Space to Grow,Built to Belong
Expand your home without moving — seamless additions that look like they were always part of your home, designed around how your family actually lives.
3–6 Months
Average Timeline
Thorough process, quality results
$80K – $200K+
Typical Investment
Transparent pricing, no surprises
75–85% ROI
Value Added
One of the highest-ROI home upgrades
More Than an Addition — a Better Way to Live
Running out of space in your home? A room addition is often more cost-effective than moving, allowing you to stay in your neighborhood while gaining the extra square footage you need. Our expert team specializes in creating additions that look like they were always part of your home.
From master suites to family rooms, we handle every aspect of your addition project — from initial design through final construction. With careful planning and attention to detail, we ensure your new space integrates seamlessly with your existing home's architecture and style.
Featured Addition Projects
Seamlessly integrated additions that enhance home value and expand your living space.
Anna's Full Remodel
Complete home remodel featuring a stunning dark navy kitchen with quartz waterfall countertops, hammered gold pendant lights, exposed wood beam ceiling, professional-grade range, gold fixtures throughout, herringbone tile laundry room, and custom cabinetry.
Glen's Full Remodel
Complete home transformation featuring beautifully designed bedrooms with sliding glass patio doors, modern bathrooms with chevron herringbone tile, oak vanity with marble countertops, black matte fixtures, LED backlit mirrors, fluted wood accent shower walls with illuminated niches, and a spacious open hallway layout.
Michael & Cecilia's Remodel
Stunning whole-home remodel featuring luxurious bathrooms with gold fixtures throughout, oak vanities with quartz countertops, freestanding soaking tub with wall-mounted gold faucet, spa-inspired walk-in shower with fluted wood accent tile, illuminated niches, built-in bench, and marble floor tile.
Rebecca's Home Remodel
Complete home remodel featuring a beautiful blue cabinetry kitchen with oak upper cabinets, quartz countertops, stainless steel farmhouse sink, professional-grade range with hood vent, double wall ovens, hardwood flooring throughout, and open-concept living with brick fireplace.
Ryan's Home Remodel
Stunning whole-home remodel featuring a bright white shaker kitchen with vaulted ceilings, quartz waterfall island with wood slat accent panel, floating wood shelves with under-shelf lighting, gold hardware and faucet, marble-look tile backsplash, black-framed windows, and light oak flooring throughout.
Vaulted Ceiling Family Room Addition
Added stunning vaulted ceiling family room with expansive windows, modern chandelier, and black-framed windows. Perfect for entertaining with abundant natural light and architectural interest.
Complete Home Remodel & Addition
Comprehensive remodel including room addition, new roof, modern gray and white exterior paint, black-framed windows, solar panel installation, and professional landscaping for contemporary curb appeal.
What's Included in Your Room Addition
A comprehensive design-build experience covering every detail
Design & Engineering
Construction
Infrastructure
Our Room Addition Process
A structured, transparent process from first conversation to final walkthrough
Consultation
We visit your home, assess the space, discuss your goals, and explore what type of addition makes sense.
Design & Engineering
Architectural plans, structural engineering, 3D renderings, and material selection tailored to your home.
Permits & Planning
We handle all permit applications, contractor scheduling, and material procurement.
Construction
Foundation, framing, roofing, and interior finishing with daily progress updates.
Final Walkthrough
Thorough quality inspection and complete walkthrough to ensure seamless integration.
Hear It From Our Clients
Real homeowners sharing their room addition experience with Atlantis
Glen's Testimonial
Tiffany and Ryan's Testimonial
Cecilia & Michael Lewis Testimonial
Shini & Reji's Testimonial
Cecilia & Michael Tour
Arun's Testimonial
Rebecca's Testimonial
Anna's Full Remodel
Denise's Testimonial
Homeowner Testimonials
Real stories from families who expanded their homes
Frequently Asked Questions
Everything you need to know about room additions with Atlantis
Ready to ExpandYour Home?
Schedule a free, no-obligation consultation. We'll visit your home, discuss your vision, and provide a detailed project plan.
Licensed & Insured · CA License #1097852 · Serving the Bay Area