New Home Tips, Trends, and Ideas - Raleigh Custom Home Builders

How Much Does it Cost to Finish a Third Floor or Attic?

Posted by Penny Hull on Mon, Jul 10, 2017 @ 14:07 PM

Cost-effective ways to finish third floor or attic space

Looking for ways to add low-cost square footage to your new home, with space for a future  hobby area, game room, 'man cave', or guest retreat? 

It's typically more cost effective to add additional living space into the upper floors of your new home than adding onto the footprint.

But keep in mind that attic space is very different from unfinished future living space - so any area you're considering expanding into has to be engineered and built for the intent of its future use. Building codes are different for storage space in attics, so if you want that to be heated square footage on day, your builder has to know that before applying for permits, so that the architectural blueprints can be revised to include appropriate requirements. 

Learn more about building a new home in the Raleigh, NC area, below - with more important questions to ask your builder

How Much Does a Third Floor or Attic Cost? | Cost Effective New Homes

How Much Does it Cost to Finish a Third Floor or Attic?

The cost of turning unfinished bonus rooms into heated square footage depends on several factors, including:

 - Engineering requirements in the architectural plans

 - Roofline Style and Size

 - Size of the space to be finished

 - Potential staircase access  

 - Would you want to add a future bathroom?

 - Would you want to add windows or a skylight?

How Much Does a Third Floor or Attic Cost? | Cost Effective New Homes

Changes to attic space to create unfinished future living space can start at around $50 per square foot.  Things to take into consideration include:

 - Framing and flooring engineering and materials

 - Lighting

 - Electrical outlets

 - HVAC system which will require an additional heat pump, AC unit, and duct work

 - Insulation

 - Drywall,  Paint, and  Trimwork

 - Carpet

How Much Does a Third Floor or Attic Cost? | Cost Effective New Homes

It can be less cost effective to finish a smaller space. The total cost per square foot will vary based on the size of the space being finished, and what requirements are for staircases and other additional elements necessary to meet Building Code Requirements.

The expense of the project can increase if you need to add any kind of windows or skylights. If you don't plan ahead, you will need to remove siding and roofing, re-frame the structure, add the window or skylight, and replace the siding and roofing. 

The cost of adding a bathroom will vary depending on the finishes desired.

How does a bonus room add up?

Talk with your builder about ways to add a bonus room to your floor plan, as a cost-effective way to increase your square footage. Read more about adding a bonus room and expanding your house size (for the lowest cost) in these articles:

How to make a house bigger - adding a bonus room

10 Ways to use a bonus room above the garage

Which is a better investment, a bonus room or basement?

How Much Does a Third Floor or Attic Cost? | Cost Effective New Homes

Can I add a third floor or attic later on?

An attic cannot be turned into living space later unless the correct engineering is in place. Check with your local jurisdiction to see what kinds of permits are required if your home has already been completed. 

As a part of a new home build, keep in mind that appraisers count unfinished space very differently from space that is heated and cooled. Talk with your lender and your builder, as you weigh your options.     

If you're thinking of ways to maximize your budget, make sure to get a full cost estimate from a custom home builder in the Raleigh/Triangle area before making any decisions.

How Much Does a Third Floor or Attic Cost? | Cost Effective New Homes

Tags: cost of homes with unfinished third floor, unfinished third floor, Raleigh Custom Home Builders, cost to build a home, custom floor plans