Home Additions & ADU Cost Guide
What Does a Home Addition or ADU Really Cost in Central Florida?
At Pro Work, we use a transparent per-square-foot pricing model for home additions and ADUs. This ensures you know exactly what each level of finish includes and what you are investing in. Our services in Central Florida deliver quality results on every project.
How Pro Work Prices Additions & ADUs
Whole home remodeling clients typically approach us in one of two ways. Both are the right starting point, and Pro Work is built to work with either.
Approach 1-
Design to a Fixed Budget
If you have a clear budget in mind, share it with us from the start. This helps our team create a phased or full-scope design that maximizes your investment, focusing on the spaces that offer the greatest impact for your lifestyle and resale value.
At Pro Work, we are upfront about fit. We are a premium design-build firm, so if your main goal is the lowest possible price, we may not be the right choice. But if you want the best results your budget can achieve, we are exactly the team you want to work with.
Approach 2-
Let the Design Drive the Budget
If you have a vision for what your home could become and want to understand the full investment required to make it a reality, our design and consultation process is the perfect starting point.
We will develop room-by-room design concepts, present finish options across multiple investment levels, and guide you in making confident, informed decisions about where your budget will create the greatest long-term impact on your home.
What Drives the Cost of a Whole Home Remodel?
Before reviewing pricing tiers, it helps to understand the variables that most significantly shape where your project lands on the cost spectrum.
How large is your home?
Square footage is the most significant cost factor in a whole home remodel. Larger spaces require more flooring, more paint, more fixtures, additional labor, and more materials in every category. To provide the most accurate starting point, our pricing tiers are structured according to home size, helping you understand how your project scale affects your investment.
How many rooms and systems are being touched?
A whole home remodel that includes the kitchen, bathrooms, flooring, paint, and lighting throughout costs significantly more than a project focused on cosmetic updates in select rooms. The overall scope, including how many rooms and systems are involved, is the second largest cost driver after square footage.
Are any structural or layout changes required?
Removing walls, reconfiguring floor plans, relocating plumbing stacks, or upgrading electrical panels adds significant cost to any project. These structural changes are often what unlock the full potential of a home, but they require an honest evaluation of the scope upfront. Pro Work identifies all structural considerations during the design phase to ensure your project is planned accurately and efficiently.
What finish level are you targeting?
The difference between Basic and Premium finishes in cabinetry, countertops, flooring, tile, fixtures, and hardware can amount to hundreds of thousands of dollars across a whole home. Pro Work provides carefully curated options at every tier so you can clearly see what each level of investment delivers before making any decisions.
How long do you plan to stay in your home?
If this is your forever home, investing in Premium materials and timeless design provides lasting value in both everyday living and long-term resale appeal. If you plan to sell within a few years, a well-executed Mid-level remodel often offers the strongest return on investment while still enhancing your home’s appearance and functionality.
How Pro Work Prices Additions & ADUs
Unlike whole home remodels, which can vary greatly depending on existing conditions, additions and ADUs are priced mainly based on the square footage of new construction and the finish level you select. Pro Work uses three per-square-foot pricing tiers that reflect real Central Florida construction costs:
What Each Pricing Tier Delivers
BASIC
$275 / sq ft
- Standard framing, insulation & drywall throughout
- Ceramic or porcelain tile flooring in wet areas, LVP or carpet in living areas
- Semi-custom cabinetry (where applicable)
- Standard plumbing fixtures — sink, toilet, shower/tub
- Standard electrical — outlets, switches, basic lighting
- Standard HVAC connection or mini-split unit
- Entry-level quartz or granite countertops
- Clean, functional finishes throughout
MID
$325 / sq ft
- Upgraded framing and insulation for improved energy performance
- Porcelain tile or engineered hardwood flooring throughout
- Custom overlay cabinetry with upgraded hardware
- Upgraded plumbing fixtures — designer faucets, rainfall shower
- Full electrical package — recessed lighting, under-cabinet, ceiling fans
- High-efficiency HVAC with zoned climate control
- Mid-level quartz countertops with upgraded edge profiles
- Elevated finishes that align with the character of the main home
PREMIUM
$375 / sq ft
- Premium framing, spray foam insulation, and advanced soundproofing
- Hardwood, large-format porcelain, or natural stone flooring throughout
- Full custom inset cabinetry with premium hardware
- High-end plumbing fixtures — freestanding tub, thermostatic controls, luxury faucets
- Full electrical and smart home integration — lighting scenes, smart locks, audio
- Premium high-efficiency HVAC with multi-zone control
- Quartzite or exotic natural stone countertops
- Exterior finishes matched precisely to existing home — seamless architectural integration
HOME ADDITION PRICING EXAMPLES
Attached or detached additions — bedrooms, family rooms, offices, in-law suites
The following examples show total project investment at each finish tier for common addition sizes. Use these figures as a planning benchmark, while your actual investment will be confirmed after an on-site consultation.
300 Sq Ft Addition (Guest suite, home office, or room expansion)
SQ FT
300 sq ft
BASIC ($275/sqft)
~$82,500
MID ($325/sqft)
~$97,500
PREMIUM ($375/sqft)
~$112,500
500 Sq Ft Addition (Primary suite, family room, or multi-room expansion)
SQ FT
500 sq ft
BASIC ($275/sqft)
~$137,500
MID ($325/sqft)
~$162,500
PREMIUM ($375/sqft)
~$187,500
750 Sq Ft Addition (Large suite, studio, or full floor addition)
SQ FT
750 sq ft
BASIC ($275/sqft)
~$206,250
MID ($325/sqft)
~$243,750
PREMIUM ($375/sqft)
~$281,250
1,000 Sq Ft Addition (Major addition — in-law suite, large family room, or second floor)
SQ FT
1,000 sq ft
BASIC ($275/sqft)
~$275,000
MID ($325/sqft)
~$325,000
PREMIUM ($375/sqft)
~$375,000
ADU PRICING EXAMPLES
Detached guest houses, garage conversions, above-garage apartments & in-law suites
ADUs are priced using the same per-square-foot model as additions. The examples below represent the most common ADU sizes in the Central Florida market, ranging from compact rental units to full guest houses.
400 Sq Ft ADU (Studio or compact one-bedroom — ideal for rental income or home office)
SQ FT
400 sq ft
BASIC ($275/sqft)
~$110,000
MID ($325/sqft)
~$130,000
PREMIUM ($375/sqft)
~$150,000
600 Sq Ft ADU (One-bedroom — the most popular ADU size for rental or family use)
SQ FT
600 sq ft
BASIC ($275/sqft)
~$165,000
MID ($325/sqft)
~$195,000
PREMIUM ($375/sqft)
~$225,000
800 Sq Ft ADU (One or two-bedroom — excellent for long-term rental or in-law suite)
SQ FT
800 sq ft
BASIC ($275/sqft)
~$220,000
MID ($325/sqft)
~$260,000
PREMIUM ($375/sqft)
~$300,000
1,000 Sq Ft ADU (Two-bedroom — maximum size for most Central Florida municipalities)
SQ FT
1000 sq ft
BASIC ($275/sqft)
~$275,000
MID ($325/sqft)
~$325,000
PREMIUM ($375/sqft)
~$375,000
Key Factors That Influence Your Final Investment
Site conditions and foundation requirements
The condition and grade of your lot has a major impact on foundation costs. A flat, clear lot with easy access provides the most cost-effective starting point. Sloped lots, poor soil conditions, or limited site access can add significant costs to the foundation and site preparation phases.
Attachment type — attached vs. detached
Detached additions and ADUs usually cost more per square foot than attached structures because they need their own foundation, roof system, and utility connections. Attached additions can share some existing structural and mechanical systems, which helps reduce the overall cost of the project.
Utility connections for ADUs
ADUs require independent electrical, plumbing, and HVAC connections, and in some cases, separate meter installation. The distance of your existing utility infrastructure from the ADU site influences the cost of these connections. Pro Work assesses all utility requirements carefully during the planning phase to ensure accurate budgeting and seamless installation.
Garage conversions vs. new construction
Converting an existing garage into an ADU is usually the most cost-effective option because the foundation, framing, and roof are already in place. New detached construction costs more but offers complete design freedom and can be located anywhere on your lot within local zoning guidelines.
Exterior finish matching
At Mid and Premium tiers, Pro Work matches exterior finishes such as siding, roofline, windows, and trim to your existing home, ensuring the addition or ADU feels fully integrated rather than appearing tacked on. This attention to detail increases the investment but significantly enhances the finished result and your property’s overall market appeal.
Pro Tip: We recommend budgeting 5–10% of your total project cost as a contingency, particularly for ADUs and additions where site conditions may not be fully known until excavation or demolition begins. Pro Work identifies as many of these conditions as possible during the planning and design phase to minimize surprises.
Everything Is Included — That's the Pro Work Difference
Pro Work includes everything in your project estimate upfront. No hidden fees. No add-ons after the fact. No surprises mid-construction.
INCLUDED IN EVERY PRO WORK DESIGN-BUILD REMODEL
As a full-service design-build firm, Pro Work includes the following in every whole home remodel — no surprises, no hidden line items, no add-ons after the fact.
✓ Space planning, architectural design & 3D walkthroughs
✓ Dedicated project manager from permit to final walkthrough
✓ All labor within the defined scope of work
✓ All materials within the defined scope of work
✓ Permit fees, Pro Work manages all permitting, zoning & inspections
✓ Painting & finishing throughout the new construction scope
✓ Electrical, plumbing & HVAC within defined scope
✓ Flooring throughout the addition or ADU
✓ Light fixtures (per agreed selections)
✓ Itemized, transparent pricing before any work begins
✓ Clear, consistent communication throughout every phase
Frequently Asked Question — Additions & ADU Costs
A home addition increases your existing living space by adding a room, suite, or floor that is connected to and functions as part of your main home. An ADU is a fully self-contained secondary dwelling on the same property, with its own kitchen, bathroom, and sleeping area, operating independently from the main house. Both types of projects are built using the same Pro Work design-build process and follow the same per-square-foot pricing model, ensuring clarity and consistency for every investment.
Yes, ADU regulations differ across Central Florida, as each city and county sets its own zoning rules, size limits, setbacks, and utility requirements. What is allowed in one area may need extra approvals in another. Pro Work guides you through these local rules during planning to ensure your ADU project meets all codes.
The timeline for building a home addition or ADU in Central Florida varies based on size, complexity, and site conditions. Simple projects may take a few months, while larger or more detailed builds can take six months or more. Pro Work manages every phase carefully to ensure your project is completed on schedule and to high-quality standards.
Whether you can rent out your ADU on a short-term basis depends on local regulations in your city or county. Some areas allow short-term rentals, while others require permits or restrict them entirely. Pro Work helps you understand these rules during the planning phase so your ADU can comply with all local requirements.
Yes, at Pro Work, we match exterior finishes such as siding, rooflines, windows, and trim to your existing home. This ensures that your addition or ADU feels fully integrated rather than appearing separate. Careful attention to design and detail helps your project blend seamlessly, enhancing both the look and value of your property.
No, you do not need to hire a separate architect. Pro Work is a full design-build firm, so our team handles both design and construction. We develop detailed plans, select finishes, and manage every aspect of your home addition or ADU, ensuring a seamless process from concept to completion without involving outside architects.
Yes, adding an ADU can significantly increase your property value. It provides additional living space, potential rental income, and flexibility for family or guests. A well-designed ADU built with quality materials enhances both the functionality and market appeal of your home, making it a smart long-term investment.
