How much does it cost to finish an unfinished attic or third floor?
We were recently asked this question: "We love this additional space on the third floor, and think it will make an incredible retreat for the kids. How much does it generally cost to finish an attic?"
In the Raleigh area, basements are not nearly as common as in other parts of the country. However, it is more likely that you'll see an unfinished third floor, or some attic space that can be finished.
It all depends on the size and price point of the home, as well as the style and size of the roofline.
If the builder has included stairs to the third floor or attic, the space can often be finished and add to the available living space of the home.
Some ideas for this space include:
- Hobby area
- Game room
- Kids play area
- Sports center
- Guest retreat
So what is the cost to finish an unfinished attic or third floor?
Generally, the minimum cost will be about $50 per square foot. This will include:
- Basic lighting
- Basic electrical outlets
- HVAC system (which will require an additional heat pump, AC unit, and duct work - the cost for this is usually about $6,000 alone)
- Insulation
- Drywall
- Paint
- Basic required trimwork
- Standard level carpet

Because the heating and air conditioning alone is such a high cost, it can be less cost effective to finish a smaller space, and the total cost per square foot will vary based on the size of the space being finished.
If you'll need to add a staircase, the price tag can be much higher - depending on what needs to be done to incorporate a staircase from the second floor to the third.
The expense of the project can also increase if you need to add any kind of windows or skylights.
Not only will you need to purchase the window, but if the structure is complete, you'll also need to remove siding and roofing, reframe the structure, add the window, and replace the siding and roofing.
Ask for a detailed quote for finishing.
Usually this will not include a bathroom - and the cost of adding a bathroom will vary depending on the finishes desired as well as what stage of construction the home is in.
If requested at planning stage, the plumber, framers, and electricians will be able to complete all work as they are finishing the rest of the home, resulting in some savings.
A third floor can be a great space for a homeowner to finish themselves over time, with some significant labor savings. Check with your local jurisdiction to see if any permits are required - you'll want to be able to count the area as finished square footage if you should ever want to sell your home.
You may also be interested in these Raleigh new home trend articles:
Formal Dining Rooms - Disappearing, or Here to Stay?
Tub Surround Tile Ideas - Photos and Tips
Top 5 Ways to Save Money - Family Room
Built in Bookcases - Ideas and Trends
Building a Green Home - Top Requested Features
Easy Guide to Buying a Lot - Raleigh Area
Finding Your New Home in the Raleigh Area
Stanton Homes makes it easy! We'll guide you through the entire process - select from thousands of different floor plans, and hundreds of different locations, with a focus on new custom homes in the upper $100s to the $500s. Custom design build options available too!
Call 919-278-8070 or visit www.StantonHomes.com to find out more about new homes in the Raleigh area today.
![]() |
![]() |
![]() |
![]() |
Articles copyright Stanton Homes 2006-2011. Unauthorized use is not permitted. Provided for informational purposes only, no claims are made by Stanton Homes regarding the validity of any statements. Please note: all listing information per MLS, and current as of posting date. Information subject to change. Stanton Homes does not make claims to ownership of any lot listings, but can work with homebuyers to purchase available lots and build. Home plans to be approved on an individual basis, subject to neighborhood restrictive covenants and lot restrictions. Ask for further information regarding any community, lot or floor plan. Photos represent typical homes and details of each neighborhood, to help highlight different options available in the Raleigh/Triangle area. No claim of ownership is made to homes or land pictured.









