Normal Range: $22,000 - $72,600

Sunroom addition costs range from $22,000 to $72,600, with an average of $47,000 depending on size and materials.

If you’re considering a sunroom addition to enjoy the change of seasons or build out a perfect reading and relaxation area, a small sunroom could cost as little as $22,000 to build. And a large luxury sunroom could cost as much as $72,600. The cost depends on several factors, including the location of your home, the quality of materials, and the size of the sunroom you want to add on.

How Much Does a Sunroom Cost Per Square Foot?

On average, it costs between $150 and $300 per square foot to build a sunroom. With a wide variety of layouts and material types, these rooms offer floor-to-ceiling sun, flooding the room with natural light without going outside.

The price depends on several factors, including the type of sunroom you’re building. Generally, four-season sunroom and conservatory costs are on the higher end of the spectrum, while three-season sunrooms, glass solariums, and atriums are on the lower end. Most sunrooms range between 50 and 400 square feet. Prices will skew lower and higher depending on the existing structure and chosen finishes.

Sunroom Addition Cost by Type

·       Four-Season Room: A four-season room is an insulated room that can be used during all seasons.

·       Three-Season Room: A three-season room is a less-insulated version of a four-season room, so it will be colder in the winter and hotter in the summer.

·       Glass Solarium: This is a glass room that truly extends your outdoor space—not only are the walls glass, but the roof is, too.

·       Conservatory: A conservatory is an enclosed greenhouse, so you don’t have to worry about the weather.

·       Prefab Sunroom: Prefab sunrooms are structures manufactured in factories to easily attach to your home with minimal installation. Installation takes less time and costs less than building from scratch.

Cost to Hire a General Contractor to Build a Sunroom

A general contractor will be the best choice for a sunroom addition for a few reasons: they are familiar with all build aspects, they are only one person you need to deal with, and they finish products significantly faster than a group of individuals hired separately.

Some general contractors charge a daily rate between $300 and $900. However, most will charge a labor fee based on the project cost—around 20-30%.

Electrician Costs

Sunrooms almost always have electricity, even if it’s just a few outlets and a ceiling fan or light fixture. Electricity is complicated so even if you DIY most of a sunroom, you’ll still need an electrician. Expect to pay an electrician $70 to $120 per hour for their work. Common sunroom addition electrical jobs include:

·       Installing an outlet: $300

·       Adding a light fixture: $500

·       Rewiring: $6,000

·       Installing a light switch: $150

Glass Installation Professional Costs

Sunrooms let in sun through windows, so you’d be right in assuming a window professional is someone you need to hire if you don’t go with a general contractor. Expect to pay between $60 and $140 an hour for a glass pro. Sunrooms are a large project and a pro likely won’t work alone due to the weight of the materials, so you can expect to pay each additional worker $35 to $70 an hour.

Sunroom Cost by Location

The cost of a sunroom varies depending on where you live.

Permits and Insurance

Any addition to your home requires a building permit, which costs between $400 and $1,500. Acquiring a permit usually takes between two and eight weeks, and is an essential step in the process. This ensures that everything is up to code and meets insurance requirements.

Site Preparation

If there’s no existing foundation to build on, expect to pay between $500 and $5,600 to clear the land and prepare the construction site. If you need trees removed you can expect to pay around $700 per tree, and land excavation comes in for $1,300 to $4,600.

Foundation

Pouring the foundation for a new sunroom costs between $1,000 and $6,000, depending on the square footage.

Insulation

Insulation costs between $500 and $1,500, depending on the materials and square footage of the room. If you’re learning how to build a four-season deck or sunroom, for instance, expect higher insulation costs to maintain a comfortable temperature during warmer and colder times of the year. While insulation is expensive, remember that it’s only a true year-round or four-season sunroom that requires insulation.

Doors

If you’d like to walk out into your gardens from the sunroom, patio door installation adds another $1,300 to $11,000, including labor and the door unit. While a three-season sunroom may not require many doors, a four-season sunroom would benefit from outside access—like, for example, connecting to a garden. Adding another door would also help with ventilation.

Heating and Air Conditioning (HVAC) Systems

The cost to add heating and central air conditioning to your sunroom is $2,300 to $20,500. The price varies depending on whether or not you’re expanding your existing ductwork or installing a ductless mini-split system. A less expensive alternative is using a window air conditioning unit and a space heater, but those items can have a significant impact on your utility bills. Like insulation, HVAC systems are unique to year-round sunrooms.

Interior Finishing

Finishes can range from $200 to $9,000, based on how much you have planned for the interior design. Expect to spend $1,500 to $4,300 on various sunroom flooring ideas and $2 to $6 per square foot on painting. If you start planning well in advance, you can find good deals on furniture for the room, bringing your costs down.

Cleanup

If you’re hiring a general contractor to help with the construction of your new sunroom addition, oftentimes, the cleanup cost will be rolled into the total project price. However, if you’re cleaning up a construction yourself or want to hire a crew, plan on another $280 to $670. Dumpster rental and haul-away usually cost around $300 to $525.

Landscaping

Adding final cosmetic touches with landscaping costs usually ranges in cost between $1,400 and $5,500.