If you're researching sunroom replacement window costs, you're not alone. Many Florida homeowners are looking to upgrade older glass enclosures, improve energy efficiency, and make their spaces more comfortable year-round.
But here’s something important to know:
Most homes in Florida don’t actually have traditional sunrooms — they have lanais.
At Crystal Clear Windows & Doors, we specialize in transforming existing lanais into fully enclosed, comfortable living spaces for homeowners throughout Pinellas and Hillsborough County — featuring impact-rated windows that provide storm protection, energy efficiency, and the feel of a true sunroom at a more practical cost.
Average Sunroom Replacement Window Cost in 2026
In 2026, the cost to replace windows in a sunroom depends on materials, size, and whether you choose impact-resistant glass.
- Standard windows: $500 – $1,100 per window installed
- Impact windows: $1,200 – $2,500 per window installed
- Typical project total: $5,000 – $15,000+
In Florida, most homeowners opt for impact-rated windows due to hurricane protection, energy efficiency, and insurance benefits.
What’s the Difference Between a Sunroom and a Lanai?
Sunroom
- Fully built addition to the home
- Often includes insulated walls and HVAC
- Designed as interior living space
Lanai (Most Common in Florida)
- Covered outdoor space (usually with screens)
- Attached to the home under the existing roofline
- Not originally enclosed with glass
Here’s the key difference:
A sunroom is built from the ground up — while a lanai can be upgraded into a similar space for significantly less cost.
Cost to Convert a Lanai to an Enclosed Space
For Florida homeowners, converting a lanai is often the more practical investment.
- Basic enclosure (non-impact): $4,000 – $10,000
- Impact window enclosure: $8,000 – $20,000+
The final cost depends on:
- Number of openings
- Window type and size
- Framing and structural adjustments
- Permit requirements
Sunroom vs Enclosed Lanai: Which Is Right for You?
| Feature | Sunroom | Enclosed Lanai |
|---|---|---|
| Cost | Higher | More affordable |
| Construction Time | Longer | Faster |
| Uses Existing Structure | No | Yes |
| Popular in Florida | Less common | Very common |
For most homeowners in Tampa, St. Petersburg, and surrounding areas, enclosing an existing lanai delivers the best value.
Upgrade Your Lanai Into a Comfortable Living Space
If you're searching for sunroom window replacement, there's a good chance what you really need is a professional lanai enclosure.
At Crystal Clear Windows & Doors, we help homeowners across Pinellas and Hillsborough County transform underused outdoor spaces into beautiful, functional areas you can enjoy year-round.
- Custom-fit window solutions
- Impact-rated options available
- Expert installation
- Built to Florida building codes
Get a Free Estimate
Ready to upgrade your space?
Contact us today for a free estimate and see how easy it is to upgrade your space.
