Written by
Sarah Noel
November 28,
Fact-checked by
Tom Grupa
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 a personal estimate or view the average sunroom sizes and prices below.
Sunroom Cost Size 3-Season 4-Season 8x10 $6,500 &#; $18,500 $16,000 &#; $28,000 10x10 $8,000 &#; $23,000 $20,000 &#; $35,000 10x12 $9,500 &#; $27,500 $24,000 &#; $42,000 10x16 $12,500 &#; $37,000 $32,000 &#; $56,000 10x20 $16,000 &#; $46,000 $40,000 &#; $66,000 12x12 $11,500 &#; $33,000 $28,500 &#; $47,500 12x16 $15,500 &#; $45,000 $38,500 &#; $63,500 12x20 $19,000 &#; $55,000 $48,000 &#; $79,000 14x14 $15,500 &#; $45,000 $39,000 &#; $65,000 16x16 $20,000 &#; $60,000 $50,000 &#; $80,000 16x24 $30,000 &#; $85,000 $75,000 &#; $120,000 20x20 $32,000 &#; $90,000 $80,000 &#; $124,000An all-season or 4-season room integrates into the existing construction of the home with insulation, electricity, and an HVAC system.
Three-season sunrooms are additions enclosed with glass but lacking insulation and HVAC systems.
A sunroom adds extra living space, increases a home's appraisal value, adds curb appeal, and yields a 50%+ return on investment.
The most popular sunroom sizes are 12'x12' and 16'x24'.
Get free estimates from sunroom contractors near you.
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A sunroom addition costs $100 to $350 per square foot installed on average. The cost to add a 3-season room is $80 to $230 per square foot, and a custom-built 4-season sunroom runs $200 to $400 per square foot.
Sunroom cost per square foot - chartSunroom cost per square foot Type Cost Per Square Foot Prefab sunroom kit $20 &#; $150 Custom 3-Season room $80 &#; $230 Custom 4-Season room $200 &#; $400The costs to build a sunroom depend on the size, type, quality, finishes, and if it's custom-built or prefabricated.
Cost to build a sunroom by type Type Average Cost Description Prefab Sunroom Kits $1,500 &#; $8,000 Prefab kits are premade, delivered, and assembled on an existing deck or patio. Greenhouse / Garden Room $3,000 &#; $25,000 Typically prefab kits with glass or plastic panels. Lack a foundation and insulation. Enclosed Patio / Screened-in Porch $8,000 &#; $30,000 Built on top of an existing deck or patio. Typically no insulation, HVAC, or electrical. Prefabricated Sunroom $5,000 &#; $50,000 High-end prefab sunroom from name-brand dealers. Higher quality materials, insulated panels, customizations. 3 or 4-season models. 3-Season Room $15,000 &#; $50,000 Custom built on a foundation. Insulated and sealed, but typically lacks HVAC and electricity. Lights and HVAC can be installed separately. 4-Season Room $20,000 &#; $80,000 Custom built on a foundation with insulation, electricity, HVAC, and glass windows. Provides an extension of living area. Solarium / Conservatory $30,000 &#; $150,000 Custom-built glass solarium or conservatory is a high-end 4-season room with all glass walls and glass ceiling.Get free estimates from sunroom contractors.
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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, and foundation. A four-season room is temperature-controlled with insulation and connects to the rest of the house.
Four-season room cost - chart4-Season Room Cost Type Average Cost Standard $20,000 &#; $80,000 Solarium / Conservatory $50,000 &#; $150,000 4-season room living space blended with french patio doorsA 3-season room costs $8,000 to $50,000 on average, depending on the size, finishing options, and foundation. Building a three-season room addition costs $80 to $230 per square foot. Three-season sunrooms typically lack insulation, heating, cooling, and electricity.
Three-season room cost - chart3-Season Room Cost Type Average Cost Prefab Kits $1,500 &#; $8,000 Pool Enclosure $4,000 &#; $50,000 Patio Enclosure $8,000 &#; $30,000 Custom Site-built $15,000 &#; $50,000 Three-season room installed with electricityA solarium costs $30,000 to $100,000 on average, depending on the size and whether it's a 3-season or 4-season extension. Building a solarium addition costs $300 and $800 per square foot. A solarium has glass walls and roofing.
Solarium cost - chartSolarium Cost Type Average Cost 3-Season $30,000 &#; $60,000 4-Season $50,000 &#; $100,000 High-end solarium addition with glass roof and wallsA home conservatory addition costs $50,000 to $150,000 total or $200 and $600 per square foot installed. High-end residential or commercial conservatories cost $600 to $1,200 per square foot to build.
Conservatory Addition Cost Type Cost Per Square Foot Average $200 &#; $600 High-end $600 &#; $1,200A 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.
Large house conservatory built with hinged windows and glass roofA greenhouse or garden-room addition costs $2,000 to $30,000 on average. Prefab garden room kits cost $10 to $25 per square foot and are available with glass or plastic panels. Greenhouses traditionally lack a foundation and insulation.
Garden Room Addition Cost Type Average Cost Small Prefab Kit $600 &#; $3,000 Mid-size Freestanding / Lean-to $3,000 &#; $12,000 Greenhouse w/ Glass Panels $10,000 &#; $25,000 Custom Built $30,000+ Greenhouse and garden room addition connected to homeAn 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 and HVAC work. Contractors must review the blueprints and site with an engineer to provide an accurate quote.
Four-season sunroom with glass atrium roofGet free estimates from sunroom companies near you.
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Sunroom costs increase as more features are added. States like New York, New Jersey, Massachusetts, Florida, or California have higher costs of living that raise sunroom prices by up to 50%.
Sunroom Addition Cost Breakdown Type Materials Labor Total Cost Three-Season Room $5,000 &#; $35,000 $3,000 &#; $15,000 $8,000 &#; $50,000 Four-Season Room $15,000 &#; $60,000 $10,000 &#; $20,000 $25,000 &#; $80,000 Glass Solarium $20,000 &#; $70,000 $10,000 &#; $30,000 $30,000 &#; $100,000 Conservatory $35,000 &#; $100,000 $15,000 &#; $50,000 $50,000 &#; $150,000 Greenhouse / Garden Room $2,500 &#; $10,000 $500 &#; $2,500 $3,000 &#; $12,500Labor includes foundation work, parts assembly, insulation, electricity, HVAC, and finishing work to meet building codes.
Sunroom Construction Costs Item Average Cost Foundation $1,000 &#; $6,000 Insulation $300 &#; $1,500 Roof $500 &#; $7,000 Windows $3,500 &#; $12,000 Doors $700 &#; $2,400 Electricity $250 &#; $600 HVAC $300 &#; $5,000 Interior Finishing $500 &#; $5,000 Site Cleanup $300 &#; $700 Permits $200 &#; $500Planning & design &#; Hiring an architect costs 5% to 20% of the total construction cost to design the structure.
Site preparation &#; Additional costs apply when building a new foundation such as land clearing, tree removal, excavation, and landscaping.
Site cleanup &#; Construction-site cleaning costs $300 to $700 on average.
Permits &#; A building permit for a sunroom costs $200 to $500 and are required. Also, a zoning permit, electrical permit, and a heating-cooling permit may be required.
A sunroom foundation costs $1,000 to $6,000 or $5 to $15 per square foot on average. Site-built sunrooms require a proper building foundation, while prefab sunroom kits can attach to an existing wooden deck or patio with a level surface.
Sunroom Foundation Cost Type Cost Per Square Foot Concrete Slab Costs $5 &#; $10 Pier and Beam $7 &#; $11 Crawl Space $7 &#; $14 Paver Patio Costs $10 &#; $17 New Deck Costs $15 &#; $30An existing base may require reinforcing to support the sunroom's added weight.
Sunroom framing is typically aluminum, vinyl, wood, or resin plastic. Three-season sunrooms have 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 $4 per square foot. Other insulation options are curtains, insulated panels, dual-pane windows, sub-deck protection, and sealing joints. A screen room or three-season sunroom doesn&#;t require insulation.
A sunroom roof costs $500 to $7,000, depending on the material. 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. Adding a skylight costs $1,600 to $4,200 each.
Sunroom Roof Cost Type Average Cost Asphalt $500 &#; $1,000 Metal $1,200 &#; $2,400 Slate / Clay $2,200 &#; $4,500 Glass $3,000 &#; $7,000 Skylights $300 &#; $3,000*Based on the average sunroom size of 150 to 300 square feet.
Sunroom windows cost $3,500 to $12,000 on average for 10 new or replacement windows. 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, plastic windows, or screens.
Sunroom Windows Cost Type Average Cost Per Window Single-Pane $290 &#; $460 Double-Pane $450 &#; $1,000 Triple-Pane $600 &#; $1,300 Casement / Awning $200 &#; $1,500 Sliding $250 &#; $1,000 Bay / Bow $1,500 &#; $5,000 Fixed / Picture $180 &#; $1,000Installing French or sliding glass doors costs $700 to $2,400 and can replace walls, provide natural light, and provide stunning outside views. Other options include patio doors, single-entry, telescoping, or bi-fold doors:
Sunroom Doors Cost Type Average Cost Single-Entry $380 &#; $1,800 Sliding Glass $700 &#; $2,400 French $700 &#; $1,800 Bi-Fold $3,000 &#; $12,000Hiring 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. Other potential costs include:
Good to know: Most 3-season sunrooms don&#;t have electrical connections, but some prefabricated units come with built-in electrical components.
Adding or expanding the HVAC system costs $300 to $5,000 to bring heating and cooling into the sunroom. Installing a mini-split AC unit costs $2,000 to $6,000, which provides both heating and cooling without ducts.
Sunroom Heating & Air Conditioning Costs Type Average Cost Extend Existing Ductwork $10 &#; $20 per linear foot Window AC Unit $250 &#; $700 Space Heater $50 &#; $300 Baseboard Heaters $300 &#; $800 Ductless Mini-Split System $2,000 &#; $6,000After building the sunroom, extra costs of $4 to $50 per square foot apply for painting, flooring, shutters or blinds, interior design and decor, and other interior finishes.
Get free estimates from sunroom contractors near you.
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Get free estimates from sunroom contractors.
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Converting a deck, porch, or patio into a sunroom costs $4,000 to $70,000, depending on the size and features. A 3-season sunroom, also called a "patio enclosure" or screened-in porch, is cheapest. A 4-season sunroom costs the same as a home addition.
Cost to convert to sunroom - chartCost To Convert Deck, Porch, or Patio to Sunroom Conversion Average Cost Deck or Patio into Sunroom $8,000 &#; $30,000 3-Season Room To 4-Season $3,000 &#; $20,000 3-Season Room To Living Space $20,000 &#; $80,000 Screened Porch To Sunroom $4,000 &#; $20,000Converting 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.
Building a new deck costs $25 to $50 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 $100 to $300 per square foot.
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Alternatively, finishing a basement costs around the same.
Converting a screened porch into a sunroom costs $4,000 to $20,000 or $200 and $400 per linear foot. Additional costs apply for pouring a slab foundation and bringing the sunroom up to building code standards.
Converting Screened Porch To Sunroom Cost Type Average Cost Convert To 3-Season $4,000 &#; $10,000 Convert To 4-Season $10,000 &#; $20,000*Extra costs may apply for permits, insulation, and extending the HVAC system.
Replacing the screens with glass picture windows costs $400 to $800 per window, which includes a stronger frame with more insulation.
Installing new window panes costs $150 to $400 each if the current window frames are in good shape.
Prefabricated sunroom kits cost $20 to $150 per square foot on average or $10,000 to $50,000 installed, depending on the size, brand, model, and if it's a 3-season or 4-season room. Sunroom delivery, foundation, and labor costs $2,500 to $5,000 alone.
Average prefab sunroom kit prices - chartPrefab 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.
All glass prefab sunroom kit installedLow-end DIY sunroom kits cost $1,500 to $5,000 on average. Shipping costs up to $500. Most DIY sunroom kits are 3-season with a 5-year warranty. Installing a DIY sunroom takes two people 1 to 2 days. You'll also need a level surface or a deck prepared beforehand.
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.
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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.
The many benefits of a sunroom often outweigh the disadvantages:
Adds extra living space for relaxation, entertainment, or exercise
Provides natural sunlight and open views to the outside year-round
Costs less than a traditional home addition and constructs faster
Increases your home's appraisal value and has a 50%+ return on investment
Increases your home&#;s curb appeal to sell faster
Brings natural light and free heating into your home
Serves as an indoor garden to grow plants
Increased property taxes due to the added square footage
Possible increase in home&#;s insurance rates
Increased energy bills for heating and cooling 4-season rooms
Less privacy due to the surrounding glass walls
Unusable during the winter when unheated
Sunrooms 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 livable space are valued at the home's normal $/sqft.
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 considered a non-habitable backyard patio with lower tax rates.
A prefab sunroom kit takes 1 to 2 weeks to build. A custom-built sunroom takes 2 months or more to build.
Prefab vs. Custom Sunroom Installation Cost Type Installation Time Average Cost Prefabricated 1 to 2 weeks $5,000 &#; $50,000 Custom-Built 2 months or more $30,000 &#; $90,000*Additional costs may apply for shipping, assembly, and site-work.
Sunrooms are not an easy DIY project. Before buying a prefabricated kit, get free estimates from sunroom contractors to compare.
Contractor-built sunrooms last longer and require fewer repairs over time.
Contractors offer a bigger selection of models and higher-quality materials.
Only contractors build four-season sunrooms with electrical and plumbing.
Contractors provide a warranty on labor.
Contractors take care of permits and property inspections.
Here's how to save money when planning your sunroom budget:
Select a 3-season sunroom model without insulation, heating or cooling.
Keep the overall size small.
Add a portable electric heater or fireplace in colder weather.
Spend extra on insulation to save money through energy-efficiency.
Place the sunroom on the Southern side of your home to catch the most sunlight in winter.
Before hiring a home addition contractor near you, be sure to:
Get at least three in-person estimates.
Visit local showrooms to compare models and sizes.
Do the research and determine what kind of flooring, windows, roofing, and paint.
Ask for recommendations from family, friends, and neighbors.
Read reviews and check out their previous work on HomeGuide and Google.
Ask for a full itemized contract in writing in case of a dispute.
Make sure your sunroom comes with a service and manufacturer&#;s warranty for at least several years.
Avoid making large payments upfront.
How long have you been in business?
Can I see a portfolio of your past sunroom projects?
Are you licensed, insured, and bonded?
Are you a member of local or national home builders associations?
Do you use materials approved by the AAMA, IGCC, or NSA?
What permits do I need, and will you obtain them?
How do you handle damages that happen on the job?
What happens if I'm not satisfied with the work?
Is cleanup included in your quote?
Who's the project manager, and will you use subcontractors?
What hours do you and your crew work?
What warranties and guarantees are included?
What&#;s your payment schedule?
Sunrooms can be a great option in adding a room to your home. A sunroom can give you the beauty of the outdoors and will keep you bug free and so much more. It is a great way to enjoy the sunshine while not being bothered by the elements, bugs and other outdoor problems. Yet sometimes the average cost of a sunroom can be daunting.
There are options for people who want a sunroom, but have a tighter budget. Below is a summary of average sunroom costs and what to look for.
There are many types of Sunrooms from a simple, prefabricated, to a fully insulated addition called a four-season room. The main types of sunrooms are three-season and four-season sunrooms. A three-season sunroom is an attached structure with access to your home, but without insulation. This type of sunrooms average cost is $10,000 and $40,000.
Now a four-season sunroom is a sunroom addition that includes plumbing, HVAC and electricity. A four season sunroom the average sunroom cost can be between $24,000 and $80,000.
Most sunroom contractors will give you a price that&#;s based on the square footage of the sunroom you&#;re going to install. This price will likely include labor and materials, but it&#;s a good idea to know what&#;s included before getting started.
The average sunroom cost per square foot is around $85 to $240 for a three-season sunroom, and upwards of $200 to $400 for a four-season sunroom. Below will give you an idea of sunroom prices by square footage.
There are several different types of sunrooms to add to your home. Here are some with a breakdown of the average sunroom&#;s price.
An all glass room thats fixed to your home is called a solarium. It is not insulated or climate controlled, but looks amazing and plants thrive in its environment. The average sunroom cost for a solarium can be from about $30,000 to $76,000.
A three-season sunroom is one of the best places to be in except for the winter. They usually dont have insulation, climate control or electricity. The price of this type of sunroom is cheaper than a four season and is a popular choice. A three-season sunroom, without no heating or cooling, run between $9,000 and $39,000.
Out of all of the sunroom types a 4 season sunroom is the most like having a full addition to your home. A four-season room is insulated, has electricity and is climate controlled so you can use it year round. A four-season sunroom average cost is between $26,000 and $80,000.
A conservatory is much like a solarium, it&#;s an all-glass enclosure, yet these rooms will be temperature-controlled and have electricity. The average cost of a conservatory Sunroom will be around $50,000 to $148,000.
The installation cost of a sunroom usually is about one-half to one-third of the material costs. But, that can go up fast if you decide to have HVAC costs, roofing or electrical work costs. That is the reason sunroom installation cost is higher in comparison to that of a three-season room, where no HVAC or roofing work is needed.
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