How much does a sunroom cost?
How much does a sunroom cost?
$100 – $350 cost per square foot to build
$8,000 – $50,000 3-season room cost
$20,000 – $80,000 4-season sunroom cost
Average 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 a personal estimate or view the average sunroom sizes and prices below.
| 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 – $124,000 |
An 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'.
Sunroom addition cost per square foot
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.
| Type | Cost Per Square Foot |
|---|---|
| Prefab sunroom kit | $20 – $150 |
| Custom 3-Season room | $80 – $230 |
| Custom 4-Season room | $200 – $400 |
Cost to build a sunroom by type
The costs to build a sunroom depend on the size, type, quality, finishes, and if it's custom-built or prefabricated.
| 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. |
Four-season room cost
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.
| Type | Average Cost |
|---|---|
| Standard | $20,000 – $80,000 |
| Solarium / Conservatory | $50,000 – $150,000 |
Three-season room cost
A 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.
| 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 |
Solarium cost
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. Building a solarium addition costs $300 and $800 per square foot. A solarium has glass walls and roofing.
| Type | Average Cost |
|---|---|
| 3-Season | $30,000 – $60,000 |
| 4-Season | $50,000 – $100,000 |
Conservatory addition cost
A 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.
| Type | Cost Per Square Foot |
|---|---|
| Average | $200 – $600 |
| High-end | $600 – $1,200 |
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.
Greenhouse & garden room cost
A 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.
| 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+ |
Glass-atrium sunroom addition cost
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 and HVAC work. Contractors must review the blueprints and site with an engineer to provide an accurate quote.
Sunroom addition cost calculator
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%.
| 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 – $12,500 |
Sunroom construction costs
Labor includes foundation work, parts assembly, insulation, electricity, HVAC, and finishing work to meet building codes.
| 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 – $500 |
Planning & 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.
Sunroom foundation cost
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.
| 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 – $30 |
An existing base may require reinforcing to support the sunroom's added weight.
Sunroom frame material
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 estimates
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.
Sunroom roof cost
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.
| 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
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.
| 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 – $1,000 |
Sunroom doors prices
Installing 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:
| Type | Average Cost |
|---|---|
| Single-Entry | $380 – $1,800 |
| Sliding Glass | $700 – $2,400 |
| French | $700 – $1,800 |
| Bi-Fold | $3,000 – $12,000 |
Sunroom lighting and electrical costs
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. Other potential costs include:
| Addition | Average Cost |
|---|---|
| Install Light Fixture | $135 – $415 |
| Install Outlet | $120 – $275 |
| Install Ceiling Fan Costs | $150 – $350 |
| Install Electrical Switch | $150 – $250 |
| Upgrade Electrical Panel Costs | $850 – $1,700 |
| Electrical Wiring Installation Costs | $6 – $10 per linear foot |
Good to know: Most 3-season sunrooms don’t have electrical connections, but some prefabricated units come with built-in electrical components.
Sunroom heating & air conditioning costs (HVAC)
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.
| 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 – $6,000 |
Sunroom interior finishing costs
After 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.
| Finishing | Cost Per Square Foot |
|---|---|
| Painting Costs | $2 – $4 |
| Interior Designer Costs | $5 – $12 |
| Flooring Installation Costs | $2 – $15 |
| Radiant Floor Heating Costs | $6 – $15 |
| Blinds Cost | $3 – $7 |
| Plantation Shutters Cost | $20 – $45 |
Cost to convert a deck, porch, or patio to a sunroom
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.
| 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 – $20,000 |
Convert deck or patio into sunroom cost
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.Â
Building a new deck costs $25 to $50 per square foot.
Cost to convert 3-season room to 4-season
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.
Alternatively, finishing a basement costs around the same.
Converting screened porch to sunroom cost
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.
| 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.
Prefab sunroom kit prices
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.
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.
Low-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.
Sunroom kit prices by brand
| Brand | Average Cost |
|---|---|
| Champion Sunrooms | $15,000 – $45,000 |
| California Sunrooms | $5,000 – $20,000 |
| Florian Sunrooms | $16,950 – $30,000 |
| Brady Built Sunrooms | $12,000 – $20,000 |
| Sunspace Sunrooms | $10,000 – $50,000 |
| Patriot Sunrooms | $10,000 – $35,000 |
| SunSuites Sunrooms | $40,000+ |
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
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.
Patriot sunrooms cost
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.
Pros & cons of sunrooms
The many benefits of a sunroom often outweigh the disadvantages:
Benefits of a sunroom
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
Disadvantages of sunrooms
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
Sunroom FAQs
Does a sunroom add value to your home?
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.
How much does a two-story sunroom cost?
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.
Does adding a sunroom increase taxes?
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.
How long does it take to build a sunroom?
A prefab sunroom kit takes 1 to 2 weeks to build. A custom-built sunroom takes 2 months or more to build.
| 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.
Can I build a sunroom DIY?
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.
How to build a sunroom on a budget
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.
Hiring a sunroom contractor
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.
Questions to ask
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?