Commercial · Multifamily · Prevailing Wage & Public Works
Built on Integrity.
Built to Last.Commercial & Multifamily Contractor
Nine County Builders delivers commercial construction, multifamily renovations, capital improvements and public works throughout the Bay Area and Northern California.
Proudly Serving Our Nine Counties
CSLB #1159005
Licensed California General Contractor
B — General Building Contractor
License Class
Commercial + Multifamily
Prevailing Wage + Public Works
What We Build
Construction Services
Eight service lines covering private and public work — from a single repair scope to a prevailing wage facility improvement or multi-phase capital program.
Commercial Construction
Ground-up, shell and core, and structural work for office, retail, light industrial and mixed-use buildings.
View serviceMultifamily Renovations
Common area, amenity, corridor and building-wide renovation work in occupied apartment communities.
View servicePrevailing Wage & Public Works
Public facility improvements and agency-funded scopes delivered with prevailing wage awareness, disciplined documentation and controlled site execution.
View serviceCapital Improvements
Planned, budgeted upgrades that extend asset life and reduce operating cost across a property or portfolio.
View serviceTenant Improvements
Buildouts that turn leased space into working space, coordinated around landlord requirements and lease dates.
View serviceUnit Renovations & Turns
Repeatable in-unit renovation and turn programs measured in days off market, not just cost per unit.
View serviceExterior Improvements
Envelope, siding, paint, deck, railing and site work that protects the asset and how it shows.
View serviceRepairs & Property Improvements
Smaller scoped repairs and improvement work handled with the same documentation as a capital project.
View serviceWhy Owners & Managers Choose Us
Construction Experience. Property Operations Mindset.
Construction inside an operating property affects residents, tenants, site teams, schedules and budgets. Knowing how to build is the baseline; running the work without disrupting the asset is the job.
Clear communication
One point of contact, written updates, and no surprises for the site team.
Schedule accountability
Dates you can hand to ownership, and early notice when conditions change.
Site coordination
Access, parking, staging, utilities and notices planned before mobilization.
Documentation
Photos, daily records, submittals and closeout packages kept current.
Safety
Site-specific plans covering crews, residents, tenants and the public.
Minimizing disruption
Phased work, defined noise windows, and clean areas returned each day.
Budget awareness
Written pricing, tracked allowances, and change orders approved before work.
Reliable closeout
Punch completed, warranties delivered, and the property left ready to operate.
Markets
Three Environments, Different Requirements
Commercial, multifamily and public work each bring different stakeholders, documentation requirements, site controls and operating constraints.
Multifamily
Apartment communities, mid-rise and garden-style properties where residents live through the work. Phasing, notices, noise windows and access control matter as much as the scope itself.
Commercial
Office, retail, light industrial and mixed-use buildings where tenant operations and lease obligations set the schedule. Work is sequenced around business hours and building rules.
Prevailing Wage & Public Works
Public facilities and agency-funded improvements where prevailing wage requirements, documentation, site controls and accountable coordination are central to project delivery.
Photography on this site is representative of the categories of work we perform. It does not depict specific completed projects by Nine County Builders.
Our Process
How a Project Runs
The same four stages whether it's one repair scope or a phased capital program across a portfolio.
- 01
Understand
Site walk with your team, existing conditions review, and a scope written in the language your approval process uses.
- 02
Plan
Budget, schedule, phasing and logistics — including access, parking, notices and how the property keeps operating.
- 03
Build
Supervised field execution, clean and secure job sites, and documented change management before anything moves.
- 04
Deliver
Punch walk with the site team, warranty and closeout documentation, and a final invoice that matches the approved scope.
Where We Work
Proudly Serving Our Nine Counties
Nine counties across the Bay Area, Northern California and the Central Valley — close enough to walk a property, price the scope and supervise the field.
- San MateoCounty
- Santa ClaraCounty
- San FranciscoCounty
- AlamedaCounty
- Contra CostaCounty
- SolanoCounty
- SacramentoCounty
- San JoaquinCounty
- StanislausCounty
Ready to price the scope?
Send drawings, an inspection report or a description of the problem. We'll confirm a site walk and come back with a written scope, budget and schedule.