Arizona Home Additions, more room, built to belong.
From a new bedroom to a primary suite or second story, one Bayside team handles design, engineering, permits, and construction, so your addition looks like it was always part of your home.
- $150 – $300Per square foot
- 8–20 WeeksTypical construction
- Fixed PriceItemized before demo
- Licensed & InsuredROC #353387
What an Arizona addition really takes.
Choose the type of space you have in mind to see a typical budget, what's included, and how long it takes from the first sketch to move-in day.
- 150–300 sq ft bedroom, office, or family room
- Foundation, framing & roof tie-in
- Stucco and roofline matched to your home
- Dual-pane, low-E windows
- HVAC extended to the new room
About 6 months, end to end
Engineering and city plan review set the pace on additions, so we prepare permit-ready drawings early to keep review moving.
- 400–600 sq ft bedroom suite
- Spa bathroom with walk-in shower
- Walk-in closet with custom storage
- New roof section, stucco & windows
- Dedicated HVAC zone or mini-split
About 8 months, end to end
Most of the work happens outside your existing walls, so you stay home until we open the connection at the end.
- 600–1,200 sq ft upper floor
- New bedrooms & bathroom
- Structural reinforcement below
- New staircase & roof
- Dedicated HVAC zone
About 10 months, end to end
Most Arizona homes are single-story on slab, so we confirm your foundation and walls can carry a second floor before design begins.
Every dollar, accounted for.
A typical split for a Primary Suite. Your Bayside estimate is itemized the same way, so you can see what each choice costs before we start.
Built for Arizona summers.
Summer heat and intense sun shape how an addition should be built. These are the choices we recommend most.
Texture and color blended to your existing walls so the addition reads as original.
The Arizona standard: long-lasting, fire-resistant, and easy to match to existing roofs.
Reflects heat and suits modern rooflines and detached ADUs.
Blocks most solar heat while letting light in. A strong value choice.
Stays stable in extreme heat and won’t warp, fade, or chalk over time.
Opens a suite or guest house fully to the backyard.
Works when your current system has spare capacity, confirmed with a load calculation.
Independent, efficient cooling, ideal for ADUs and rooms far from the main unit.
Seals the roof and walls against summer heat and keeps cooling costs down.
Your number, fixed before we start.These are typical Arizona planning ranges, not a quote. Your free in-home consultation gives you a fixed, itemized estimate based on your lot, your plans, and your permit needs.
Plan My Addition →From first sketch to move-in day.
- 01Week 1
Consultation & site review
We walk your property, check setbacks and utilities, and talk through how you’ll use the new space.
- 02Weeks 2–10
Design & engineering
Floor plans, elevations, and structural engineering, then a fixed, itemized estimate.
- 036–14 weeks
Permits & HOA
We submit plans to your city and HOA and handle every comment until they’re approved.
- 048–24 weeks on site
Construction
Foundation to finishes with one project lead, scheduled inspections, and regular updates.
- 05Handover
Final inspection
We pass final inspection, walk every detail with you, and hand over the keys.
Trusted with the biggest projects in their homes.
They handled everything from getting the permits to passing inspections, and all the coordination in between. The communication was always clear and consistent, which gave us a great sense of comfort.
They were easy to work with and very communicative, and helped us with the permits, inspections, and finding the right materials. Our project was smooth and importantly on budget!
He gutted my bathroom, moved plumbing, repositioned the vanity and toilet, and added recess lights. Sam and his crew were meticulously clean, thorough, punctual, and attentive to our needs.
I 100% recommend Bayside for any type of home remodeling. They used the best material and took care of every detail. We’ll be contacting them again when we’re ready!
Home addition questions.
Straight answers on cost, timelines, permits, and what your lot allows for an Arizona home addition.
Most Arizona home additions run about $150 to $300 per square foot. A 150 to 300 sq ft room addition typically costs $45,000 to $90,000, a primary suite $90,000 to $180,000, and a second story $150,000 to $300,000 or more. Plumbing, roof tie-ins, and finish level are the biggest cost drivers. Bayside gives you a fixed, itemized estimate before construction begins.
Construction typically takes 8 to 12 weeks for a room addition, 12 to 16 weeks for a primary suite, and 16 to 24 weeks for a second story. Including design, engineering, and permits, plan on roughly 5 to 12 months from your first meeting to move-in day.
Often, yes. Most Arizona homes are single-story on a slab, so a structural engineer first confirms whether the foundation and walls can carry the extra load or need reinforcement. City height limits and HOA rules also apply, and we check both during the site review.
Yes. Every addition requires a building permit, and most also need structural engineering. If you’re in an HOA, exterior plans usually need approval too. Bayside prepares the drawings and manages city and HOA review for you.
That’s the goal from day one. We match rooflines, roof tile, stucco texture, paint, and window style so the new space looks like it was always part of the house.
Sometimes. We run a load calculation on your existing system. If it has spare capacity, we extend the ductwork; if not, a ductless mini-split or a dedicated unit keeps the new space cool through Arizona summers.
For ground-floor additions, yes. Most of the work happens outside your existing walls, and we open the connection near the end. For a second story, most homeowners move out while the roof is open.
Yes. Bayside Home Builders is licensed in Arizona (ROC #353387), bonded, and insured. You can verify our license directly on the AZ ROC website.
Yes. Bayside offers $0-down home improvement financing. Many homeowners also use a HELOC or construction loan for larger projects, and our itemized proposals give lenders what they need.
More of what we design & build.
Adding space is often part of a bigger plan. One team can take on the whole picture.
