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Top Licensed Home Addition Contractor in Simi Valley, CA

Room Additions by a top-rated, local licensed general contractor serving Simi Valley and Ventura County. Free estimates, written fixed-price contracts, 24/7 support.

Room Additions in Simi Valley

Looking for a trusted home addition contractor in Simi Valley? When your family outgrows the house but you love living in Simi Valley, an addition is usually smarter than moving. We design and build ground-floor additions, primary suites and second stories that look like they were always part of the home.

Simi Valley is about 24 miles west of our North Hollywood office, so our Southern California crews are on site quickly for estimates, inspections and the day-to-day work.

What's included

Design and structural engineering
Foundation and framing tied into the existing house
Roof extension matched to existing materials
Plumbing, electrical and HVAC extensions
Windows, doors, insulation and drywall
Interior finishes matched to the rest of the home

Building in Simi Valley

Hot summers and seasonal Santa Ana winds in Simi Valley affect roofing, exterior finishes and landscaping choices. We use wind-rated installation methods and heat-tolerant materials suited to inland Southern California.

Building permits for Simi Valley projects are issued by the City of Simi Valley. Additions need full plan check in Simi Valley, including structural engineering and energy compliance. We prepare the drawings and manage plan-check corrections for you.

What affects the price

Ground-floor addition versus second story
Square footage and number of new bathrooms
Foundation type and soil conditions
Matching existing roofing, siding and windows
Whether HVAC capacity needs to increase

Every estimate is free, written and itemized. Call 844-975-5512 to schedule a visit.

How we work

Free consultation: We visit your Simi Valley property, listen to your goals and look at the site.
Design and written estimate: You get a clear scope and an itemized price before anything starts.
Permits and scheduling: We handle plans, permits and the construction schedule.
Build and final walkthrough: Our crew builds, passes inspections and walks you through the finished work.

What our customers say

“When our bathroom flooded and we had to leave our home, our family was desperate. We called AAA and within the hour we had a full emergency service team at our doorstep.” — Jaqueline, Woodland Hills, CA

Simi Valley Room Additions FAQ

Can I live in my home during an addition?

In most cases yes. We seal off the work area and schedule disruptive tie-in work so you lose access to as little of the house as possible.

Is a second story or a ground-floor addition better?

A ground-floor addition is usually simpler. A second story keeps your yard but needs more structural work. We walk your Simi Valley lot and give you both options with prices.

Do you do the design work?

Yes. We are a design-build contractor, so drawings, engineering, permits and construction are handled by one team.

Do you serve all of Simi Valley?

Yes. We work throughout Simi Valley and the surrounding Ventura County communities from our North Hollywood office. Call 844-975-5512 to schedule a free estimate.

More services in Simi Valley

Home Addition Contractor near Simi Valley

AAA All Star Construction Inc. · Licensed California General Contractor CSLB #1018926 · Call 844-975-5512

At AAA All Star Construction Inc, we bring your vision to life with unmatched craftsmanship and dedication. Trust us to transform your space into something extraordinary, where quality meets innovation.