Commercial General Contractor Serving Southern California — Since 1991.
Vlahos Construction builds offices, retail centers, industrial warehouses, and mixed-use developments — from $100K tenant improvements to $20M ground-up projects — across Los Angeles, Orange, Riverside, and San Bernardino Counties, and the High Desert.
Since 1991
34+ years building Southern California
CA License #632388
Class B General Building · Bonded & Insured
$100K – $20M
Tenant improvements to ground-up developments
5 Counties Served
LA · Orange · Riverside · San Bernardino · High Desert
Three Decades Building Southern California.
Vlahos Construction Co. Inc. is a commercial general contractor serving Southern California since 1991. Led by President John Koulos, we build office, retail, industrial, and mixed-use projects for property owners, developers, and business tenants across Los Angeles, Orange, Riverside, and San Bernardino Counties. We're licensed in California (#632388, Class B General Building), fully bonded and insured — and most of our work still comes from clients we've built for before.
Full-Service Commercial Construction in Southern California.
From pre-construction through punch-list — the specialties we self-manage for commercial owners, developers, and tenants across Southern California.
Ground-Up Construction
New commercial buildings, foundation to finish.
Tenant Improvements
Interior buildouts for landlords preparing space and tenants moving in.
Commercial Renovation
Modernizing existing buildings without starting from scratch.
Shell & Core Buildout
Base-building construction ready for future tenant fit-outs.
Additions & Expansions
Adding square footage to existing commercial facilities.
Construction Management
Running the project on the owner's behalf, start to finish.
Pre-Construction & Estimating
Accurate budgets and schedules before ground-break.
ADA Compliance Upgrades
Bringing commercial properties up to current accessibility code.
Demolition & Site Prep
Clearing and readying sites for new construction.
Owner's Representation
Protecting the owner's interests across budget, schedule, and quality.
Commercial Construction for Owners, Developers, and Tenants.
Office & Corporate
Class A and Class B office space, corporate campuses, and professional suites.
Retail & Restaurant
Storefronts, shopping centers, and restaurant buildouts.
Industrial & Warehouse
Distribution centers, light manufacturing, and flex space.
Mixed-Use & Multifamily
Ground-floor commercial, podium construction, and residential-over-retail.
From $100K Tenant Improvements to $20M Ground-Up Builds.
Vlahos Construction takes on commercial projects across a 200x range — with the same crew discipline, subcontractor relationships, and owner-led decision-making on every job. That breadth is why repeat clients come back for both their $250K remodel and their next $15M build.
Serving All of Southern California.
Home base is Southern California. We build throughout Los Angeles County — including the Antelope Valley cities of Palmdale and Lancaster — plus Orange County, Riverside County, and San Bernardino County, including the High Desert communities of Victorville, Hesperia, and Apple Valley. Licensed statewide in California. For the right project, we'll travel.
Projects We're Proud Of.
A few of the commercial builds that define the Vlahos portfolio — from tenant improvements to full ground-up developments across Southern California.
Redondo Beach, CA
Full restaurant buildout in Redondo Beach. Retail & Restaurant · 2026.
Los Angeles, CA
Full restaurant buildout in Los Angeles. Retail & Restaurant · 2021.
Fullerton, CA
Full restaurant buildout in Fullerton. Retail & Restaurant · 2023.
What Clients Come Back For.
Three reasons repeat clients keep calling — every year, for every kind of commercial project.
34+ Years, Same Name. Since 1991, a stable, owner-led team — no revolving door of project managers.
Real Range. $100K to $20M under one roof. Tenant improvements to ground-up developments.
Commercially Focused. Office, retail, industrial, and mixed-use — our day-to-day, not occasional work.
Ready to Price Your Next Commercial Project?
Send us your plans, scope, or a rough idea. We'll reply with next steps and a realistic path forward — usually within one business day.
Let's Build.
Tell us about your project and we'll follow up within one business day.