Goto main content

Our service now covers areas all across Canada

Table of contents
Obtain 3 free quotes for your home addition
Attach a file

By submitting your project, you agree to our Terms of Use

How to Build a Home Addition

Last modified: 2022-12-05 | Approximate reading time 5 mins

Building a home addition is beneficial in many ways. Whether accommodating new members of the family or just looking to add a bit more space, homeowners choose to add rooms to their homes for a variety of reasons. However, you can’t just place an extra room on the side of your house and call it a day! Home additions take careful planning to be executed properly.

There are several steps that one must consider before diving head first into a home addition. From designing the room itself to securing permits and contractors, homeowners must be aware of all that is involved in this complex job. Luckily, is here to give those interested some guidelines alongside a checklist of all the important home addition things!

Here's how to take on a home addition project!

Choose the Style of your Home Addition


source: pixabay, paulbr75

Home additions come in all shapes and sizes! This project requires homeowners to choose a style that works best for their homes and their family.

Match the old to the new

First, consider how you can integrate your addition into your current abode, making sure that the new space blends in with your home. Most homeowners want their addition to appear as though it has always been in place. You’ll want to repeat design elements both inside and outside of the home to make things cohesive.

Match finish materials such as siding, roofing and trim. Of course, not every element of the addition must exactly match with the original structure. If you can’t afford to replicate certain aspects, don’t worry too much, as it is easy to tie things together through colour and overall feel.

Planning a home extension project?

Fill out the form so that we can put you in contact with certified contractors from our network

Building up or out?

There are two main ways to add to the structure of a house, either building horizontally or vertically. Most additions consist of increasing your home's footprint, and many homeowners take on first-floor additions, choosing to build out. Building out involves less disruption to the existing structure as well as to daily routine and home life. It is easier to live through this type of addition. For smaller additions, it is recommended that you stick to the main floor.

Of course, building out means that you lose some yard space. Also, make sure to check with municipal laws that could dictate whether this type of renovation is possible. Building up does not expand the footprint of the house, adding another story, expanding an already existing top floor, or adding a room over a garage or porch.

Although your home's footprint isn’t growing, work to strengthen the existing structure and foundation will be necessary to accommodate the extra weight. Again, make sure to check municipal laws to be certain of any height restrictions that may be involved.

Floating addition

To avoid foundation work when building smaller additions, a floating or hanging addition can be an excellent option. A contractor may have to determine if this type of extension is right for your home, as your home’s finished floor must be above the grade of the landscape outside. A floating addition requires no foundation work and will save the homeowner some dollars as a result.

Plan the Home Addition Building Process

Planning your additions building process will involve choosing the right materials and having everything ready. As we’ve stated, blending your new addition with the existing structure is the main goal of most homeowners. If you’re not able to fully blend new materials with the old, you’ll want something that compliments the existing home.

For indoor surfaces, if you have existing wood flooring, make sure you are aware that matching results may not be identical, as wood grains and stains always have slight differences. Tiles prove to have the same issues, as chances of finding perfectly matching tiles are slim. Certain companies can create reproductions of existing tiling, but don’t expect these to be inexpensive.

For outdoor surfaces, roofing plays a significant role in some home additions. If the roof of your addition won’t be connected to your current roof, you can easily get away with using a different material, either choosing the same material in a different colour or going for a different material altogether. Another option is to consider reroofing everything at the same time. Siding is another material that must be looked at.

Wood clapboards and shingles can be easy to replicate in their simplest form; however, elaborate cuts may need to be custom ordered. Materials such as vinyl siding and stone may be more difficult to match, so consider stucco or brick, as these are easier to work with.

Trim should be easy to mimic, and your contractor can likely find the same trim at your local hardware store. For specialty moulding on the outside of older homes, this may be harder. Custom milling is possible, and won’t cost too much. For all other exterior materials, such as doors, hardware, windows and paint colour, you shouldn’t have much trouble finding similar or matching solutions. Bear in mind that repainting an entire home exterior can add significant cost to an already expensive project, so try and avoid this unless it’s in the budget. 

Start your Home Addition Project!

Home addition

source: Pexels, Pixabay

As you’ve probably discovered, a home addition is a major project involving many aspects and people! The people you hire to complete the job are of the utmost importance, and completing this project smoothly will directly depend on your team. Depending on your addition, you’ll want someone who specializes in the trades that you need. If the project is quite large, it is recommended that you hire an architect. An architect will focus on design and structure, rather than colour and finish. They will look at the overall project design.

General contractors will be hired to oversee the building process, subcontracting out specialized work such as electric wiring, heating flooring, roofing and landscaping. As an addition is a complex job, and relying on a general contractor is necessary for the smooth operation and completion of this project.

A design-build contractor is another option and is a mix between an architect and a general contractor.  This option makes evolving the project during progression a bit easier. Make sure that if you choose to hire a design-build contractor that they get the overall vision, as they will be overseeing all aspects of the project.

Furthermore, make sure to consider all the areas of your life which may be affected by this job. There may be damage done to your lawn or landscaping of your property, especially if your home addition consists of adding to the foundation. Take into consideration dust that will accumulate during the renovation project, as all construction projects produce a significant amount of dust.

Also, make sure to think about project costs ballooning, and set aside some additional budget money for any problems that may arise. Also, with any project delays are always possible so bear this in mind when you begin your home addition!

If you want to learn more about home additions and other such projects, here are more articles on our blog:

Get 3 renovation quotes for your home addition project can help you get quotes for. By submitting your home addition project to us, we’ll put you in contact with top-rated contractors. Fill in the form on the homepage (it only takes a few minutes), and you will get estimates from trusted professionals.

Dial 1-844 828-1588 to speak with one of our customer service representatives


Looking for something else? Search here!



You have a project? let us help you.

Fill out this form to receive quotes from 3 certified contractors
Optional: It seems the postal code is missing. Your postal code helps us refer local contractors.

By submitting your project, you agree to our Terms of Use


You tell us about your project


We put you in contact with 3 certified contractors within 48 hours


You compare the different quotes and you save time and money

Number of projects submitted since 2014
Number of contractors in our network
Average time for an answer
One hour
*During business hours

Toronto - Calgary - Edmonton - Montreal - Ottawa - Vancouver - Halifax - Winnipeg - Windsor

© 2019


Follow us:


Partner sites: