Adding a room to your home can be an inspiring project that increases the living space, improves functionality, and adds value to your property. Before starting this process, it’s important to be well-informed about the prices to have a successful and safely done project.
The average cost for room addition ranges from $21,000 to $73,000, while the lowest price can be around $8,000, and the highest can go up to $130,000 or more, depending on materials, labor, design, room type, location, and your personal preferences.
Stay with us as we’ll dig deeper into the cost considering room addition. We’ll discover the factors influencing the price and provide valuable insights to help you navigate the entire process.
How much does it cost to add rooms to a house?
The average range for adding a room goes from $21,000 to $73,000, and the price depends on a lot of factors such as labor, materials, location, design, etc.
In the table below, check out the prices for room addition:
| Average range | $21,000 – $73,000 |
| Lowest price | $8,000 |
| Highest price | $130,000+ |
In the following text, let’s talk about the average cost of room addition in more detail.
The average cost of a room addition
The average cost to add a room is $49,000 while the price range for adding a room goes from $21,000 to $73,000.
In the table below, you can check the average cost for different room addition types:
| Room type | Average total cost |
| Bathroom | $10,000 – $20,000 |
| Bedroom | $16,000 – $26,000 |
| Family room | $26,000 – $41,000 |
| Kitchen | $21,000 – $51,000 |
| Primary suite | $46,000 – $136,000 |
| Sunroom | $16,000 – $106,000 |
Now let’s explore the prices when it comes to room addition cost per square foot.
Room addition cost per square foot
The average cost for adding a completely new room to your home ranges from $150 to $300 per square foot. The final price depends on the type of room and the need for fixtures, additional plumbing, or electricity.
Let’s see the average cost per square foot by room type:
| Room type | Average cost per square foot |
| Bathroom | $180 – $230 |
| Bedroom | $130 – $180 |
| Family room | $130 – $180 |
| Kitchen | $250 – $300 |
| Primary suite | $180 – $250 |
| Sunroom | $150 – $400 |
Understanding the cost per square foot is leading us to explore different room sizes and how they affect the overall project costs.
How much does it cost to add on a room by size?
There are many different options and dimensions when we talk about a room addition, but you should always adapt to your wishes and possibilities. Adding a room by size will best be understood by looking at the prices in the table below:
| Room addition size | Square footage | Average cost |
| 10×10 | 100 sq. ft. | $13,000 – $26,000 |
| 10×20 | 200 sq. ft. | $26,000 – $51,000 |
| 12×12 | 144 sq. ft. | $19,000 – $37,000 |
| 20×20 | 400 sq. ft. | $51,000 – $101,000 |
| 20×30 | 600 sq. ft. | $76,000 – $151,000 |
| 15×40 | 600 sq. ft. | $76,000 – $151,000 |
| 20×40 | 800 sq. ft. | $101,000 – $201,000 |
| 25×40 | 1000 sq. ft. | $126,000 – $251,000 |
The most common room addition sizes are:
- 10×10 room addition
- 12×12 room addition
- 20×20 room addition
10×10 room addition cost
This size of room addition costs between $13,000 to $26,000. This type of space is good for a home office, storage area, kid’s bedroom, or craft room. It’s a good amount of space that can be used for different things.
12×12 room addition cost
Adding a room whose dimensions are 12×12 can cost from $19,000 to $37,000. This is a great space that can be turned into a bedroom.
20×20 room addition cost
Room addition of a 20×20 size costs from $51,000 to $101,000. This size of the room is very big and is adequate for a living room, dining area, or family room.
Now that we’ve established the prices for different room addition sizes, let’s address the cost of adding a room by its type.
Cost of adding on a room by type
Every room has different installation requirements which can significantly impact the overall cost of the addition. Because of that, it’s important to be well-informed about the prices for different room additions.
In the following text, we’ll break down for you the costs for room addition depending on the type of room that you want to add to your property.
Cost of adding a bedroom
Bedroom addition cost on average ranges from $16,000 to $26,000. The cost depends on whether you are building a completely new room or repurposing a space. If you want to build a new bedroom, be ready to pay from $35,000 to $105,000, as the price can go as high as $220,000 for a large primary bedroom with features such as a walk-in closet, bathroom, and balcony.
Cost to add a bathroom
The cost to add a bathroom addition goes from $6,000 to $76,000 depending on the features, fixtures, and size of the bathroom. Adding a bathroom is a great investment as you can expect a return on your addition of 50% to 70%.
Master suite addition cost
Master suite addition is very pricey and it depends on the size of the suite you choose. There are three most common sizes when it comes to master suites.
- 400 sq ft master suite addition costs from $82,000 to $210,000
- 600 sq ft master suite addition costs from $130,000 to $305,000
- 300 sq ft master suite addition costs from $70,000 to $160,000.
Cost to add a bedroom and bathroom – primary suite
The primary suite is one of the most expensive additions because it includes a bedroom and a bathroom. The cost ranges from $32,000 to $105,000 but it can vary as it depends on the materials you use and the added features.
Family room addition cost
This type of addition costs from $26,000 to $41,000 or more, depending on the size of the room, materials, and design preferences.
Cost to add a kitchen
Adding a new kitchen requires plumbing and different appliances that significantly increase the overall cost. Kitchen addition cost ranges from $50,000 to $96,000.
Cost to add a living room or dining room
The average cost of living or dining room goes from $18,000 to $44,000. They cost less as they don’t have plumbing or appliance needs.
Cost to add a room above the garage
Adding a room above the garage costs $120 per square foot while the average price is $46,000. The cost depends on the need for building a staircase or changing the structure of the garage that already exists. If needed, those structural changes can add up to $12,000 to $43,000 to the overall cost.
Cost of adding a laundry room
Adding a laundry room isn’t expensive as it’s one of the smaller rooms you can add. The average cost of laundry addition goes from $6,000 to $8,000, but if you want to upgrade the appliances, install more shelves, or install a sink, the cost can be up to $12,000 or more.
Cost to add a mudroom
Mudrooms are very cheap to add as they don’t require plumbing and are very small. Mudroom addition ranges from $3,700 to $7,500 depending on the storage you add and the type of floor.
Cost to add a sunroom
A basic 200-square-foot three-season sunroom installation can cost $30,000, while the cost to add a sunroom that’s for all seasons costs around $85,000 or more.
Cost to add an in-law suite
The cost of adding an in-law room ranges from $45,000 and $110,000 depending on the complexity of the project.
After discovering everything about the room addition costs by type, let’s explore the factors that influence our budget and the overall costs.
Room addition cost factors
When planning a room addition process, it’s important to consider all the factors that influence the overall cost. Let’s see the most important room addition cost factors:
| Room addition cost factors | Costs |
| Architectural services | $2,500 to $9,000 |
| Demolition and site prep | $1,500 to $5,500 |
| Foundation materials | $4,300 to $13,500 |
| Roofing | $90 to $100 per square foot |
| Support beams | $1,200 to $4,800 |
| Drywall | $1 to $3 per square foot |
| Door installation | $1,200 |
| Window installation | $250 to $2,550 |
| Flooring | $1,550 to $4,600 |
| HVAC installation | $1,200 |
| Electrical | $2 and $4 per square foot |
| Plumbing | $1,200 to $10,400 |
| Painting | $3 to $7 per square foot |
| Framing | $7 and $10 per square foot |
Before starting any construction process it’s important to have a building permit. Obtaining the necessary permits is very important as building without a permit can cause legal issues and problems with the local building department.
Building permit cost ranges from $140 to $3,000, and the average cost is $500. It’s essential to consider this cost factor when planning a budget for a room addition project because a building permit ensures that the project is running smoothly and according to local codes and zoning regulations.
Understanding the factors that influence room addition costs is an important part of the process. Now, with the knowledge of different prices, let’s see what’s better for us, to extend the room or to add a room.
Cost to extend a room
Room extending is a great way to renovate the space without the need for a full-scale addition.
To extend an existing room and make it larger, you will need to pay from $90 to $220 per square foot. The cost range for room extension, also known as bump-out addition, goes from $15,000 to $55,000, and for more complex projects, the price can go up to $105,000 or more.
This type of addition creates additional space as it extends the footprint of the room outward. The price is influenced by the size of the extension, labor, location, and used materials.
It’s a cost-effective solution that increases living space as it’s a less complex project than a full-room addition. The construction process for this type of work is shorter as the extension utilizes already existing foundations and structures. Room expansion can be used to enlarge dining rooms, kitchens, bedrooms, or any other space to provide more comfort.
After we considered all the factors and whether we should add or extend a room, it’s important to decide whether we should hire a pro to do it for us or try to do the project by ourselves.
Cost of DIY vs. hiring a pro for adding a room to the house
Adding a room to the house is a complex process that requires a lot of knowledge and hard work. Because of this, it’s always better to hire a professional who will ensure that the work is done properly and safely. Hiring a contractor costs from $60 to $120 per hour.
A building contractor will make sure that the construction process goes according to the rules of the local building department. A professional contractor provides higher quality and efficiency because they have all the necessary skills and tools to navigate through the project. They also make sure to provide a site plan and all the permits that are necessary for a successful room addition project.
Although the DIY approach is very tempting because it costs less, it’s not always the best idea. Yes, it does save money for labor, but you can’t do everything alone. However, certain things can be done such as painting, cleaning the site, demolition, or fixing and adding small features. DIY depends on your abilities so if you lack experience in construction and architectural drawings, hiring a professional is a better option as any potential mistake you make can cost you more money to fix it.
Whatever approach you choose for your room addition project, it’s good to know the tips on how to save money during the process. In the following text, let’s see how to save our budget.
Tips on saving money when adding a room
Home addition cost varies and as we mentioned, it depends on a lot of factors such as the size of the addition, materials used, location and labor costs. Because of this, building a room addition to your home is a costly process that requires investing time and money.
Here are 5 tips on how to save money when adding a room and staying within your budget:
- Avoid using expensive materials and use those that are more budget-friendly.
- Do some work yourself, such as painting, trimming, and cleaning the site.
- Try to stick to the budget you determined at the beginning.
- Get a few estimates from different contractors and decide what’s best for you.
- Keep your design simple and avoid features and fixtures that increase costs.
Now that we have the tips for a successful room addition project, let’s address some of the most frequently asked questions.
Cost to add a room to a house FAQs
What is the cost of adding a room to a brick house?
Adding a room to a brick house usually costs $90 to $210 per square foot. The cost depends on many factors such as location, materials, size, and the complexity of the project.
What is the cost of adding 2 rooms to a house?
The cost for this type of project depends on the type of room you’re adding and the factors that affect them. You can expect to pay from $45,000 to $105,000 depending on the scope of the project and your personal preferences.
How much does it cost to add a room to a house in Texas?
The cost of adding a room to a house in Texas ranges from $150 to $250 per square foot.
Does room addition add value to my property?
Yes, any type of addition that increases the square footage of your home, increases the value of your property. The average ROI for a room addition is around 50% to 70%.
Adding a room to a house can be a transformative investment
We’ve explored different factors that affect the overall cost of adding a room, so now, with all the knowledge, you are fully prepared to start your room addition project. Adding a room to a house is an exciting process, that offers numerous benefits as it’s a transformative investment that gives you more comfort, and functionality, and increases your home value. With that in mind, room addition is a great option for you and your property.
Remember that you must provide the necessary permits for a smooth room addition process. If you need assistance in obtaining site plans for permits be sure to contact us. Our team will provide all the information regarding site plans to meet the permitting requirements of your local municipality, and with that, we’ll make sure you get the room addition of your dreams!
