What is the difference between a three-season and four-season sunroom?

A three-season sunroom uses insulated glass and a solid roof but doesn't include HVAC — it's comfortable from about March through November in Atlanta. A four-season sunroom is fully insulated with heating and cooling, making it usable year-round. The four-season version costs more but counts as heated square footage on your home appraisal, which increases your property value.

How much does a sunroom cost?

Costs typically range from $25,000 to $120,000+ depending on the type (three-season vs. four-season), size, and finishes. A standard three-season sunroom starts around $25,000-$50,000. A four-season room with HVAC runs $40,000-$80,000. Larger or custom builds go higher. We provide free, detailed estimates.

Does a sunroom add value to a home?

Yes — especially a four-season sunroom. Because a four-season room with HVAC counts as heated and cooled square footage, it directly increases your home's appraised value. Sunrooms are consistently rated as a top-demand feature by real estate agents. Even a three-season room adds significant appeal to buyers.

Do I need a permit to build a sunroom?

Yes. Sunrooms are considered room additions and require building permits, structural plans, and inspections — especially four-season rooms that tie into HVAC and electrical. We handle all permitting, engineering, and inspections as part of our service.

Can you convert my screened porch into a sunroom?

In many cases, yes. If your screened porch has a solid roof and adequate structural framing, we can replace the screens with insulated glass windows, add insulation, and convert it into a three-season or four-season sunroom. We inspect your existing structure first to determine what modifications are needed. This approach is often more affordable than building a brand-new sunroom addition.

Sunroom Builder Atlanta, GA | Three-Season & Four-Season Rooms

Sunrooms Built for Georgia's Climate

A sunroom is a fully enclosed room with windows on multiple sides — unlike a screened porch, it's built with insulation and solid construction that lets you use it comfortably even when the temperature outside doesn't cooperate.

The big decision is three-season vs four-season. A three-season room uses insulated glass but no HVAC — comfortable March through November in Georgia. A four-season room adds full insulation and climate control, making it usable year-round and countable as heated square footage on your appraisal. The comparison section below covers the tradeoffs and costs in detail.

If you already have a covered porch, converting it into a sunroom is often more affordable than building new — the roof and structure are already in place.

Quick Facts

Typical Timeline: 3-6 weeks depending on scope
Room Types: Three-season and four-season options
Windows: Low-E insulated glass, single or double-hung
HVAC: Optional tie-in or mini-split systems
Permits: We handle all permits and inspections
Service Area: Atlanta metro — 10+ cities

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Three-Season vs. Four-Season Sunrooms

Both add livable space to your home — the right choice depends on how you want to use the room.

Three-Season Sunroom
A three-season sunroom uses insulated glass windows and a solid roof to create a comfortable enclosed space from early spring through late fall. These rooms are designed for ventilation — windows open to let breezes in, and close to keep rain, pollen, and bugs out. No HVAC required for comfortable use during Georgia's long warm season.
Advantages

Comfortable March through November in Atlanta
Insulated glass blocks rain, wind, and pollen
Windows open for fresh air flow
Lower cost than four-season construction
No HVAC system needed

Considerations

Not comfortable in Georgia's coldest winter weeks
Does not count as heated square footage on appraisals
Limited use December through February
Best For
Homeowners who want an enclosed outdoor room without the cost of full climate control

Price Range (Installed)
$25,000 – $50,000 (installed)
Four-Season Sunroom
A four-season sunroom is a fully insulated, climate-controlled room addition that performs like any other room in your house — 365 days a year. We tie into your existing HVAC system or install a dedicated mini-split unit, insulate the walls and roof to code, and install double-pane Low-E glass throughout. This is a true room addition.
Advantages

Comfortable year-round with heating and cooling
Counts as heated square footage (increases home value)
Full insulation meets Georgia energy code
Can include electrical, outlets, and lighting
Functions as an everyday living space

Considerations

Higher construction cost than three-season rooms
Longer build timeline (4-6 weeks typically)
HVAC costs add to the project budget
More complex permitting requirements
Best For
Homeowners who want a true room addition that adds square footage and year-round value

Price Range (Installed)
$40,000 – $80,000+ (installed)

A three-season sunroom uses insulated glass windows and a solid roof to create a comfortable enclosed space from early spring through late fall. These rooms are designed for ventilation — windows open to let breezes in, and close to keep rain, pollen, and bugs out. No HVAC required for comfortable use during Georgia's long warm season.

Advantages

Comfortable March through November in Atlanta
Insulated glass blocks rain, wind, and pollen
Windows open for fresh air flow
Lower cost than four-season construction
No HVAC system needed

Considerations

Not comfortable in Georgia's coldest winter weeks
Does not count as heated square footage on appraisals
Limited use December through February

Best For

Homeowners who want an enclosed outdoor room without the cost of full climate control

Price Range (Installed)

$25,000 – $50,000 (installed)

Sunroom Investment Guide

Typical sunroom costs. Every project is custom — we provide free, detailed estimates.

Three-Season Sunroom

12' x 16' (192 sq ft)

$25,000 – $50,000

Insulated glass windows
Solid roof with insulation
Concrete or tile flooring
Ceiling fan + basic electrical
Permits & inspections
Professional construction & cleanup

Four-Season Sunroom

14' x 18' (252 sq ft)

$40,000 – $80,000

Double-pane Low-E glass windows
Fully insulated walls, floor, and roof
HVAC tie-in or mini-split system
Full electrical — outlets, switches, lighting
Permits, engineering, & inspections
Complete finish work inside and out

Custom / Large Sunroom

300+ sq ft

$70,000 – $120,000+

Premium windows and finishes
Custom roof design (cathedral, shed, gable)
Heated flooring or premium tile
Dedicated HVAC zone
Integrated with outdoor kitchen or fireplace
Full design, engineering, & planning package

Get Your Custom Project Quote Financing options available

How We Work

From first call to final walkthrough, we make the process simple and stress-free.

01

Free Consultation

We visit your home, discuss your vision, assess the site, and understand your budget.

02

Custom Design

3D renderings, material selection, and permit planning tailored to your property.

03

Expert Build

Professional construction with daily progress updates. We handle permits and inspections.

04

Final Walkthrough

We inspect every detail together. Your project isn't done until you're thrilled.

05

Warranty & Support

We stand behind our work with a comprehensive warranty and ongoing support.

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What Our Customers Say

5.0 on Google

"Peachy Decks completely transformed our backyard. The composite deck they built is stunning and the craftsmanship is top-notch. They handled everything from permits to final cleanup."

Sarah M.

Marietta, GA

"We got quotes from four companies. Peachy Decks was the most transparent with pricing and the only one who showed up on time for the consultation. The finished pergola exceeded our expectations."

James & Linda R.

Roswell, GA

"Our screened porch is now our favorite room in the house. The team was professional, clean, and finished ahead of schedule. Highly recommend for anyone in the Atlanta area."

David K.

Alpharetta, GA

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Sunroom FAQs

Common questions about sunrooms. Don't see your question? Give us a call — we're happy to help.

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What is the difference between a three-season and four-season sunroom?

A three-season sunroom uses insulated glass and a solid roof but doesn't include HVAC — it's comfortable from about March through November in Atlanta. A four-season sunroom is fully insulated with heating and cooling, making it usable year-round. The four-season version costs more but counts as heated square footage on your home appraisal, which increases your property value.
How much does a sunroom cost?

Costs typically range from $25,000 to $120,000+ depending on the type (three-season vs. four-season), size, and finishes. A standard three-season sunroom starts around $25,000-$50,000. A four-season room with HVAC runs $40,000-$80,000. Larger or custom builds go higher. We provide free, detailed estimates.
Does a sunroom add value to a home?

Yes — especially a four-season sunroom. Because a four-season room with HVAC counts as heated and cooled square footage, it directly increases your home's appraised value. Sunrooms are consistently rated as a top-demand feature by real estate agents. Even a three-season room adds significant appeal to buyers.
Do I need a permit to build a sunroom?

Yes. Sunrooms are considered room additions and require building permits, structural plans, and inspections — especially four-season rooms that tie into HVAC and electrical. We handle all permitting, engineering, and inspections as part of our service.
Can you convert my screened porch into a sunroom?

In many cases, yes. If your screened porch has a solid roof and adequate structural framing, we can replace the screens with insulated glass windows, add insulation, and convert it into a three-season or four-season sunroom. We inspect your existing structure first to determine what modifications are needed. This approach is often more affordable than building a brand-new sunroom addition.

Three-Season & Four-Season Sunrooms in Atlanta