★ ADUs, Garage Conversions & Room Additions from $499/Month · $0 Down · 0% Interest Financing Available
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ADUs & Additions from $499/Month
$0 Down · 0% Interest Financing Available

Home Additions & ADU Builders in Tampa Bay.

Architects, engineers, permits, builders. All under one roof. Room additions, in-law suites, garage conversions, and second-story additions, fully turn-key.

  • Dedicated designer + 3D renderings of your new space, included
  • Fixed pricing · 100% satisfaction guarantee · 5-year workmanship warranty
  • Voted Best Design-Build Contractor in Tampa Bay · 100+ five-star reviews
★★★★★  5.0 from 100+ Google Reviews
· Licensed CBC1269114 · 10 Years in Tampa Bay
10+
Years in Business
50+
ADUs & Additions Built
5.0★
100+ Google Reviews
100%
Satisfaction Guarantee
3D
Renderings Included
FL Lic.
CBC1269114
Voted Best in Tampa Bay

Voted Best Design-Build Contractor in Tampa Bay

★★★★★  5.0 average from 100+ verified Google reviews · Backed by our 100% Satisfaction Guarantee

CraftLine Remodeling, Tampa Bay design-build team
Why Choose CraftLine

Built around you, not us.

Adding space to your home should be exciting, not stressful. That's why every CraftLine ADU project starts with a dedicated designer who listens first, then designs around your goals, whether that's rental income, an in-law suite, or simply more square footage for your family. We confirm zoning, run the permits, and build it turn-key.

You get a fixed price before construction starts. You get a project manager who answers the phone. You get a designer who stays involved through the build. And when we hand you the keys, you get our 100% satisfaction guarantee plus a 5-year written workmanship warranty that what we built is built to last.

  • 3D Renderings Included
  • Fixed Pricing in Writing
  • 100% Satisfaction Guaranteed
Inspiration Layouts

ADU & garage conversion floor plans.

A few of the most popular layouts we build in Tampa Bay. Every CraftLine project is custom-designed by our in-house architect, so yours will be uniquely tailored to your lot, your goals, and Tampa Bay zoning.

Garage Conversion LIVING KITCHEN BED BATH
Option A · 1 Story

Garage Conversion Studio

  • $35,000 – $48,000
  • 250 – 400 sq ft
  • Studio or 1 Bedroom
  • 1 Bathroom
  • Open kitchen + living
Starting At $35,000
ADU · 1 Story BEDROOM LIVING KITCHEN BATH
Option B · 1 Story

1-Bedroom Detached ADU

  • $120,000 – $160,000
  • 400 – 575 sq ft
  • 1 Bedroom
  • 1 Bathroom
  • Full kitchen + private entry
Starting At $120,000
ADU · 1 Story BED 1 BED 2 LIVING/KITCHEN BATH LAUNDRY
Option C · 1 Story

2-Bedroom Detached ADU

  • $160,000 – $210,000
  • 650 – 800 sq ft
  • 2 Bedrooms
  • 1 Bathroom
  • Full kitchen + laundry
Starting At $160,000
ADU · 2 Story 1st FLOOR 2nd FLOOR GARAGE ENTRY BEDROOM LIVING BATH
Option D · 2 Story

ADU with Garage Below

  • $220,000 – $280,000
  • 400 – 575 sq ft living + garage
  • 1 Bedroom
  • 1 Bathroom
  • Ground-floor garage included
Starting At $220,000
ADU · 2 Story 1st FLOOR 2nd FLOOR KIT BATH LIVING BED 1 BED 2 BATH
Option E · 2 Story

2-Bedroom 2-Story ADU

  • $240,000 – $320,000
  • 650 – 850 sq ft
  • 2 Bedrooms
  • 1.5 – 2 Bathrooms
  • Open-concept main floor
Starting At $240,000
Room Addition EXISTING HOME MASTER BED BATH CLOSET
Option F · 1 Story

Master Suite Addition

  • $80,000 – $140,000
  • 300 – 500 sq ft
  • Master bedroom + ensuite
  • Walk-in closet
  • Connects to existing home
Starting At $80,000

These layouts are for inspiration only. Every CraftLine project is fully custom-designed by our in-house architect, tailored to your property, your goals, and Tampa Bay zoning requirements.

How It Works

Five clear steps from first call to your new space.

Most projects start in 2 to 3 weeks. You'll always know what's happening now and what's next.

Step 1: Book Your Call

Start by scheduling a quick call with our team. We'll discuss your goals (rental income, in-law suite, more space), confirm general zoning eligibility, and book a free in-home site assessment.

Step 2: Free On-Site Assessment

Your dedicated designer visits your property, measures the build area, reviews zoning and utility access, and answers every question. You'll leave the meeting with a clear design direction and pricing range. No pressure, no obligation.

Step 3: 3D Renderings & Fixed Price

You see your new ADU, addition, or converted garage in full 3D before we build a thing. Floor plan, exterior, finishes, and layout, rendered so you can walk through it on screen. Then you get a detailed written proposal with a fixed price. You approve everything before construction is scheduled.

Step 4: Permits, Construction & Install

Our licensed team handles permits, schedules every trade, manages inspections, and runs the job from demo through final install. Your project manager gives you weekly updates, keeps the site clean, and is one phone call away the entire build.

Step 5: Final Walkthrough & Reveal

We walk through every detail of your finished build with you, resolve the punch list, and hand over your 100% satisfaction guarantee plus 5-year written workmanship warranty. Your new space is ready to use, rent, or move family into.

100%
Promise
Backed by our 100% Satisfaction Guarantee. Every step is on us. No surprise change orders, no hidden costs, no walking away until you love it. That's why we're voted Tampa Bay's best design-build contractor.
Tampa Bay Home Addition Services

Room additions, in-law suites, garage conversions & ADUs.

Every project includes design, 3D renderings, permits, fixed pricing, and our 100% satisfaction guarantee.

Most Affordable

Garage Conversion

Turn your existing garage into a livable studio or 1-bedroom suite. The fastest, lowest-cost way to add legal square footage.

Starting At
from$35,000
or from $499/month
  • Full insulation, drywall & flooring
  • New windows & entry door
  • Bathroom & kitchenette options
  • HVAC, plumbing & electrical
  • All permits & inspections
  • 4 to 8 week timeline
Get My Free Quote
Most Popular
Most Flexible

Room Addition & Master Suite Addition

Add a bedroom, family room, home office, master suite, or second-story addition to your existing home. Built to match your house, inside and out.

Starting At
from$40,000
or from $599/month
  • Foundation, framing & roof
  • Matched exterior siding & trim
  • Interior finishes to match home
  • Electrical, HVAC & plumbing
  • Engineering & structural drawings
  • All permits & inspections
  • 3D renderings included
  • 8 to 16 week timeline
Get My Free Quote
Rental Income

Backyard ADU & In-Law Suite

A standalone accessory dwelling unit (ADU) on your property. Rent it for monthly income or use it as an in-law suite. Real estate value boost.

Starting At
from$120,000
or flexible monthly financing
  • Standalone 1 or 2 bedroom unit
  • Full kitchen & bathroom
  • Separate utility connections
  • Private entry & address
  • Designed to maximize rental potential
  • Zoning & permit handling
  • 3D renderings included
  • 4 to 8 month timeline
Get My Free Quote

All pricing is a starting point. Your fixed price is finalized after your free in-home site assessment.

One Team. One Contract. One Price.

One stop shop, A to Z.

Most contractors leave you to chase the architect, the engineer, the permits, and five different trades on your own. We do all of it. One contract, one fixed price, one number to call. You pick the finishes. We handle the rest.

  • Design & architecture in-house
  • Engineering & permits handled
  • Every trade under our license
  • Fixed price, in writing, before we start
Accredited & Trusted In Tampa Bay
BBB A+
BBB Accredited
A+ Rated Business
Google Reviews
★★★★★ 5.0 Star Rated
Houzz Pro
Top Rated Remodeler
 NARI
NARI Member
Certified Remodeler
 TBBA MEMBER
TBBA Member
Trusted Local Builder
Where We Build

We build across Tampa Bay.

From South Tampa bungalows to new Wesley Chapel construction, we've added space to homes in every neighborhood.

South Tampa

Hyde Park, Bayshore, Davis Islands. Historic-home additions with matched architecture.

Carrollwood & Westchase

Larger-lot ADUs, master suite additions, and backyard rentals in the suburbs.

Clearwater & Belleair

Waterfront-home additions and in-law suite conversions on the coast.

St. Petersburg

Downtown St. Pete, Old Northeast, Snell Isle. Rental ADUs and family additions.

Wesley Chapel & Lutz

Larger-lot ADUs, full home additions, and in-law suites with room to build.

Brandon, Riverview & Valrico

Newer construction with strong rental demand. Fixed-price ADUs and additions.

Your free 1-hour design consult includes:

Why CraftLine

Everything you get with us.

Six things every ADU and addition project includes.

3D Renderings Included

See your new space on screen before we build it.

100% Satisfaction Guarantee

We don't stop until you love it. Plus a 5-year warranty.

Fixed Pricing & Financing

Fixed price in writing. Flexible monthly financing available.

Dedicated Designer

Custom layout designed around how you actually live.

One Team, Start to Finish

Same designer and project manager from day one to keys.

Licensed, Insured & Local

Florida-licensed CBC1269114. Fully insured. BBB accredited.

Common Questions

Tampa ADU & Addition: Frequently Asked Questions

Home additions in Tampa Bay run $200 to $300 per square foot fully finished. A 400 sq ft addition typically costs $80,000 to $120,000. Garage conversions start around $35,000. Larger room additions and master suites run $80,000 to $180,000. Full backyard ADU builds typically run $160,000 to $250,000+. After your free site assessment, we give you a fixed price you can count on. Financing from $499/month is available.
Garage conversions usually take 4 to 8 weeks. Room additions take 8 to 16 weeks depending on scope. Full ADU builds take 4 to 8 months including permits and inspections. We give you a clear timeline upfront and communicate every milestone.
Yes. All ADUs, garage conversions, and room additions require building permits. As a Florida Certified Building Contractor we handle every permit, engineering submission, and inspection. We also confirm zoning eligibility before any contract is signed so there are no surprises.
Yes. We're a Florida Certified Building Contractor (License #CBC1269114), fully insured, and BBB accredited. We're happy to provide our certificate of insurance and license verification before you sign anything.
In most Tampa Bay municipalities, yes. Rules vary by city and zoning. We help confirm rental eligibility before construction starts so you know whether your new unit can generate rental income or is for family use only.
All of Tampa Bay: South Tampa, Hyde Park, Carrollwood, Westchase, Brandon, Wesley Chapel, Clearwater, St. Petersburg, Tarpon Springs, and surrounding Hillsborough, Pinellas, and Pasco County neighborhoods.
100%
Satisfaction

Designed With You. Built By Us. 100% Guaranteed.

Every CraftLine project is backed by our 100% Satisfaction Guarantee, a fixed price that doesn't change, and a written 5-year workmanship warranty. You see your new space in 3D before we build a thing, and if something isn't right after the build, we come back and make it right. No fine print, no fights. That's why we're voted Tampa Bay's best design-build contractor.

Ready to Add Space, Income, or Value to Your Tampa Home?

Voted Best Design-Build Contractor in Tampa Bay. Free site assessment with 3D renderings, fixed pricing, financing from $499/month, and a 100% satisfaction guarantee on every project.

Book My Free Design Consult (813) 522-4359
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