How much does a House Extension Cost?

We are often asked – How much will my Home Extension Cost?’ And should I extend out or build up, or do both!?  What will that cost???

This is so very difficult to answer as every home and every house extension and home renovation is unique.

However, there are a few simple ways in which you can put together a rough cost.

Consider the following questions as they will be key factors in calculating your Home Extension and Renovation Costs:

  • How many square metres are you renovating? Be realistic about how much it costs per square metre. The cost per square metre can vary depending on a number of factors and is impossible to quote as a hard and fast amount. For example, it can be influenced by the next two points.
  • How many wet areas are there? e.g. Kitchen, laundry, bathrooms. These areas will cost more to renovate than a bedroom which had minimal fittings and fixtures.
  • What quality of fixtures and fittings will you choose? Budget, mid-range, premium? The better the quality the more it will cost. However, budget fittings are not always a wise investment so a little more spent now, can be money saved in the future.

Do you want a cosmetic home renovation or something more substantial?

If you are simply repainting and replacing curtains and appliances the costs can be relatively easy to calculate when there is no structural component involved. You can do this yourself with a small amount of market research and by getting a tradesperson such as a Registered Painter to provide a Quote for you. Make sure that you check that they are qualified to do the work before engaging them.

Are there structural changes? Do you need a Registered Builder?

If you are looking at undertaking a House Extension or major Home Renovation, it is likely that the structural changes will require a registered Builder to undertake the work. If so, you will require the services of an established Perth Home Renovation Builder with a track record in building quality Home Extensions and Renovations.

An experienced Renovation Builder will be able to provide you with an accurate Fixed Price Quote too. You can then take this to the bank if you need to get finance. Banks are more favourable towards projects by registered builders than those that homeowners are proposing to complete as an owner-builder (this is viewed as a risk).

Consider what structural components your home improvement project may include:

  • A home extension at the rear with Open Plan Living and Alfresco?
  • Adding a second story on top with additional bedrooms?
  • Replacing existing windows and doors? e.g. Bi-fold doors and stackable doors leading from the Open Plan Living area to the Alfresco area are very popular renovation choices.
  • Knocking walls out and opening up closed spaces?
  • How many additional square metres and space will be you be adding to your home?

House Extension Costs: What a ground floor home extension really costs

A Ground Floor Home Extension is a great idea if you want to add Open Plan Living such as a new Kitchen, Living and Dining area and modernising your dated home.

Stunning open plan living in this Nedlands House Extension

As a ballpark figure, we estimate that adding Open Plan Living to the rear of your home will start at around $160k.

A Home Extension starting at this price typically includes a new modern Kitchen with Dining and spacious Living Areas leading out to an Alfresco area.

The costs of a Double Storey Addition

Double Storey additions are a great way to add space and more rooms to your home, without losing any of your backyard space. The top storey is ideal for adding on more children’s bedrooms and another bathroom, and/or a master bedroom with ensuite. Some modifications will also be required downstairs to allow for the location of the new stairs.

With 30 years of experience in building double storey additions, we estimate that the cost of double storey addition starts at around $200-220k.

Calculating your Home Extension and Renovation Costs

When you design with Amerex, we ensure that we design within the scope of your budget. We provide you with guidance and our experience in building home improvement projects to ensure that you can afford to build the design that you have your heart set on.

If you already have a design, we are able to provide you with an accurate Fixed Price Quote to build your Home Extension/Renovation project.

Perhaps you are not ready to renovate yet, but are just curious about how much your Home Improvement project will cost? If so, click here to try using this fun Renovation Cost Calculator. This allows you to enter the rooms you want to adjust your project using postcode, rooms that you would like to renovate, the number of square metres and the quality of finishes you will select.