Considering expanding your home or constructing a detached mother-in-law suite? Check out Larsa Construction's guide, your dependable general contractor and builder in Orlando, FL, for a comprehensive process breakdown.

Costs play a significant role in your planning process - we know this as your local general contractor who specializes in home additions and ADU construction. Finding the right mix of quality and budget-friendly options needs proper evaluation.

This complete guide breaks down ADU construction costs, from permit requirements to material expenses. You'll learn about the factors that influence pricing and how to plan your budget effectively for your Orlando ADU project.

Understanding ADU Construction Costs in Orlando

ADU investments rank among the smartest property decisions Orlando homeowners can make in 2025. Our team at Larsa Construction has helped many clients direct their way through Orlando's ADU construction costs.

What is an ADU and why build one in 2025?

ADUs are secondary housing units that share property with single-family homes. These adaptable structures can be attached to your main house, built as standalone units in your backyard, or created by converting your garage. We at Larsa Construction have seen their popularity grow, and with good reason too:

• They generate rental income that helps pay your mortgage

• You can house aging parents or adult children

• Your property value goes up

• They work great as guest spaces or home offices

• They're a great alternative to assisted living facilities for family members

The design phase is a vital part of making sure your ADU can adapt to future needs. To name just one example, building with universal design standards from the start costs less than trying to update them later.

Average ADU construction costs in Orlando, FL

Orlando homeowners should budget $120-$400+ per square foot for ADUs between 500 and 1,200 square feet. This means a total investment of about $75000-$279,000 based on several factors.

Here's how the costs break down:

• Vertical construction takes 80-85% (structure and standard finishes)

• Design and engineering runs about $4500 - $12,000+

• Permits cost $2-$14 per square foot

• Site work typically adds $7000-$30000+

• Utility upgrades might need $8000-$50,000+

  
  

How 2025 market trends are affecting prices

Construction costs have jumped by a lot over the last several years. Florida's Construction Cost Index rose 15-20% from January 2021 to January 2024. So, an ADU that cost $300,000 to build in 2021 would now cost about $410,000 in 2025.

Material and labor costs keep changing in Central Florida. We take pride in giving our clients clear, up-to-date pricing for their Orlando Home Additions and ADU projects. Size affects your budget, but even smaller ADUs need substantial investment because of fixed development costs.

Orlando allows ADUs between 500-1,000 square feet on qualifying properties. Your lot needs to meet size requirements too - you'll need at least 7,700 square feet for a small ADU.

Want to see how an ADU could boost your property value? Reach out to Larsa Construction your trusted general contractor today for a customized consultation on your Orlando home addition or ADU project.

Key Factors That Influence ADU Cost

Planning an ADU project in Orlando? Several factors can affect your bottom line. Larsa Construction has identified the main elements that determine ADU construction costs in Orlando FL.

Size and type of ADU (garage conversion, detached, etc.)

Your choice of ADU type has a dramatic effect on your budget. Garage conversions are the most affordable option at $55,000 to $150,000+ Attached ADUs cost between $100,000 to $216,000. Detached structures—completely independent from your main home—range from $110,000 to $285,000. Size plays a vital role, with costs averaging $120 to $300 per square foot. Some projects can reach $600 per square foot.

Permits, zoning, and local regulations

Orlando allows ADUs in all Residential (R) zones, Mixed Residential-Office (MXD) districts, and Office Low/Medium Intensity zones. Your lot must meet minimum size requirements. Building permits cost $1,350 on average. Orlando's fees typically range from $2 to $14 per square foot. Note that ADUs must match your main house's exterior design and follow setback requirements.

Material and labor costs in Central Florida

Materials make up about 45-50% of your total project cost. These include:

• Lumber, sheathing, and joists

• Roofing materials and windows

• Doors, trim, and finishing elements

Construction costs have risen 15-20% from 2021 to 2024. This is a big deal as it means that current pricing needs careful attention.

Utility connections and site preparation

Site preparation adds $7000- $25000 to your project. Utility connections cost between $10,000 to $30,000. Water and sewer connections run $5,000-$15,000.

Larsa Construction, your dedicated Orlando general contractor, provides detailed cost assessments for your specific ADU project. Each property comes with its own unique challenges. Contact us today for a personal consultation on your home addition or ADU project.

Cost Breakdown by ADU Type

Orlando homeowners can make better decisions about their construction projects by knowing the exact costs of different ADU types. Our team at Larsa Construction has helped many clients choose the right options based on their needs and budget.

Garage conversion ADU

Garage conversions are the most affordable ADU option in Orlando. The cost ranges from $55,000 to $150,000+. These projects are affordable because they use the existing foundation, frame, and roof.

A typical garage conversion has these costs:

• Window installation.

• Standard entry doors replacing garage doors.

• Insulation and soundproofing.

• Flooring options from $5 per square foot for vinyl to $14 per square foot for hardwood

Garage conversions are nowhere near as expensive as new structures. They add value to your property by transforming unused space into valuable living areas.

Detached backyard cottage

Detached ADUs need separate construction and utilities, which makes them costlier than conversions. These standalone units cost between $110,000 and $285,000. Larger or luxury units can reach $400,000.

Florida's detached ADUs cost $120 to $400+ per square foot. Vertical construction takes up 80-85% of the total cost. The final price depends on your unit's size, design complexity, and material quality.

Larsa Construction, your trusted general contractor & builder in Orlando FL, provides clear estimates based on your property's specific needs.

Above-garage or second-story ADU

Above-garage ADUs cost between $128,000 and $225,000. Complex designs can reach $440,000. These units need extra structural support to handle the weight above your garage.

The cost per square foot ranges from $160 to $344. This varies based on complexity and finish quality. Above-garage units might cost more than conversions, but you keep your parking space while adding living quarters.

Each ADU type offers great long-term value through rental income or multi-generational living. Contact our Larsa Construction team today to learn which ADU type works best for your Orlando property. We'll provide a detailed consultation and cost estimate.

How to Budget and Plan for Your ADU Project

Building an ADU project needs smart budgeting to stay on track financially. Our team at Larsa Construction helps Orlando homeowners through this process every day.

Setting a realistic budget range

Orlando homeowners should know that ADU construction costs range between $120-$400+ per square foot. A standard-sized unit typically runs $199,000-$279,000. Your budget needs to cover:

• Design and planning expenses

• Permit fees

• Site prep costs averaging

• Utility upgrade expenses

  
  

Working with a general contractor in Orlando

Your Orlando ADU project needs the right general contractor. Larsa Construction makes the property permitting process smooth and simple. Quality contractors should provide:

• Clear updates throughout the build

• Affordable solutions that match your budget

• Help with budget-friendly material selection

• Knowledge of Orlando's ADU rules and regulations

A good contractor must understand the unique challenges and possibilities that come with ADU construction in Central Florida.

Avoiding hidden costs and delays

Smart homeowners set aside 10% of their construction budget for unexpected costs. Watch out for these extra expenses that often slip through:

• Extra utility meters for rental ADUs

• Required solar panel installations

• Higher property taxes after completion

• Cleanup and disposal costs

• Outdoor work and landscaping

Simple designs, early permit submissions, and quick material decisions keep projects on schedule. Larsa Construction helps Orlando homeowners direct these complex processes while getting the most value. Let's talk about your ADU project today.

Conclusion

ADU construction is a major investment for Orlando homeowners. Costs typically range from $120 to $400+ per square foot. Our team at Larsa Construction knows what this means for you. We'll guide you through everything from your original plans to the finished build.

Your ideal ADU choice depends on what you need, how much space you have, and your budget. A garage conversion starts at $55,000, while a detached unit can go up to $285,000. Each option adds value to your property differently.

Success in ADU construction comes down to good planning and solid budgeting. You'll need backup funds, proper permits, and a clear picture of utility costs to avoid surprises during construction.

Want to begin your ADU experience? Larsa Construction is your trusted general contractor & builder in Orlando FL. We'll bring your ADU ideas to life. Get in touch today for a detailed consultation and find out how we can help realize your property's full potential with a well-planned ADU.