One of The Exterior Living Company's recently renovated three-season sunrooms.
The exterior of a three season room lit up at night.

Three-Season Sunrooms

Summertime Just Got an Extension

Enjoy more of the seasons with a professionally designed, built, and insulated three season room.

Panels of resurfaced wood for decorative appeal.

Embrace Outdoor Living

Reconnect with nature on a sunny summer afternoon, or enjoy your coffee on a crisp fall morning. Three-season sunrooms are designed to shelter you from the elements while allowing for all the pleasures of being outdoors. Used primarily in spring, summer and fall, three season rooms forgo internal heating and insulation, making them a cost-effective option for outdoor living spaces.

Expert Design

An ELC sunroom contractor will work closely with you to capture your wishlist items in a stunning final design. We offer a variety of interior finish options, ensuring your space reflects your personality and compliments your home. Materials we’ve used in three-season sunrooms include:

  • Smooth or rough-sawn cedar
  • Cedar tongue and groove
  • Board and batten
  • Shiplap
  • Beadboard or wainscoting
  • Exposed or faux brick/stone veneer

Added Value

A well-designed three-season sunroom can add significant value to your home. These sunrooms add extra living space and offer a versatile environment for entertaining or relaxing with your family. Got an existing screened-in porch? Elevate your space and expand your horizons with a sunroom conversion.

The Process:
Sunroom Additions

1

Design

Fill out our contact form and schedule a visit. We'll come to your home, gather your ideas, and explore sunroom add-on options to meet your needs.

2

Plan

After our initial visit, you'll receive a personalized, no-obligation estimate. If you decide to proceed with your three season room addition, we'll finalize the project details, timeline, and contract.

3

Build

Our team takes care of all preparations, including material orders, new build permits, and installation. When the project is finished, we conduct a quality check to ensure everything meets your expectations and our standards. Before we wrap up, we'll make sure your new outdoor sunroom is exactly as you envisioned.

Frequently Asked Questions

What is a three season sunroom?

A three season sunroom is an enclosed living space designed for use in spring, summer, and fall. Three season rooms allow for plenty of natural light but forgo internal heating and insulation, making them a cost effective alternative to four season sunrooms. A sunroom add-on gets you closer to nature, while sheltering you from the elements.

Can my existing porch or deck be converted into a three-season sunroom?

Absolutely. During our consultation, we ensure that your existing surface can support the weight of the walls and roof. If necessary, we will reinforce the footing to accommodate your new outdoor sunroom. Ask your ELC sunroom contractor about enclosing an existing foundation to create a usable living space.

How does a three season room differ from a screened-in porch?

A three season room is a fully enclosed space featuring solid windows and doors. While screened-in porches offer overhead shelter, they typically feature mesh siding for a more open-air environment. The solid walls and windows provide extra insulation, meaning you can enjoy your three season sunroom well beyond summer.

Can I use my three season room in the winter?

The lack of heating and insulation make a three season add-on ideal for use in spring, summer, and fall. However, with a space heater and a blanket, many customers enjoy their outdoor sunroom year-round.

Do three-season sunrooms require a permit?

In most cases, you will need a permit for a new build such as a sunroom. We’ve got it covered! An ELC three season room contractor will file any necessary permits. We will also help prepare HOA paperwork if needed.

Will a sunroom addition add value to my home?

A sunroom addition can add significant value to your home. Any well-designed outdoor living space significantly increases marketability and curb appeal. However, the square footage of an unheated space cannot be used for appraisal purposes.

For a heated and insulated space that does add technical square footage to your home’s appraisal value, check out our four season sunrooms.

Get inspired

Pay over time with exclusive financing options*GreenSky

No Interest if Paid in Full in 18 Months

Plan 1066. Interest accrues on the promotional (special terms) purchase at the regular APR for Purchases; however, interest will not be charged if the purchase is paid in full within the promotional period. Minimum monthly payments are required; however, paying only the minimum payment each month will not pay off the purchase balance within the promotional period. To avoid interest charges, the customer must either pay more than the minimum monthly payment or make a lump sum payment before the end of the promotional period.

Reduced Rate of 8.99% for 60 Months

Plan 3392. Customers make monthly payments with a Special Rate over a specified time period. Special Rate continues to apply until the qualifying purchases are paid in full. 2.0888% payment factor.

*This credit card is issued by Wells Fargo Bank, N.A. Special terms apply to qualifying purchase charged with approved credit. Minimum monthly payments are required during the promotional (special terms) period. Interest will be charged to your account from the purchase date at the APR for Purchases if the purchase balance is not paid in full within the promotional period. Paying only the minimum monthly payment will not pay off the purchase balance before the end of the promotional period. For new accounts, the APR for Purchases is 28.99%. If you are charged interest in any billing cycle, the minimum interest charge will be $1.00. Regular monthly payments are generally 3.5% of the amount financed, or $40, whichever is greater. See credit card agreement for details. ​This information is accurate as of 01/08/2025 and is subject to change. For current information, call us at 1-800-431-5921.

Get Ready to Soak Up the Sun

Our three-season sunrooms are designed and built to bring you the ultimate balance of indoor and outdoor living.
An indoor/outdoor living space.