2022 Sunroom Costs | 3 & 4-Season Room Addition Prices

Sunroom Cost

A sunroom costs $100 to $350 per square foot on average. A 3-season room costs $8,000 to $50,000 to build, and a 4-season room costs $20,000 to $80,000 to add. A sun porch or prefab sunroom addition costs $5,000 to $30,000, and a glass solarium costs $30,000 to $150,000.

Connect with home addition contractors near you for an accurate estimate, or view the sunroom sizes and prices below.

An all-season or 4-season room is integrated into the existing construction of the home with insulation, electricity, an HVAC. Three-season sunrooms are separate structures from the house and lack those amenities.

The main cost factors in building a sunroom are:

States like New York, New Jersey, Massachusetts, Florida, or the Bay Area in California have higher costs of living, which can increase sunroom prices by up to 50%.

The average sunroom costs $100 to $350 per square foot for materials and installation, depending on the quality, finishes, and foundation. The cost to build a 3-season room is $80 to $230 per square foot, while a custom-built four-season sunroom runs $200 to $400 per square foot.

A four-season sunroom costs $200 to $400 per square foot or from $20,000 to $80,000 to add on average, depending on the size, materials, finishings, and foundation. An all-season or 4-season room is integrated into the existing construction of the home to provide an extension of living space.

A four-season room addition is temperature-controlled with insulated walls, ceiling, and flooring, and openly connects to the rest of the house. Another option is adding a connecting door and separate heating and cooling system to keep utility bills down.

A 3-season room costs $8,000 to $50,000 on average, depending on the size, materials, finishing options, and foundation status. The average cost to build a three-season room addition is $80 to $230 per square foot based on whether it's a prefab porch enclosure or custom-built.

The cheapest 3-season rooms are prefab kits, screened-in porches, and enclosed patios with single-pane glass that are installed on an existing patio or deck. Costs increase for custom-built rooms with tinted, dual-pane glass windows, and a concrete foundation.

Three-season sunrooms lack insulation and electricity, which makes them hotter in the summer and colder in the winter than 4-season models. Although heating or cooling systems can be installed separately from the home.

A solarium costs $30,000 to $100,000 on average, depending on the size and whether it's a 3-season or 4-season extension. The cost of building a solarium addition ranges between $300 and $800 per square foot. A solarium is a glass room in the house with a glass roof.

A solarium needs a foundation and typically takes two to four weeks to build. Reputable contractors usually include a lifetime warranty on the glass. These high-quality sunrooms provide abundant natural light thats also ideal for plants and flowers.

A home conservatory addition costs $50,000 to $150,000 or more, with prices ranging from $200 and $600 per square foot to install. High-end residential or commercial conservatories cost $600 to $1,200 per square foot to build.

A conservatory is a deluxe sunroom with a foundation, insulation, electricity, HVAC, and glass ceilings. The roof panels are angled to form a central peak that bisects the structure. A conservatory meets all building code requirements and qualifies as a full home addition.

A greenhouse sunroom or garden room addition costs $2,000 to $30,000 on average, depending on the type. Prefab garden room kits range from $10 to $25 per square foot, depending on the size, features, and quality.

While some greenhouses are all glass, models are available with plastic panels made of fiberglass, polycarbonate, or polyethylene film. Greenhouses traditionally lack a foundation and insulation, which separates them from true sunroom living spaces. Although, you still may need a permit.

An atrium is an open interior room with a glass roof. A glass atrium addition costs $6,000 to $20,000 for the roof, which requires structural modifications, plus HVAC work for temperature control. Contractors need to review the blueprints and perform an on-site inspection to provide an accurate quote. Atrium additions are a cost-efficient way to bring natural light into the home.

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There are different types of sunrooms across a wide variety of prices. Costs increase as you add more features in each category.

Sunroom prices vary depending if they are prefabricated or custom-built.

*Additional costs may apply for shipping, assembly, and site-work.

Labor includes foundation work, construction or assembly, insulation, electricity, HVAC, and finishing work that meets building code regulations.

A sunroom foundation costs $1,000 to $6,000 or from $5 to $15 per square foot on average, depending on the type. Site-built sunrooms require a proper building foundation, while prefab sunroom kits may be assembled onto an existing wooden deck or patio with a level surface.

Sunroom foundation requirements vary depending on local building codes. Using an existing deck or concrete slab may require repairs, leveling, and reinforcing for additional support. Minor foundation repairs for a slab or deck repairs cost $500 to $2,500. Even with repairs, not all decks are suitable to support the weight of a sunroom.

Additional site preparation costs apply when building a new foundation for a sunroom such as land clearing, tree removal, excavation, and landscaping.

Sunroom framing is typically aluminum, vinyl, wood, or resin plastic. Three-season sunrooms use has cheaper frames such as aluminum, resin, and vinyl. Higher-quality 4-season sunrooms and conservatories are built with expensive wooden or insulated vinyl framing.

Sunroom insulation costs $300 to $1,500 or $1 to $3 per square foot, depending on the product used. Other ways to insulate a sunroom are curtains, insulated panels, dual-pane windows, protecting under the deck, and sealing the joints. A screen room or three-season sunroom doesnt require insulation.

A sunroom roof costs $500 to $7,000, depending on the size, style, and if it's a glass-enclosed or a solid-covered shingle roof. A glass solarium roof with a steel structure costs the most, while an asphalt, metal, or slate-covered roof costs between $500 and $3,500.

*Based on the average sunroom size of 150 to 300 square feet.

Other elaborate designs include the cathedral, curved-eave, mansard, and pyramidal roofs.

Sunroom windows cost $3,500 to $12,000 on average for 10 new or replacement windows, depending on the quality and type. Non-insulated windows for a three-season sunroom are cheaper than dual-pane insulated windows for a four-season room or solarium.

Other options are plastic film, polycarbonate plastic windows, or screens. Contractors recommend upgrading to dual-pane glass to increase the energy efficiency, which may require new window frames that seal properly.

Installing French or sliding glass doors costs $700 to $2,400, which can replace walls, provide natural light, and create stunning views to the outdoors. Other options include patio doors, single-entry, telescoping, or bi-fold doors at varying costs. Most prefabricated sunrooms come with doors.

Hiring an electrician costs $40 to $100 per hour, plus a $75 call-out fee on average. Expect to spend a total of $250 to $600 or more to install the wiring for an average sunroom. If the contractor doesnt include electrical work in their quote, other potential costs include:

Most 3-season sunrooms dont have electrical connections, but some prefabricated units come with built-in electrical components. In some cases, you may need to upgrade an old electrical panel to provide more power to the sunroom.

Adding or expanding the HVAC system costs $300 to $5,000 to bring heating and cooling into the sunroom. The cheapest options are extending the existing ductwork, installing a ceiling fan, or using a window AC unit with a space heater.

Additionally, installing a mini-split AC unit costs $660 to $4,500, which provides both heating and cooling without ducts.

When adding heating and cooling systems to 3-season rooms, be sure to install insulation first to avoid high utility bills.

After building the sunroom, extra costs of $4 to $50 per square foot may apply for painting, flooring, shutters or blinds, interior design and decor, and other interior finishes. Be sure to ask contractors what finishes are included in their bid.

Also, consider what type of furniture you want in your sunroom. Modern decor includes a couch, a few chairs, a bookcase with large shelves, or even a dining table.

Most sunroom contractors include debris removal and site cleanup in their estimate. If it's not included, dumpster rental prices are $280 to $485 per week, and cleaning a construction site costs $300 to $700 on average.

Building permits are required to build a sunroom, even for small DIY sunroom kits or custom-built room additions. A building permit for a sunroom costs $200 to $500. Also, a zoning permit, electrical permit, and a heating-cooling permit may be required to build a sunroom.

Permit rules and building codes vary depending on your location and take around one month to process. Licensed contractors should always pull the permits for you, which makes them liable for any on-site injuries and damages. After construction, an inspection verifies everything is up to building code standards.

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Converting a deck, porch, or patio into a sunroom costs $4,000 to $70,000, depending on the size and if it's going to be a 3 or 4-season room. A 3-season sunroom, also called a patio enclosure or screened-in porch, is the cheapest, while a 4-season room costs the same as a home addition.

Converting a deck into a 3-season sunroom or patio enclosure costs $8,000 to $30,000. Leveling and reinforcing the surface are required to meet building code requirements. Pouring a new concrete patio costs $4 to $12 per square foot, while building a new deck costs $15 to $30 per square foot.

Converting a 3-season room into a 4-season costs $3,000 to $20,000, which may include new windows, insulation, HVAC extension, and pouring a concrete foundation. Converting a 3-season room into a regular room or living space addition costs $20,000 to $80,000 or from $100 to $300 per square foot.

A 3-season sunroom to living space area requires removing the old sunroom and building a new 4-season room that's integrated into the existing construction, roofline, and exterior of the home. In some cases, finishing a basement costs around the same, but provides a better ROI in terms of square footage.

Converting a screened porch into a sunroom costs $4,000 to $20,000 or between $200 and $400 per linear foot. This conversion costs 30% more than converting the area to an enclosed patio. Additional costs apply for pouring a slab foundation and bringing the sunroom up to building code standards.

*Extra costs may apply for permits, insulation, and extending the HVAC system.

Merely replacing the screens with glass picture windows costs $400 to $800 per window, which includes a stronger frame with more insulation. If the current window frames are in good shape, installing new window panes cost $150 to $400 each, depending on if they are single or double-pane.

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Prefabricated sunroom additions cost $10,000 to $50,000 on average, depending on the size, brand, design, materials, customizations, and if it's a 3-season or 4-season model. Sunroom delivery, foundation, and labor costs $2,500 to $5,000. Low-end brands cost $20 to $60 per square foot, without installation.

Prefab sunrooms are built in a factory and then shipped to your home for assembly. After acquiring building permits, prefab sunrooms can be installed on top of a patio slab and sometimes on a wooden deck.

Some prefab sunroom kits are suitable for DIY assembly, but most require hiring a professional to keep the warranty in place and to pass local inspections.

Champion Sunrooms cost $25,000 to $45,000 or between $160 and $260 per square foot on average for their custom 4-season style rooms. Champion 3-season patio rooms cost $15,000 and up, depending on the design choices. Champion has a limited lifetime warranty on parts, materials, and labor.

Champion Sunrooms has showrooms in 50 cities, offers in-house financing, and employs an in-house crew for installation. Champion is Energy Star and AAMA certified with various models and customizations.

Their models come with either sloped gable roofing or flat studio roofs with various options for doors, windows, flooring, and lighting. Their tempered glass is a dual-pane Low-E coated that shields you from 95 percent of the suns harmful UV rays.

California Sunrooms cost $5,000 to $20,000, not including assembly or installation. They work in partnership with TEMO sunrooms, Sunesta awnings, and local Home Depot stores. This company offers in-house installation services plus a lifetime warranty.

Their models come with aluminum frames in 5 colors and three main window styles. Choose from a solarium style, or cathedral or flat-roof type sunrooms. For qualifying customers, they offer a 100% financing option with no money down.

SunSuites Sunrooms cost $40,000+ for 4-seasons sunrooms with low-maintenance fiberglass frames that are stronger than vinyl or wooden frames. Their models come with integrated power outlets, dual-pane glass windows, and a lifetime limited warranty. SunSuites Sunrooms are easy to customize to match your current home.

Florian Sunrooms start at $16,950 for a 10' x 13' model and up to $30,000+ for larger sizes and more features, not including installation. Florian offers upper-class sunroom kits, solariums, conservatories, and greenhouses. They are based in South Carolina but ship nationwide for extra fees.

Florian has more than 300 curved and straight-eave modelseither a lean-to or freestandingwith nearly unlimited sizes and configurations.

Florian is Energy Star compliant offering tempered, heat-repellent PPG glass that saves 58% on heating costs and blocks out 56% more heat than regular glass. Their Sunclean glass is water-repelling and self-cleaning. Warranties may not cover damage to the glass but inlcude the frames.

Brady Built Sunrooms cost $12,000 to $30,000, including assembly installation, depending on the style, design, and customizations. Brady Built offers vinyl or wood frames that come with a 25-year warranty.

Their sunrooms feature dual-pane Pella windows that are Low-E coated, tempered, and sealed to create highly energy-efficient glass. The structural designs offered are:

Sunspace sunrooms cost $10,000 for basic 3-season screen rooms or porch conversions, up to $50,000 or more for foam insulated 4-season models. Their glass frames come in 6 colors, and glass choices are clear or tinted in 5 different designs.

Sunspace offers a lifetime warranty on laminations, finishes, glass breakage, and hardware. Get a 10-year warranty on vinyl glazed windows and a 15-year warranty on insulating glass.

Patriot Sunrooms cost $10,000 to $35,000 on average, with styles including straight-eave, curved, cathedral, and conservatory. Patriot offers free design consultations, affordable financing, and transferable labor and material warranties. Plus, only experienced Patriot employees install their sunrooms.

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The many benefits of a sunroom often outweigh the disadvantages.

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A sunroom is affordable, has a 50% return on investment, provides natural sunlight, and is relaxing. Investing in a sunroom helps sell your home quicker, especially in New England or the Midwest. Plus, building a sunroom is cheaper and faster than a traditional stick-built home addition.

The most popular sunroom sizes are 12' x 12' and 16' x 24'. Custom sizes can be constructed to fit any concrete slab, deck, or porch. In colder climates, its important to place your new sunroom on the Southern side of your home to catch the most sunlight in winter.

A two-story sunroom addition costs $30,000 to $150,000 or between $100 and $300 per square foot to build. A two-story sunroom is priced similarly to a full home addition and requires a stronger foundation with higher-quality building materials than basic sunrooms.

A 4-season sunroom increases your property taxes by adding square footage to your home, which raises the property value. Many screen rooms or 3-season sunrooms are not considered living space, but instead, a non-habitable backyard patio, which increases your taxes less.

Three-season rooms have a 47% to 55% return on investment. Most three-season rooms are appraised as low as 25% of living space value on a per-square-foot basis. Four season sunrooms with a concrete slab and proper permits that converts to livable space, is valued at the home's normal $/sqft.

White, pale, and neutral colors are ideal for sunrooms to keep things bright, airy, and calming. These shades embrace the natural light coming from the outside and reflect more heat to keep the sunroom cooler in the summer.

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DIY sunroom kits cost $1,500 to $5,000 on average, depending on the type, size, and materials. Shipping costs up to $500, depending on the distance and weight. DIY sunroom and solarium kits are cheap, but limited in design and options. Most kits are 3-season with a 5-year warranty and include:

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2022 Sunroom Costs | 3 & 4-Season Room Addition Prices