Home Additions
Home Additions in La Mirada, CA
La Mirada Builders designs and builds custom room additions for homeowners throughout La Mirada and the surrounding communities. Whether you need a single room addition, a second-story addition, or a smaller bump-out for extra space, we handle the design, permitting, and structural work under one dedicated team.
Every addition is designed to match your home's existing architecture, followed by a clear, honest estimate before any work begins. For a look at our full range of remodeling services, visit our homepage.

What's Included
Full-Service Home Additions
From a single room addition to a second story, we handle every part of your project.
Investment
Home Addition Pricing
This range covers most La Mirada home additions, but every project is different. Final cost depends on the size of the addition, whether it's single or second-story, and the finishes you choose. We provide a free, itemized estimate before any work begins.
Why Choose Us
Why Choose La Mirada Builders for Your Home Addition
Insured
Fully insured for your protection and peace of mind on every project.
Since 2011
Over a decade of remodeling homes throughout La Mirada and the surrounding communities.
Free Estimates
Transparent, no-pressure quotes so you know exactly what to expect before we start.
Quality Craftsmanship
Meticulous attention to detail and premium materials on every job, big or small.
On-Time & On-Budget
Clear timelines and honest pricing — we respect your home, your schedule, and your budget.
One Trusted Team
From design to final walkthrough, you work directly with Alex and a dedicated crew.
FAQ
Home Addition Questions
How long does a home addition take in La Mirada?
Most room additions take about 3 to 6 months from permitting through final walkthrough, depending on the size and complexity of the project. Second-story additions and additions with significant structural changes typically take longer than a single-story bump-out.
Do I need a permit for a home addition?
Yes, home additions almost always require permits since they involve structural work, and often electrical, plumbing, and HVAC changes as well. We handle the design, engineering, and permitting process as part of the project.
Will the addition match my home's existing style?
Matching your home's existing roofline, siding, windows, and finishes is a core part of how we design additions, so the final result looks like it was always part of the house rather than an obvious add-on.
Can I stay in my home during construction?
In most cases, yes — since additions typically involve new square footage rather than gutting existing living space. We'll walk you through what to expect for your specific project, including any temporary access or noise considerations.
Do you handle both design and construction?
Yes. We work with you from initial planning and permitting through construction and the final walkthrough, so you have one dedicated team managing your project from start to finish.
Service Area
Home Additions Throughout the Area
Based in La Mirada, we build home additions throughout the surrounding communities.
- La Mirada
- Whittier
- La Habra
- Fullerton
- Buena Park
- Brea
- Norwalk
- Santa Fe Springs
- Cerritos
- Artesia
- La Palma
- Cypress
- Placentia
- Yorba Linda
- Hacienda Heights
- Rowland Heights
- Downey
- Pico Rivera
and surrounding areas within 30 miles of La Mirada
Ready to Start Your Home Addition?
Tell us about your project and we'll get back to you with a free, no-pressure estimate.