Top 20 Home Addition Ideas, Plus Costs and ROI Details in 2021 –

If you are thinking of significantly expanding or improving your home, there are so many options and things to consider that it might be a little too much to deal with.

The nature of the renovation project itself, the materials required, the cost of hiring contractors, building permits, a reasonable return on investment for home improvements, etc., are all factors that should be taken into account. – The nature of the renovation project itself, the required materials, the cost of hiring contractors, building permits, a reasonable return on investment for home improvements, etc. are all important factors to take into account when planning your project.

The main costs involved in hiring a domestic helper are the ones you should keep in mind.

Regarding the cost of your project, keep in mind that you can expect an average of $50 to $100 an hour for an electrician, $25 to $35 an hour for a painter, and about $70 to $85 an hour for a good carpenter.

We have taken these average prices into account when calculating the cost of sales. Also note that the prices we are talking about are the American average, but the costs may vary depending on where you build. Coastal areas and large cities, for example, are probably more expensive than rural areas.

Top 20 best projects to help you visualize your own renovation path


When it comes to building a garage, you must first determine your budget and then decide on the layout you want.

You have two main design options: you can have a freestanding garage that stands on its own, away from the house, where you can also consider a second level for housing, workshop or storage; or an attached garage, which is on the side of your house and usually cheaper.

Whatever design you choose, you must take into account the following elements to get an accurate quote: the size you want (double, single, triple, compact, storage); the materials from which it will be made (for the walls – plasterboard, metal panels, plastic, cement; for the roof – plaster, polystyrene, cork, tile); the windows and the type of door you want.

Separate: You pay more in advance for a separate apartment to keep behind the house if there is no building land nearby.

Cost: Expect to pay between $15,000 and $25,000, including labor and materials, but you can expect to pay more if you bring the plumbing, electricity or air conditioning; and add another $5,000 for a second level. Cost per square meter : $35.00 – $50.00.

Locked in: The cheapest of the two attached garages is connected to your house; you save immediately by using the only wall you already have. That means you only build three walls instead of four. You can also take advantage of the proximity of electricity and plumbing in your home to save on installation costs.

via Atec Builders

Cost: A single garage should cost between $10,000 and $15,500, and a double garage about $35,000. This includes the cost of materials and labour. Cost per square meter : $45.

THE RETURN ON INVESTMENT: The best return on investment is in freestanding units, which create a living space above the garage itself. You can furnish a small bathroom and kitchenette and then rent this space for 100% (or more) profit.


At the terrace roof

There’s nothing like enjoying the morning or afternoon sun in your own solarium, and if you can include it as an addition to your home, we highly recommend it.

With glass walls inviting sunlight, you are protected from the elements all year round while relaxing in the sun.

The sunbeds are affordable and popular and are usually made of vinyl or aluminium. You can save money by giving up heating and using the room only during the hottest months (or in winter only when the sun shines directly on the room).

Cost: The average cost of an extra sunbed depends on the size and features you want. In general, you pay between $20,000 and $75,000, including labor costs for painters, carpenters and electricians. The average cost per square meter may vary: $50 – $200.

THE RETURN ON INVESTMENT: Adding a solarium increases the total value of your home. So if you plan to sell it soon, you should see a 50% return on your money.


By reaching closets or cabinets you can keep things in a room that can quickly become messy.

The freedom to organize your clothes in an open space without throwing everything away in drawers that are difficult to organize, not to mention the extra storage space you get, makes buying a closet or wardrobe interesting.

If you have less space to work and less storage space, a cupboard is the ideal choice. Depending on how much space you have, you can choose between the practice and the rich apartment.

If you only have one wardrobe or closet, why not buy in bulk – this way you can furnish all the rooms. This saves you money and gives you a good return in the long term.

Cost: For a basic wardrobe of about 1.5 meters wide you spend on average $1,500 to $2,000; for a wardrobe $1,000 to $2,500. This price rises if you have to build extra walls. Average cost per square meter : $10 – $15.

THE RETURN ON INVESTMENT: 100%. Pay $2,000 for the closet, and when you sell your home, you can easily ask for an extra $2,000 for the total price.


via simple expansion modules

The family is growing and you don’t have enough space, but instead of moving to a bigger house in another suburb, consider adding another room to your house. It’s easier than you think.

Choose the addition of a room on the side of the house or the addition of a second floor; the first option is in many cases much more affordable and practical.

The building can be a single room or a whole floor and in both cases the price will rise.

Cost: Bedrooms usually don’t need a lot of hidden extras, so you can expect to pay between $150 and $250 per square meter, including labor costs, if you decide to build on the side of the house.

THE RETURN ON INVESTMENT: An annexe increases the immediate value of your property by widening the perimeter of the building, even if it reduces the size of the yard. If you sell, expect a positive return on investment of about 50%.


above the ICF on the slope

There are a lot of dormitories for the show. They make properties more attractive to anyone passing through or considering a purchase, or they can be more practical because they give you the added benefit of more attic space.

Adding a dormer window in the attic or placing a dormer window in the barn at the back of the house can help transform it into a more habitable and flexible space.

Cost: Skylights aren’t cheap. Your installation will cost between $10,000 and $25,000 (or more), depending on the size and location of your home and the materials required. Average cost per square meter : $60 – $120.

THE RETURN ON INVESTMENT: The extra space, the lighter and more pleasant style of the house are extra advantages if you decide to sell. We would say that you will achieve a financial benefit of about 40%, but the benefits of additional lighting will also reduce your electricity bill by another 20% in 10 years.


by the fire Outdoor kitchens

Enjoy the summer with all the benefits of an outdoor kitchen, perfect for entertaining friends and family or just for yourself. If you are considering adding it to your home, there are several factors to consider.

The most important thing is the grill – what type, size, style do you want or need to feed all those hungry mouths? Do you need gas, electricity or an open fire?

Then you have to decide on other functions: tile or stainless steel countertops are the most popular and durable; you may need storage space; you may need a refrigerator.

What about the sink? Or are you close enough to a real kitchen to get rid of it in a few simple steps? These are just a few things to keep in mind.

Cost: About $5,000 for something simple, up to $150,000 for an extravagance. Average cost per square meter: $25 to $70, depending on the materials.

THE RETURN ON INVESTMENT: Immersed in a life of luxury, enjoying the sunshine and cherishing the glory of your great kitchen, we are committed to giving 100% when it comes to pleasure.

If you decide to sell, you can get a 100 to 200% return on your investment by living in beautiful sunny surroundings where new owners will benefit greatly from the opportunity to enjoy the outdoors.

  1. DEC

per autumn timber construction

Winter has left the building and the weather is getting warmer. There is no doubt that you can’t wait to get back into the sun, and there is no better way to enjoy the warmer months than with your own terrace built at the front, side or back of your house.

The design of the deck is quite simple, so you really only pay for the materials you choose (cedar wood is popular), the size and the labour. Moreover, the terrace is also an ideal place for your outdoor kitchen; and you pay extra if you also want a roof.

Cost: Between $2,500 and $10,000, including labor and materials. Add $500 to the $1,500 for the roof. Average cost per square meter : $50 – $150.

THE RETURN ON INVESTMENT: You’ll be the most popular host in town with your new deck, so you can expect a return on your investment of over 100% for popularity, and 80-100% for financial gain if you use the right materials to make it both visually appealing and practical.


to periodic architecture

Butler’s Pantry, also known as the Pantry, has existed for centuries, although it has been removed from most houses built in the last 50 years or so.

Nowadays, however, the addition of a butler storage is becoming increasingly popular and many homeowners are taking advantage of the benefits it can bring to your kitchen and the value of your home.

The butler’s pantry is essentially a small room adjoining the kitchen which usually has a sink, a sink, space for refrigerators and dishwashers, and plenty of storage for crockery and linen. This keeps the clutter in the kitchen hidden from guests and children. Move it to the side, add it to another room or use the extra space in the kitchen or dining room. Practical and useful.

Cost: It depends on the size and materials (saving money by using cheap materials – the part is hidden anyway!), but you can expect to pay between $1,000 and $10,000. Average cost per square meter: $80 to $200.

THE RETURN ON INVESTMENT: Extra storage space is always a bonus. We think you can make a profit of at least 50%, up to 200% if you use budget support, simply because of its practical usefulness.

  1. SHED

Building a barn on your property gives you extra storage space for things like your lawnmower, and extra play space if you decide to use it as a workshop.

The sheds are also perfect manholes and large spaces for your next do-it-yourself or car restoration project (out of sight, out of mind, so you can do as much damage as you want without getting into trouble).

Cost: $1,000 to $5,000 depending on size, including material and labor. You will spend more if you want to include the heating, ventilation and air conditioning systems and the electrical systems. Average cost per square meter : $20 – $25.

THE RETURN ON INVESTMENT: If you use your barn as a living room or recreation room, you will get a 200% return on your investment in no time. Financially, a shed will add value to your home, and the likely return will depend on your spending. Expect 50 to 80 percent.


Your family’s growing and one bathroom isn’t enough anymore. The best solution is then to build a second bathroom or a bathtub.

Think about the features you want – is a shower enough or do you also want a bath? Are you looking for something more economical or is money not an option?

There are both cheap and expensive options for all your bathroom needs, from taps to plumbing, from floor coverings to taps.

Luxury options include gold-plated fixtures and expensive whirlpools; budget options can include a simple shower, washbasin and toilet in a space of a few metres.

Cost: Expect to pay between $8,000 and $15,000 for a medium sized bathroom with a shower, toilet and basic sink.

Add $4,000 for the bath and $3,500 if you want new floors. If you want to go there in luxury, with jacuzzi, double shower, sauna, etc… – you can pay up to $100.000 (or more). Average cost per square meter : $100 – $250.

THE RETURN ON INVESTMENT: For a middle class bathroom, the financial return is about 60%.


via Yankee Barn Homes

One of the great qualities of living on a large piece of land in America is the ability to own your own farm animals. If you are considering offering them extra housing, especially as winter approaches, building a simple co-op is a simple option that requires minimal preparation.

Determine whether the space is for animals or for storage, what type and size of barn you want, which materials (steel, timber frame, pile sheds) require special permits, depending on your condition (especially regarding the number of animals you can have), whether you need electricity and whether you need an attic.

Cost: Adding a warehouse to your home will cost about $4,000 for a small item, up to $55,000 for an item larger than 1,000 square feet, including labor and materials. You pay extra if you have to install electricity and plumbing. Average cost per square meter : $10 – $25.

THE RETURN ON INVESTMENT: It depends on the size and the quality, but since sanding generally lasts 40 to 100 years, we think you can easily achieve 100% efficiency over time. If you decide to sell your property, expect to get about 75%.


One of the biggest problems with cellars is that they are a refuge for fungi, which can be harmful to both your health and the foundation of your house. A wet basement can be a nightmare, whether it’s caused by the weather or a leaking pipe.

Once you have cleaned up the mess (or have hired a professional to do so), you should think about waterproofing your basement to clean and protect any cracks in the walls or floors, and of course an expert will be able to determine where the water comes from.

Cost: Hiring someone to waterproof your basement can cost as little as $250 for small problems, but up to $20,000 for a larger waterproofing project. The average is about $7,500. Cost per square meter : $10 – $25.

THE RETURN ON INVESTMENT: There’s no such thing as security. So when you think about waterproofing, you help to prevent harmful fungus and protect the foundation of your house (more than 200%).

  1. PATIO

Imagine the solarium above where you can sit, relax with a cup of coffee and enjoy the warmth of the sun shining on you all year round. Then add a fresh breeze blowing through your garden with a fresh scent.

The terrace is just a solarium, without walls, so you have the best of both worlds.

You have a floor underneath you and a roof over your head, but you don’t have any walls that isolate you from your natural environment and stop the wind.

However, one of the main advantages of a patio is that you can transform it into a solarium by adding walls, or you can just install screens to keep insects out.

Cost: Between $9,000 and $25,000. Average cost per square meter: $10 to $30.

THE RETURN ON INVESTMENT: More living space, possibility of conversion into a conservatory, enjoying the outdoors = 100%. And if you want to sell your house for a higher price, we estimate that you will have an income of at least 80%.


via Whole House Check.

If you don’t have space or budget for a garage, a garage is the best option. A well-equipped garage usually has a concrete base with metal or wooden poles and a roof.

The garage protects your car from rain, hail, snow and sun and provides a covered area if you need to carry out maintenance work or if you want to set up a small workshop.

Cost: Depending on the foundation and the lower levels, building a garage usually costs between $3,000 and $15,000, including labor and materials. Average cost per square meter : $5 – $10.

THE RETURN ON INVESTMENT: You can increase the value of your property by an average of $5,000 to $10,000, so you should get a return of almost 100%.


via simple add-ons

Call it grandmother homes, call it apartment – anyway, it’s one of the most popular residential trends to come onto the market this year, both in terms of construction and property sales.

This small apartment is ideal when family members come to visit (to visit the grandchildren – hence the grandmother aspect) because it is a small apartment that is separate from your home.

Typically, grandmother’s apartments are located within walking distance of the front door and average between 600 and 750 square meters. They are practical and elegant additions to your home. You can even rent it out to a student, a couple or a young family.

Cost: Approximately $90,000 on average for a separate bedroom, bathroom, kitchen, living room and laundry room, plus a closet and utility room. Average cost per square meter : $100 – $150.

THE RETURN ON INVESTMENT: Parents come with their own property – 100%; rent it long-term – 100%; sell their property – 100%.


If you want some more space for your hobbies, maybe space to work on your art, or if you need extra storage space that will not fill your house, a separate addition is a good idea. Basically, it is a small barn space that you can build anywhere on your property. You can even use it as a guest room without investing in a grandmother’s apartment.

This is what you should consider: Is the excavation and preparation of the site necessary? If this is the case, you will probably have to submit a site plan to the local building department for approval.

You can hire a professional surveying company for about $1,000 or get a simple floor plan of a company such as 24-hour plans for about $100.

Do you need insulation, plumbing, electricity? Do you want it to look exactly like your house? What about windows and doors?

Finally, what type of flooring do you want (carpet and tiles are generally cheaper than wood)? All the above comes on top of the cost of an individual addition and should be carefully considered during the planning/evaluation phase of the project.

Cost: You can build a small insulated addition without heat, plumbing or electricity for $15,000 to $20,000, including labor and materials; or, if you want minimal extras, it can cost $25,000 to $30,000. Cost per square meter : $15 – $30.

THE RETURN ON INVESTMENT: Usually 100%, but if you don’t get a full refund, you can expect at least 80%.


about Cedar House

A playhouse, also called a playhouse, is a nice place where your children can play or take a break from the stress of parenting.

Although many people often choose to do it themselves, it can be more economical to hire a professional to build your playhouse, not to mention safety!

Choose from many different styles and sizes and add all kinds of features to enhance your child’s room. You can also use recycled materials or choose a smaller style to save money.

Playhouses are usually easy to move, so if you move, you can take them with you.

Cost: A playhouse can be built for just $500; it can cost up to $10,000. Average cost per square meter: $10 to $20.

THE RETURN ON INVESTMENT: The sale of the house is 100%. Easy to move for years of fun for your kids – 100%. A place where children can play while finishing the book and drinking a glass of wine is priceless.


24-hour plans

Change is as good as a vacation, and although there is a renovation craze in the United States, be aware that if you’re thinking about changing your existing layout, you can expect significant costs.

The more you change, the more it costs. For example, if you plan to move your kitchen to the other side of the house, you should think about plumbing.

If you add extra space, make sure you have all the necessary permits and files for extra materials, electricity, plumbing, etc.

Cost: The first cost you will encounter is actually a floor plan designed by an architect and submitted to the municipality for approval. It can cost between $1,000 and $5,000.

Then you have to pay for the project itself, which varies from a few thousand to a few hundred thousand dollars, depending on the number of changes you make to the property. The average cost per square meter depends on the project.

THE RETURN ON INVESTMENT: It’s hard. It depends on how much you want to spend in the first instance in relation to the amount you have paid for the property. If you bought a property for $300,000 and spent $100,000 to change and improve it, you can probably sell it for $400,000 with a 100% return. But on average you can probably not expect a return of more than 80%. That’s why most people adapt their current layout to take advantage of it instead of taking advantage of sales.


via Kensa heat pumps

These systems are also known as geothermal heating and offer American homes energy efficient heating options that provide extra comfort and reduce electricity bills. They come in different sizes, including the size of the ground loop required for installation, depending on the heating capacity your house needs.

The average property uses a 3-ton facility, but this variation depends on the availability of land, the local geology and the size of your property. The biggest advantage is that the U.S. government offers tax credits for energy efficiency, and at state level you can even get other incentives.

Cost: It usually costs about $15,000 a ton, up to $25,000.

THE RETURN ON INVESTMENT: Currently, you can benefit from a tax credit of 26% when you invest in a geothermal heat pump for your home; moreover, you benefit from a lower energy bill and an increase in the value of your home. In 2 to 10 years your investment will be fully recouped.

Note that the GeoHeat tax credits have recently been extended by two years, which means that you can claim a 26% tax credit for the installation of a geothermal heating and cooling system until the end of the year 2022. In 2023, the tax credits will be reduced to 22%, which is the last year in which federal tax credits for geothermal heating and cooling systems will be used.


Solar energy is getting cheaper and cheaper every year, and there are so many advantages to investing in solar energy, such as lower maintenance costs, environmental benefits, reliability (as long as the sun shines, you never have a power failure!), and a lot of other benefits.

Although the initial costs seem substantial, the return is worth it in the long term. And as with heating, the biggest bonus offered by the U.S. government is a 26% discount on purchases of solar energy. Please contact your local authority as you may be entitled to other incentives.

Cost: An average of $15,000 for a 5 kW system before applying a discount of 26%. Average cost per installed watt : $3.00.

This means that the total cost of a 5 kW solar system after the 30% federal ITC discount will be about $10,500.

The above price breakdown does not include additional discounts or incentives granted by the government. Many states such as California, Nevada, Arizona, Massachusetts, Washington and others offer generous local incentives.

Pay attention: Despite the immense success and popularity of the Solar Investment Tax Credit (SITC), the value of this credit will unfortunately start to decline after 2022. The current federal 26% ITC for solar energy was recently extended by Congress until the end of 2022. In 2023, which is expected to be the last year before the residential solar tax, the cost of the ITC will drop to 22%.

Return on investment: 26% immediately; 100% repayment within 6 to 9 years.


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