Addition Types We Specialize In
Bedroom Additions
Add a master suite or extra bedroom to your home. We frame, drywall, and finish the space to match your existing interior.
Family Room Extensions
Expand your living space with a family room addition. We handle everything from the foundation tie-in to the finished ceiling.
Second-Story Additions
Double your living area by going up. We assess your existing structure, add proper support, and frame the second floor correctly.
Kitchen Bump-Outs
A smaller addition that pushes out one or two walls to give your kitchen more floor space without a full addition.
Sunroom & Patio Enclosures
Convert an open patio or add a new sunroom with proper framing, insulation and window installations.
Multi-Room Additions
Larger additions that add two or more rooms at once — master suite plus office, or great room plus mudroom.
Room Addition Cost Estimator
Get a rough idea of what your addition might cost before you call.
Room Addition Cost Estimator
Estimates for Central Valley, CA
* Estimates for Central Valley, CA. Includes framing, drywall and interior finish. Excludes site-specific conditions, permits, and MEP trades.
Our Addition Process
From your first call to the final walk-through — a clear process so you know exactly what to expect.
Free Estimate & Site Visit
We visit your property, review your plans or vision, and provide a detailed written estimate at no charge.
Plan Review & Engineering
We review architectural plans and coordinate with a structural engineer when required for load-bearing changes.
Permit Coordination
We assist with permit submission to your city's building department. Room additions in California always require permits.
Foundation & Framing
We pour footings or tie into the existing foundation, then frame walls, floor and roof to match your home seamlessly.
Rough-In & Inspections
We coordinate with electricians and plumbers, then schedule and pass rough framing inspection before close-in.
Drywall, Trim & Finish
Drywall hang, texture, trim, paint and final inspection — your addition is ready to furnish and enjoy.
Get Your Free Addition Estimate
Tell us about your project and we'll respond the same day.
Room Addition FAQ
How much does a room addition cost in the Central Valley?
Most room additions in Ceres, Modesto and Turlock range from $100–$250 per square foot depending on complexity. Use the estimator above for a rough ballpark, or call us for a free on-site quote.
Do you pull permits for room additions?
Yes — always. Room additions require building permits in every California city. We help coordinate with your local building department and our work is inspection-ready.
How long does a room addition take to build?
A typical single-room addition takes 4–10 weeks from permit approval to completion. Second stories or larger additions can take 3–5 months.
Can you match the existing exterior of my home?
Yes. We take care to match your existing roofline, siding, and exterior trim so the addition looks like part of the original house.
Do you handle the foundation work for the addition?
Yes. We coordinate foundation and footing work, either doing it directly or working with a concrete sub we trust.
What areas do you serve for room additions?
We build additions in Ceres, Modesto, Turlock, Salida, Riverbank, Patterson and surrounding Stanislaus County.
Why a Licensed Contractor Matters for Additions
Unpermitted additions must be disclosed — and can be ordered demolished — when you sell. Hire licensed from day one.
| Factor | C Hernandez Construction Lic. #1106454 | Unlicensed Contractor |
|---|---|---|
| CA State License Verified | ||
| Liability Insurance | ||
| Workers' Compensation | ||
| Pulls Required Permits | ||
| Passes City Inspections | ||
| Protects Your Home Value | ||
| Legal for Sale/Refinance | ||
| Accountable if Issues Arise |
In California, hiring an unlicensed contractor for projects over $500 is illegal and can void your homeowner's insurance.
Room Additions in the Central Valley
We serve the entire Stanislaus County area and surrounding communities. Same licensed crew, same quality — wherever you are.
Our home base. We know the local permit office and inspection requirements inside and out.
Serving all Modesto neighborhoods — from East Side to West Side and surrounding areas.
ADUs, framing, and home additions throughout Turlock and nearby communities.
Fast service to Salida with the same licensed, inspected quality as everywhere we build.
Experienced with Riverbank building codes and permit processes for residential projects.
Serving Patterson with framing, ADU construction, and general contracting services.
Recent Projects
Real projects from our crew — framing, ADUs, additions and more across the Central Valley.
Ready to Add Space?
Mon–Sat 7am–6pm · Free estimates · Licensed & insured