As you won’t need to build a foundation, roof, or structural components, finishing a basement, attic, or garage is one of the less expensive options to add a room to your house.
How much does the addition of an additional room cost?
How much does a 20-by-20-foot room addition cost? A 20′ by 20′ room addition may provide you the extra space you need in your home, and it is far less expensive than purchasing a new home. The average homeowner spends between $42,000 and $88,000 to install a room of this size.
The national average cost to add a 2020 room is $65,000. The fee ranges from $80 and $200 per square foot, with an average of $140 per square foot. Simply multiply the square footage by $140 to get the approximate cost of a room expansion or contraction. Average national cost: $65,000 Price range typical: $42,000 to $88,000 Exceptionally low: $15,000 Extremely luxurious: $200,000 These rates include the cost of supplies and labor from a general contractor.
However, keep in mind that every decision regarding building methods and materials can either increase or decrease this cost. For instance, if you add a prefabricated or modular room instead of a custom-built room on the first floor, the project may only cost roughly $15,000.
Primary Suite Addition – A primary suite costs between $25,000 and $160,000 to adapt an existing space or between $100,000 and $200,000 to build from scratch. The main suite is the largest bedroom type, measuring 400 square feet or more and featuring a huge sleeping area, complete bathroom, and amenities such as sitting rooms, walk-in closets, fireplaces, balconies, or outdoor access.
- Photo: bmak / Adobe Stock The average cost per square foot of a bedroom expansion is $200.
- However, this amount changes based on whether you are adding a new structure or converting an old one.
- A new room will cost $150 to $250 per square foot, but a conversion might range from $80 to $400 per square foot.
Typically, garage or basement conversions are less expensive than new builds since you do not have to develop crawl spaces, lay the foundation, or do any exterior finish work. However, attic conversions are one of the most expensive spaces to convert due to the necessity for HVAC systems, stairs, windows, and roofline alterations.
How much would an additional bedroom cost to construct?
Typical Price to Add a Master Bedroom and Bathroom – The typical cost of adding a master bedroom and bathroom to an existing space is between $40,000 and $140,000. Costs for a newly constructed expansion range between $60,000 and $120,000. This is based on a combined bedroom and bathroom size of 300 to 400 square feet.