Custom kitchen remodel with waterfall island by Obsidian United Developments
Luxury Residential & Commercial Construction

Built on experience.
Designed for life.

Obsidian United Developments is a licensed California Class B general contractor specializing in luxury remodeling and custom construction for Orange County and Los Angeles County, with service across Southern California.

☰Licensed
Class B
◆Bonded
✓Insured
Kitchen RemodelingBathroom RemodelingWhole Home RemodelingHome AdditionsADUsCustom HomesCommercial Construction
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Obsidian United Developments Inc.
Our Story

A legacy of craftsmanship.

Take a couple minutes to hear what Obsidian United Developments is built on.

✓Licensed Class BCSLB License #1084732
◆Bonded & InsuredFully covered on every project
●Family OwnedConstruction Company
★39+ Years ExperienceHands-on Construction Experience
🔧Quality CraftsmanshipEvery detail, checked twice
What We Build

Every project, one standard.

From a single bathroom to a ground-up custom home, the same crew, the same estimate discipline, and the same finish quality carry through.

Kitchen remodeling
KitchensRemodeling
 Bathroom remodeling
BathroomsRemodeling
 Whole home remodeling
Whole HomeRemodeling
 Home additions
AdditionsNew Space
 Accessory dwelling units
ADUsAccessory Units
 Custom home construction
Custom HomesGround-Up
Commercial Construction
CommercialTenant Improvements
 Decorative concrete and hardscape
Concrete& Hardscape
Recent Work

A few from the field.

Real projects, photographed on-site.

Kitchen remodelKitchen Remodel
Bathroom remodelBathroom Remodel
Concrete patio and hardscapeConcrete & Hardscape
Custom walk-in closetCustom Closet
See Full Portfolio
39+ Years

Building our reputation one project at a time. Read our story →

How It Works

Six steps, no surprises.

01

Consultation

We listen to your vision and walk the space with you before anything gets scoped.

02

Estimate

A detailed proposal with transparent, itemized pricing — not a ballpark guess.

03

Design

Plans, selections, and material guidance to get every detail right before we build.

04

Permits

We handle all permitting, so you're not stuck navigating the city on your own.

05

Construction

Quality craftsmanship on every detail, with scheduled milestones and weekly updates.

06

Final Walkthrough

A final walkthrough against the original scope, ensuring complete satisfaction.

Why Choose Us

What sets Obsidian apart.

01

Licensed Class B

CA General Contractor License #1084732, bonded and insured on every project.

02

Quality Craftsmanship

Details checked twice, on every job, not just the showcase projects.

03

Premium Materials

We spec materials that hold up, not just materials that photograph well.

04

Reliable Communication

One point of contact, weekly updates, no chasing down your own contractor.

05

Professional Project Management

Scheduled milestones and a foreman on-site from start to finish.

06

Family Owned

Decades of hands-on fieldwork behind every estimate we write.

Family Owned · Licensed California Class B General Contractor

Every project, personally overseen.

Founder

Sergio Mendez

39+ years of hands-on construction experience. Sergio personally oversees every project to make sure it reflects the same standards that have defined his career for nearly four decades.

Philosophy

Do the job right the first time.

Build with integrity. Communicate honestly. Never compromise quality. Treat every home with respect — the standard behind every Obsidian United project.

Meet the Founder
Careers

We're hiring across Orange County & LA County.

Lead Carpenters, Superintendents, Project Managers, and skilled trades — join a growing, family-owned crew.

View Openings
Financing

Financing options available for qualified projects.

Ask us during your consultation about current financing partners and terms.

Ask About Financing
Free Resource

Download our project planning guide

What to expect at every phase, from consultation to final walkthrough — useful before your first call with any contractor.

Get the Guide
Get Started

Tell us what you're building.

Send a few details about the project and we'll follow up to schedule a walkthrough and put together your estimate.

Request Consultation (951) 536-8062
Request Consultation