electrical, HVAC, insulation, and waterproofing — the parts you never see, installed and inspected to last decades.

06

Finish & Handover

Millwork, stone, cabinetry, floors, and paint — a tight punch list, a clean site, and a warranty we stand behind.

McDermott Construction truck and jobsite banner at a ground-up build

What We Build

Ground-up, at any scale.

From a single custom residence to an income-producing ADU or a ground-up commercial space — if it starts with bare land, we can build it.

Custom homes

Ground-up residences designed and built around how you live.

ADUs & guest houses

Detached units and conversions that add space and value.

Additions & second stories

Expanding a home's footprint without losing its character.

Ground-up commercial

Restaurants, retail, and mixed-use built from the slab up.

Have Land or a Plan?

Let's build it right.

Tell us about your site and your vision — we'll walk the property and put together an honest plan and estimate.