How much does a sunroom cost?
Sunroom cost in Florida ranges widely — from about $5,000 for a basic screen room to $80,000 or more for an insulated, climate-controlled four-season room — according to industry cost data from sources like HomeGuide and Angi. The type drives everything: a screened space, a glassed three-season room, or a fully insulated four-season room are very different builds. In Florida, where indoor-outdoor living is a way of life, a sunroom (or "Florida room") is a popular addition — and often the most cost-effective version starts with converting an existing lanai or porch.
Key takeaways
- Sunroom cost spans ~$5,000 (screen room) to $80,000+ (four-season glass room).
- Three-season rooms are enclosed but not climate-controlled; four-season rooms are insulated with HVAC.
- Converting an existing lanai or screened porch is often the cost-effective path.
- A sunroom is a structure — it needs a permit and must meet wind-load code.
- A well-built four-season room adds usable living space and value.
Table of contents
- What a sunroom costs
- The types compared
- Converting a lanai or porch
- What drives the price
- Permits and wind code
- Where to start
- FAQ
What a sunroom costs
Sunrooms are priced by type and size. Here's the 2026 picture from HomeGuide's sunroom cost data:
| Type | Typical cost | What it is |
|---|---|---|
| Screen room | ~$5,000–$15,000 | Screened enclosure, no glass |
| Three-season sunroom | ~$15,000–$35,000 | Enclosed/glass, not climate-controlled |
| Four-season sunroom | ~$30,000–$80,000+ | Insulated, glass, HVAC, year-round |
| Lanai/porch conversion | varies (often less) | Builds on existing structure |
A worked example: screening in a patio on an Orlando home is the budget end, while building a fully insulated, glassed four-season room with its own cooling is a major addition costing into the five figures. Where you land depends almost entirely on which type you choose — decide that first.
The types compared
The core decision is how enclosed and conditioned you want the space:
- Screen room — a screened enclosure (think a built-out lanai). Cheapest, great for bug-free outdoor living, but open to the weather and heat.
- Three-season room — enclosed with glass or windows but not insulated or climate-controlled. Comfortable spring, fall, and winter, but hot in Florida's peak summer without AC.
- Four-season room — fully insulated with proper glass and its own HVAC, usable year-round in any weather. The most expensive but the most livable, and it counts as true conditioned space.
In Florida, the summer heat is the deciding factor between three- and four-season: a three-season room may be unusable on a 95-degree afternoon, while a four-season room (often cooled by a mini split) stays comfortable. Choose based on how you'll actually use the room across the year.
Converting a lanai or porch
The most cost-effective sunroom in many Florida homes starts with what's already there. A large share of Central Florida homes have a screened lanai or covered porch, and converting that existing structure into a sunroom is often cheaper than building from scratch, because the footing, slab, and roof may already exist. You're upgrading the enclosure rather than building a whole addition.
The cost depends on how far you take it: adding glass to a screened lanai is modest; insulating it and adding HVAC for a four-season room is more. If you're starting from an existing screened enclosure that needs work anyway, folding a sunroom conversion into that project can make sense. A contractor can assess whether your existing structure is sound enough to build on.
What drives the price
Several factors move a sunroom quote. Type (screen vs. three- vs. four-season) is the biggest by far. Size scales the cost. Whether you're building new or converting an existing lanai changes the foundation and roof work. HVAC for a four-season room adds cost (and may need electrical capacity). Glass quality — energy-efficient, impact-rated — matters in Florida. And foundation and roof work, if building from scratch, is significant.
Get the quote to specify the type, the glass, whether HVAC is included, and the foundation/roof scope. The gap between a screen room and a four-season room is enormous, so make sure you and the contractor are pricing the same thing.
Permits and wind code
A sunroom is a structure, so in Florida it requires a permit and inspections and must meet building and wind-load codes — this isn't optional, and it matters for both safety and resale. The licensed contractor pulls the permit under their own license, and the inspections confirm the addition is built to withstand Florida's wind.
This is especially important because a poorly built or unpermitted addition can be a liability in a storm and a problem when you sell (unpermitted additions raise red flags at closing). Confirm the contractor is licensed and insured, that permitting is included, and that the build — especially the glass and roof attachment — meets wind code for your area. The same verification habit from our contractor license guide applies to a project this size.
Where to start
Start by deciding which type fits how you'll use the room across Florida's seasons — and whether you can convert an existing lanai. Our screen enclosures directory and Orlando city page list local companies for screen rooms and sunrooms, with more across the full directory. Get the type and scope itemized, confirm permitting and wind code, and consider a mini split for a four-season room and a paver floor to finish the space.
FAQ
How much does a sunroom cost in 2026? Industry cost data spans widely — a screen room from about $5,000–$15,000, a three-season sunroom around $15,000–$35,000, and a four-season (insulated, glass, climate-controlled) room $30,000–$80,000 or more. The type drives the cost.
What's the difference between a three-season and four-season sunroom? A three-season room is enclosed but not insulated or climate-controlled — comfortable most of the year but hot in peak summer. A four-season room is insulated with proper glass and HVAC, usable year-round but more expensive.
Can I convert my lanai or screen porch into a sunroom? Often, yes — converting an existing screened lanai or porch is a common, cost-effective path since the footing and roof may already exist. The cost depends on how far you go (screen, glass, insulation, HVAC).
Do sunrooms need a permit in Florida? Yes. A sunroom is a structure that must meet building and wind-load codes, so it requires a permit and inspections, pulled by the licensed contractor. This matters for both safety and resale.
Does a sunroom add value to a Florida home? It can, especially a well-built four-season room, by adding usable living space in a state where indoor-outdoor living is prized. A cheap, poorly built addition adds less, so build it to code and to last.