Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Styles & brands we work with
See the difference
Before
After
Before
After
Before
AfterHow Much Does Home Addition Cost in Miami?
A home addition in Miami, FL typically costs between $53,100 and $153,400 in 2026. Most homeowners we work with across Miami-Dade County pay somewhere in the $80,000 to $110,000 range for a standard bedroom-and-bathroom bump-out. Where you land depends on square footage, foundation work, whether you’re adding a second story, and how much mechanical work (HVAC, electrical, plumbing) the new space requires.
At Penhallow Remodeling Miami, you’ll get a written price before any work starts. Not a range, not a verbal estimate. A line-item number you can hold us to, backed by the 365-Day Done Right Promise. If the work isn’t done right inside a year, we come back and make it right at no charge. That’s The Kingswell Way, the standard we’ve operated under since 2004.
Key Takeaways:
- Typical Miami home addition: $53,100 – $153,400
- Cost per square foot: $150 – $310 depending on finish level and site conditions
- Bump-out (single room, no plumbing): approximately $53,000 – $75,000
- Full master suite addition with bathroom: approximately $85,000 – $140,000
- Second-story addition: $120,000 – $153,400+
- Foundation requirements, hurricane code compliance, and design fees are included in our written quote, never added after demo
Home Addition Cost Breakdown (2026)
Here’s how a typical Miami home addition budget breaks down. These ranges reflect what we’re seeing on actual projects in neighborhoods like Coral Gables, Kendall, Westchester, and Pinecrest right now. The home addition in Miami market has shifted toward higher-end materials as homeowners think about resale value in a competitive housing market.
| Line Item | Typical Cost Range (Miami, 2026) |
|---|---|
| Design & architectural drawings | $3,500 – $9,500 |
| Permits & Miami-Dade code compliance | $2,000 – $7,000 |
| Foundation / slab work | $8,000 – $22,000 |
| Framing & structural | $15,000 – $38,000 |
| Roofing tie-in & waterproofing | $4,000 – $14,000 |
| Electrical (panel, wiring, fixtures) | $4,500 – $12,000 |
| HVAC extension / mini-split | $3,000 – $10,000 |
| Plumbing (if adding bathroom) | $4,000 – $14,000 |
| Drywall, insulation, painting | $6,000 – $16,000 |
| Flooring | $3,500 – $12,000 |
| Windows & doors (impact-rated) | $4,000 – $16,000 |
| Finishes, trim, hardware | $5,000 – $18,000 |
That’s the honest line-item view. Most contractors quote a single lump sum, which is fine until the project ends and nobody can explain what the money went to. At Penhallow Remodeling Miami, every project gets a written breakdown before the first tool is picked up. The number on day one is the number on the final invoice.
What Drives Cost Up or Down
The two biggest cost levers in Miami are foundation type and bathroom count. A slab-on-grade addition in Kendall with no plumbing runs toward the bottom of the range. A raised-foundation addition in Coral Gables with a full bathroom and impact windows runs toward the top. Materials make a real difference too: we install Cambria, Silestone, and Caesarstone countertops, Kohler and Moen fixtures, and Therma-Tru doors. Those products carry their own manufacturer warranties alongside our 365-Day Done Right Promise, which matters when an addition is a six-figure investment.
What Affects Home Addition Pricing in Miami
- Hurricane code compliance. Miami-Dade has the strictest wind-load requirements in the state. Impact-rated windows, reinforced roof tie-downs, and proper strapping add $4,000 – $16,000 compared to non-compliant construction. Every Miami addition must meet this code. We quote it up front so there are no surprises when the inspector walks through.
- Lot size and setback lines. In older east-side neighborhoods like Shenandoah and Silver Bluff, setbacks are tight. A smaller buildable footprint sometimes forces a second-story addition, which costs more per square foot because you’re paying for structural engineering, stair placement, and a more complex roof integration.
- Foundation conditions. South Florida soil shifts. Some homes in Westchester sit on muck pockets that require deeper footers or soil remediation before framing can start. A soil test during the estimate phase saves you from a $15,000 discovery halfway through demo.
- Plumbing and electrical upgrades. Older Miami homes (built before 1970) often have 100-amp panels that can’t support an addition’s electrical load. Upgrading to 200 amps runs $2,500 – $5,500. If the addition includes a bathroom, sewer line distance matters: every 10 feet of additional pipe over 30 feet adds roughly $800 – $1,200 in materials and trenching.
- Finish level. Builder-grade fixtures run toward the bottom of any range. Paint-grade trim, mid-tier tile, and laminate counters in a guest room addition are very different from a master suite with Cambria quartz in the bathroom, hardwood floors, and a walk-in shower. The difference can be $35,000 or more on the same footprint.
- Access to the work area. Corner lots and homes with rear alley access are faster and cheaper to build on. Mid-block homes where every board and wheelbarrow has to come through the front door add 10 – 15% in labor. In neighborhoods like Roads and Coconut Grove where homes sit close together, access planning matters more than most people expect.
How to Save on Home Addition
Here’s what we tell homeowners at the kitchen table during the free estimate. Some of these save real money. Some save money on paper only. We’ll tell you which is which before you spend a dime.
- Keep plumbing where it is. A new bedroom with no bathroom is the single most affordable addition type. Add a powder room later, or position the addition so a future bathroom can tie into existing supply and drain lines without cutting through the slab.
- Build with standard window sizes. Custom-sized impact windows are 40 – 60% more expensive than standard openings. Work with your designer to frame for off-the-shelf sizes from manufacturers we already source.
- Do the design right the first time. Changes after permit approval mean re-submission fees, re-drawn plans, and construction delays. A clean permit set costs $3,500 – $9,500 and saves double that when you avoid mid-build changes.
- Choose mid-tier finishes initially. You can upgrade faucets, cabinet hardware, and light fixtures any time. You can’t easily upgrade structural framing, waterproofing, or insulation later. Put money into the envelope first.
- Get a second opinion before a repair, not after. If a contractor tells you your roofline needs completely re-engineered to support a bump-out, get that verified. We’ve walked into estimates where a previous contractor quoted $30,000 for structural work that a truss specialist resolved for $6,000.
One thing we won’t do is tell you to skip permits. Unpermitted additions in Miami-Dade are caught during title searches and appraisals. They can delay a home sale by months and reduce resale value by more than you saved. We pull every permit, meet every inspection, and handle all Miami-Dade compliance paperwork as part of our written price.
Want a real number for your specific addition? Call (850) 988-7559. A live person answers 24/7, and the estimate is free, with no expectation that you’ll sign. You’ll leave the conversation knowing exactly what your addition costs and exactly how long it takes.
FAQs – Home Addition Cost
How much does a home addition cost per square foot in Miami?
Most Miami home additions run $150 – $310 per square foot in 2026. The lower end reflects simple bump-outs with no plumbing on slab foundations. The upper end reflects two-story additions, bathrooms, and hurricane-rated window packages. For a precise per-square-foot number on your specific project, call (850) 988-7559 and we’ll walk your property and give you a written price.
Is it cheaper to build up or out in Miami?
It depends on your lot. On standard Miami-Dade lots with room to expand on the ground, building out typically costs $150 – $230 per square foot. Going up adds $70 – $120 per square foot to that range because of structural reinforcement, stair construction, and roof reconfiguration. The tipping point is usually land value: in neighborhoods like Coral Gables and Coconut Grove where lot values exceed $600,000, building up often makes more financial sense despite the higher per-foot cost. We’ll run both numbers during your estimate.
How long does a home addition take in Miami?
A single-room bump-out typically takes 10 – 14 weeks from permit approval to final inspection. A master suite addition with bathroom runs 14 – 20 weeks. A full second-story addition can take 6 – 9 months. Miami-Dade’s permit review process adds 4 – 8 weeks on top of construction time. When we give you a written price, it includes a timeline. The arrival window we commit to is the window our crew hits.
Do I need a permit for a home addition in Miami-Dade County?
Yes. Any addition that changes the building footprint, roofline, or structural system requires a permit through Miami-Dade’s Building Department. Skip it and the county can fine you, your insurance can deny claims on the addition, and the unpermitted work becomes a title problem when you sell. Every Penhallow Remodeling Miami project includes permitting in the written price. We handle the paperwork, the drawings, and the inspections so you never stand in line at a county office.
Can you match my existing Miami home’s roofline and exterior?
Yes. We tie new rooflines into existing hip and gable roofs every month in Miami. Matching exterior finishes (stucco texture, barrel tile, window styles) adds $4,000 – $14,000 depending on how unusual your existing finish is. We source materials from James Hardie and other recognized manufacturers, and the written guarantee covers the blending work the same way it covers the structure itself. If the seam between old and new settles or shifts inside a year, we return and fix it at no charge under the 365-Day Done Right Promise.
Is financing available for home additions?
If your project totals $53,000 or more, common financing routes include HELOCs, cash-out refinances, and renovation loans like the FHA 203(k). Most Miami homeowners we work with finance additions through home equity, since rates on these products are typically lower than unsecured options. We’re not lenders, but we’ll help you understand which loan types work with our written pricing model. The written quote we provide meets lender documentation requirements for most renovation loan programs. Call (850) 988-7559 and we’ll walk you through what your bank or mortgage broker needs from us.
Why Homeowners Choose Penhallow Remodeling Miami for Additions
If you’ve done construction before, you’ve probably been burned by a number that changed mid-project. That doesn’t happen at Penhallow. Trevor Nash and our team operate under a simple standard called The Kingswell Way, in place since 2004: say the price before the work, show up in the window we gave, leave the place cleaner than we found it. Every addition gets a written price and a written guarantee before the first permit is pulled.
Every technician on your job is background-checked and arrives in uniform. You know exactly who is walking into your home. If something fails inside 365 days, we come back and make it right at no charge. If a repair fails, the second visit is free. No service call, no re-inspection fee, no fine print.
And when you call, a live person answers. Not an answering service. Not a voicemail prompt. A real person, 24 hours a day, 7 days a week. That’s a standing fact at our company, not a marketing line.
Pricing reflects the Miami market as of 2026. Penhallow Remodeling Miami offers free estimates – call (850) 988-7559.
Written by Trevor Nash, Owner at Penhallow Remodeling Miami, serving homeowners throughout Miami-Dade County.
What Our Customers Say
"Full home refresh before we sold. They were straight about what was worth doing and what wasn't to get our money back. On time, on budget, and it sold in a week."
- Monica Vaughn"Full kitchen down to the studs. The written estimate held and they finished on the day they promised. Crew was tidy and polite the whole month. Rare to find."
- Vernon Askew"Did our whole kitchen. The written estimate held, which after reading remodel nightmares online I did not take for granted. Showed up every morning on time and the crew was clean and polite."
- Warren Updike
