What is a typical home extension cost?

Question Icon
Posted by: from Victoria
9/9/2014 at 7:08:17 PM


I'm in a small 2 bed + 1 bath house in Victoria (hillside area). Any idea how much to add around 800 feet more? Would be one-level, connected to main house. Likely 2 bed + 1 1/2 bath + tv room.

Land is completely flat, no real challenges from that perspective, with access from the front and back (laneway in back).


User Icon
Date/Time9/9/2014 at 9:37:00 PM


Does your house currently have a basement? If so there are 2 options you can choose from with adding a home addition:

1) Excavate and add in new foundation walls to the existing basement to tie into existing foundation and build your addition up from there. This is costly.

2) Use a a screw pile which is a much cheaper and faster way to add additions to homes. On the last home addition I did using them, we got 14psi when drilling the screw piles which converted to 18,000lbs per screw pile. Iif you spread them across and once your frame is set on them it is just like having a solid foundation. The company is called PRO-TECH. I have quoted a quick description directly from the company's website below:

"Home builders of all sizes rely on DRILLRITE SYSTEMS to provide foundation support. The DRS Helical Pier Foundation Systems are designed, tested, and proven for applications in expansive soils, high water tables, fill areas, and other areas where unstable soils require piling. The most common applications include the following:

- Grade Beams

- Retaining Walls

- Garage Slabs

- Footings

- Verandas

- Decks

- Sidewalks

- Support Posts

DRS have a variety of engineered custom pile caps that simply slide into the piers making them ready for construction.

Advantages of The DRILLRITE SYSTEMS custom piling solution when compared to conventional concrete piles are:

- Time(each pile is installed in under 3 minutes)

- No concrete curing time

- Budgeting with fixed costs and no surprises

- No tailings

- No sluffing

- No unsafe holes in the ground

- Environmentally friendly

- Vibration free

- Superior uplift/frost jacking performance

- No pump trucks

- Can be installed in any weather, any time 365 days a year

- Quality of pile and known loading capacity

DRS's Engineered Solutions provide the added assurance by closely monitoring each pier's mapping parameters to ensure that maximum loading capacities are achieved."

In summary, providing a cost on an average sq ft for a home addition is hard due to every job being different. The best thing to do is if you are serious about doing the addition is get a set of drawing done by an architect and have your engineering specs done to get a price.

I hope this helps.



Search the TrustedPros directory and discover the best contractors in your area.

Find your home service pro
Great renovations start with a great contractor.

Since 2004, TrustedPros has been helping homeowners find the right contractor for their home improvements and repairs.

Post Your Project

Within hours you'll be comparing offers from top-rated professionals. It's free to post and you're under no obligation to hire.

Trustedpros Inc. does not warrant the accuracy, completeness, safety, legality or usefulness of any Content, or Whether Content is Current and up-to-date, and TrustedPros Inc. Shall have no liability whatsoever with respect to your use or reliance upon any content or for content being removed or otherwise ceasing to be available. Please refer to the terms and conditions of use of this websites for more details.

Get Free Estimates

Post your project and compare offers from top-rated pros.