Planning a modern house extension with a contractor
Category House expansion
3 September 2024,
 Off

Do you need more room or space in your home? A house extension is an option if you just need another room.

Technically, a house extension “builds out” rather than up.  Examples of a house extension include installing a patio, a sunroom, an outdoor kitchen, a garage, etc.  However, many people also refer to these projects as home additions although strictly speaking, a home addition is usually for building an upper storey.

Planning a modern house extension with a contractor

A house extension is an excellent way to add space and value to your property.  As your need for space grows, you can increase space without buying another house.  

Learn more about creating new space with a house extension and compare multiple quotes from reputable contractors to save time.

Connect with our experienced partner contractors for house extension using our free online form!

Advantages of building a house extension

A sunroom addition for more livable space

Homeowners build a house extension for different reasons. The most popular reasons are:

Increase in livable space

Many people don’t relish the idea of selling the home they have lived in just because they need a bigger house.  A house extension can solve the problem of space and save you the hassle of moving to a new home.

Cost Efficiency

Constructing an extension is cheaper than buying a new house.  You already have the structure in place and you save on moving expenses and taxes.

Customization options

A house extension allows you to customize your home based on your needs. You can choose a design that complements your existing structure. You can also make modifications that address your needs to fulfill anything that is lacking in your current home.

Increase in resale value

A house extension is an investment that increases property value over time.  It can also help to sell your property faster and for a higher price in the future.

How much is a house extension in Ontario?

Modern house extension featuring a veranda with a view

In Ontario, the cost of a house extension depends on several factors that include the type of extension, location of the property, design, size, and finish. These factors will also influence the cost of labour involved.

The average cost per square foot for a house extension ranges from $250 to $600, taking into account the complexity of the project and quality of the construction.  For a house extension of 1,000 square feet, it could cost from $250,000 to $600,000++. The actual cost can vary based on selected materials and other details.

For a more accurate understanding of the cost, speak to experienced contractors who can design a plan based on your needs and wants and offer quotes tailored to your budget.

A house extension can increase your comfort, improve the functionality of your home, and add value to your property.  It is a significant investment that requires thorough planning and budgeting.

Hire a professional contractor who can provide quality work within your budget by comparing multiple quotes today. Just fill out our short online form to get started and receive no commitment quotes.

Types of House Extensions & their Costs

If you are feeling constricted in your home and dream of a little more space to move in, you can consider any of the following types of house extensions.

Rear Extension

A rear extension is the simplest type of house extension.  It allows you to extend your living space from behind your home, usually from the kitchen and into the garden.  It is ideal for properties without a side return and the only direction to build out is from the rear.

It may be small in size but can allow you to have significant space, especially for entertainment.  Because of its simplicity, the cost is generally low.  It also allows you to have great lighting as you can install full doors and large skylight windows for maximum light.

Side Return Extension

Similar to a rear extension, a side return extension extends to the side, using an alleyway or side return.  

It could be a good option for homeowners who want more space without disturbing the rest of the home.  A smart design using the side return which is normally empty can increase the size of the kitchen or area near it.

Again, this type of extension is simple and is faster to complete.  Thus, it is a less expensive option for a house extension.

Wrap-around extension

A popular house extension is a wrap-around which creates an L-shaped space around the home. It combines the side return extension and rear to increase space.

Over-structure extension

Sometimes, it is not possible to extend on ground level. An over-structure extension is another option wherein part of the home, usually the garage, is used for building over it.  It is popular for building another suite or room.

If you don’t want to give up your garden space, building over part of your home can be the way to go. It is not as expensive as building a full second floor but it will give you more room.

Second floor extension

If you need maximum space, a second storey could be the answer.  An additional level on top of your existing home will double your livable space.  This type of construction will require more planning and will cost you more but offers you many more options to create your dream space.

You can consider the pros and cons of each of the extension types above. Don’t forget to also take into account the necessary permits from your municipality.  The fees are based on the size and cost of your extension.  You should also think about the impact of your project on future utility bills, insurance, property taxes, and maintenance.

Compare your options for a home extension today by filling out our short online form at no cost!

Building out vs. Building up

Constructing a second floor in a home

Building out is generally cheaper than building up.

Before planning your project, consider your budget, the type of room or rooms you need, and your available space.  Your answer will help you to determine whether to build out or up.

Typical Ground level extensions 

  • Sunroom
  • Family or living room
  • Garage
  • In-Law suite with separate entry
  • Kitchen expansion or patio
  • Laundry room 
  • Home office

     

Side extensions are ideal when you have significant space in your side yard that is available. Popular room additions to the side of homes are bedrooms, bathrooms, and suites. Kitchens can be relocated to the side.  An attached garage can also be constructed on the side of the yard.

Typical Second Floor extensions

  • Master suite 
  • Family rooms
  • Guest rooms

For a vertical extension (build up), the roof will be removed. You will need to move out temporarily while the roof is off.  Your utility services (water, power, and internet) will also be off during the construction. 

A staircase will also be added on the ground floor which will reduce the square footage available.  Your designer or contractor can find a convenient place to install a staircase.

The size, shape, and current footprint of the home and your yard space will also point you to the right direction.  If you have a small yard, you have limited space for a rear extension.  A second floor addition or extension may be a better option.

Foundation, Supports, & Other Expenses

If you build up, you will add a foundation and other supports.  If you build out, the new space will need traditional foundation and framing.  A reputable contractor can give you a detailed breakdown of the cost of your project.

Further, the necessary permits will also increase the cost of your project.

Take 1 to 2 minutes to fill out our free form to connect with the best home extension professionals in your area.

What are the costs related to a ground floor house extension?

If you are planning your budget for a ground floor house extension, consider the following expenses.

  • Adding additional plumbing work
  • Permit fees
  • Pouring a new foundation
  • Upgrading HVAC

A ground floor extension is cheaper than a vertical extension but will give you limited increase in space.

Options for increasing livable space at a lower price

Some additions are cheaper. If you are looking for ways to increase livable space that won’t hurt your budget, consider the following options:

Attic conversion – $20,000 to $50,000

On-top-of-garage addition – $40,000 to $80,000

Basement finishing– $8,500 to $20,000

Ground floor extension: $10,000 to $20,000

Garage conversion: $12,000 to $25,000

Small bathroom: $10,000 to $20,000

Sunroom: $15,000 to $50,000

Plans and Permits for House Extensions

Architectural plan and drawings for house extension

Before you start building your house extension, get the proper permits to comply with the requirements of your city.

Due diligence will help you to know what type of house extension is permitted, the standard dimensions, and other options open to you. Most municipalities in Ontario require you to get your building plans drawn up by a technologist or architect before you can get a permit.  The cost of a plan could be anywhere from $2,500 to $5,000.  Typically, plans cost about 10% to %20 of the cost of the project.

Permit fees vary from one municipality to the next. It also depends on what you plan to build.  The average cost of a permit is $240.

It is relatively simple to request for information regarding permits online for Toronto, Mississauga, Vaughan, Ottawa, Markham, and other areas in Ontario.

You should get in touch with your local planning department for more information.

Fill out our online form to connect with designers and architects for plans for your dream house extension!

Find a house extension contractor for your project

Any type of home renovation is important and must be done by a qualified and reputable contractor.

These professionals offer experience, qualifications, insurance, and warranties for your peace of mind.

When it comes to a house extension, you need quality construction to protect your investment and home value.  

Our reputable partners in your city ensure that the construction complies with legal requirements and meet quality standards to avoid future problems.

Compare our verified partner contractors by filling out the short online form below to receive FREE and NO-OBLIGATION quotes.

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