How Much Does It Cost to Enclose a Deck?
Enclosing a deck costs anywhere from $600 for a basic screen enclosure to $80,000 or more for a fully insulated four-season room. The average homeowner spends between $8,000 and $25,000 for a mid-range three-season enclosure.
The total cost depends on the type of enclosure, the size of the deck, the materials used, whether you hire a contractor, and any additional extras you choose to add. This guide breaks down the cost of each enclosure type, the factors that affect pricing, and what to budget for permits and add-ons.
Table of Contents
Cost Summary by Enclosure Type
| Enclosure Type | Material Cost | Total with Labor | DIY Possible? | Permit Needed? |
|---|---|---|---|---|
| Screen enclosure (basic) | $300 to $1,500 | $600 to $3,500 | Yes | Usually no |
| Screen enclosure (upgraded frame) | $1,500 to $5,000 | $3,000 to $8,000 | Yes (with experience) | Sometimes |
| Three season room | $5,000 to $30,000 | $10,000 to $40,000 | No (professional recommended) | Yes |
| Four season room | $15,000 to $50,000 | $25,000 to $80,000 | No (professional required) | Yes |
| Greenhouse / Solarium kit | $2,500 to $10,000 | $5,000 to $20,000 | Possible (kit dependent) | Usually yes |
Prices are approximate 2025 U.S. averages. Actual costs vary by region, deck size, materials, and contractor rates.
5 Enclosure Types Explained
Basic Screen Enclosure ($600 to $3,500)
This is the most affordable option. Mesh screens are attached to posts around the deck perimeter. The screens block insects while allowing full airflow. If your deck already has a roof, this project can be completed in a weekend.
- What is included: Screen mesh, support posts or frames, screen door, basic hardware.
- What is not included: A roof (your deck must already have one, or you need to add one separately). No windows, no insulation, no climate control.
- Best for: Homeowners who want bug protection and airflow without a major investment. Three-season use in mild climates.
Upgraded Screen Enclosure ($3,000 to $8,000)
A step up from basic screens. This type uses a permanent aluminum or wood frame with higher-quality screen panels. It looks more finished and lasts longer than a basic mesh installation.
- What is included: Structural frame (aluminum or pressure-treated wood), screen panels, screen door, and kick plates at the base to protect screens from foot traffic and pets.
- Best for: Homeowners who want a more polished look and longer lasting screen system.
Three Season Room ($10,000 to $40,000)
A three-season room encloses the deck with windows that can be opened in warm weather and closed in cool weather. It extends the usable season from spring through fall but is not insulated for winter use.
- What is included: Window panels (single pane), structural framing, a solid or partially glass roof, and flooring upgrades if needed.
- Key cost driver: Windows are the most expensive component. Individual windows range from $150 to $1,000 each, depending on size and type. A typical enclosure needs 6 to 12 windows.
- Best for: Homeowners who want a versatile space that works for 8 to 10 months per year.
Four Season Room ($25,000 to $80,000)
A four-season room is a fully enclosed, insulated, and climate-controlled extension of your home. It is usable year-round, including the coldest winter months. This is the most expensive option but adds the most living space and home value.
- What is included: Double-pane insulated windows, insulated walls and ceiling, HVAC connection or dedicated heating and cooling, electrical wiring, proper flooring, and often upgraded lighting.
- Key cost drivers: Insulation ($0.30 to $2.00 per square foot for the material), double-pane windows ($300 to $1,500 each), HVAC connection ($1,500 to $5,000), and electrical work ($2,000 to $6,000).
- Best for: Homeowners who want a true additional room that functions in all weather. This type adds the most resale value.
Greenhouse or Solarium ($5,000 to $20,000)
A greenhouse enclosure uses glass or polycarbonate panels for maximum natural light. It acts like a sunroom that can also support indoor plant growing. Prefabricated solarium kits are available for $2,500 to $10,000 for materials, with professional installation adding $2,500 to $10,000 more.
Best for: Plant enthusiasts, homeowners who want maximum natural light, and those interested in year-round gardening.
Factors That Affect the Total Cost
Deck Size
Larger decks cost more to enclose. A 100 square foot screen enclosure might cost $1,500. The same type of enclosure for a 300 square foot deck could cost $4,000 or more. Most contractors price enclosures by the square foot or linear foot of wall perimeter.
Existing Structure
If your deck already has a solid roof and structural posts, the enclosure cost drops significantly because the most expensive structural elements are already in place. If the deck has no roof, adding one can cost $3,000 to $10,000, depending on size and materials. This is often the single largest added expense.
Materials
Material choice affects both cost and lifespan. Pressure-treated wood framing is the most affordable. Aluminum framing costs more but requires no maintenance. For the deck floor itself, composite decking is ideal for enclosed spaces because it does not rot from trapped humidity, does not need sealing, and requires no painting, even in a semi-enclosed environment where moisture can linger.
EVODEK composite deck board is well-suited for enclosed deck floors. The capped coextrusion surface blocks moisture penetration, which is especially important in enclosed spaces where airflow is reduced. Request free samples to evaluate the material before your project.
DIY vs Professional Installation
| Project Type | DIY Savings | Professional Recommended? |
|---|---|---|
| Basic screen enclosure | 30% to 50% | Optional |
| Upgraded screen enclosure | 20% to 40% | Recommended |
| Three season room | Not recommended | Yes |
| Four season room | Not feasible | Required |
| Greenhouse kit | 20% to 40% | Optional |
Labor typically accounts for 30% to 40% of the total project cost. For screen enclosures, DIY is realistic with basic tools. For three-season and four-season rooms, structural framing, window installation, and electrical work should be done by licensed professionals.
Permits and Building Codes
Most deck enclosure projects require a building permit. Here is what to expect.
- Screen enclosures without structural changes (no new roof, no wall framing) often do not need a permit. Check with your local building department.
- Three-season and four-season rooms almost always require a permit because they add enclosed square footage to the home. Expect permit fees of $100 to $500.
- Electrical and HVAC work requires separate permits in most jurisdictions. An electrician or HVAC contractor typically handles the permit process as part of their scope.
Important: An enclosed deck that adds heated square footage may increase your property tax assessment. Check with your local tax assessor’s office before beginning a four-season room project.
Popular Add-On Costs
These optional upgrades increase functionality but also increase the budget.
| Add On | Typical Cost |
|---|---|
| Ceiling fan | $150 to $500 (installed) |
| Electrical outlets and lighting | $2,000 to $6,000 |
| Fireplace (gas or electric) | $2,000 to $5,000 |
| Outdoor kitchen or grill station | $500 to $10,000 |
| HVAC connection | $1,500 to $5,000 |
| Deck railing or half wall | $1,500 to $4,000 |
| Screen panels between posts | $500 to $2,000 |
Conclusion
Yes. Industry estimates suggest enclosed decks return 50% to 75% of their construction cost at resale. Four-season rooms tend to return the most because buyers view them as additional heated living space. Screen enclosures return less in dollar terms but are inexpensive to build, so the percentage return can still be strong.
The exact return depends on your local real estate market, the quality of construction, and how well the enclosure matches the style of the home.
FAQ
How much does it cost to screen in an existing deck?
A basic screen enclosure on a deck that already has a roof costs $600 to $3,500. An upgraded screen system with an aluminum frame costs $3,000 to $8,000. If the deck does not have a roof, adding one adds $3,000 to $10,000 to the total.
Is it cheaper to enclose a deck or build a sunroom from scratch?
Enclosing an existing deck is almost always cheaper because the floor structure already exists. Building a sunroom from scratch typically costs $20,000 to $80,000 because it includes foundation work, floor framing, and all structural elements. Enclosing an existing deck can save 30% to 50% compared to a new build.
Do I need a permit to enclose my deck?
For basic screen enclosures with no structural changes, a permit is often not required. For three season rooms, four season rooms, and any project involving electrical or HVAC work, a permit is almost always required. Permit fees typically range from $100 to $500. Check with your local building department before starting.
Can I enclose a deck myself?
Basic screen enclosures are manageable DIY projects for homeowners with basic tools. Upgraded screen systems with permanent frames are doable with moderate experience. Three season and four season rooms require professional framing, window installation, and potentially licensed electrical and HVAC work. For these projects, hiring professionals is strongly recommended.
What is the best flooring for an enclosed deck?
Composite decking is an excellent choice for enclosed deck floors. It resists moisture even in reduced airflow conditions, never needs staining or sealing, and cleans easily. For four season rooms, tile or luxury vinyl plank are also popular because they handle temperature controlled environments well.
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