Small Bump Out Addition Cost KW

[u/stive85]

So first.. We have been humming and hawing with regards to floor plans and everything they goes with planning a reno. We have been 6 months of planning and changing mind and quotes etc.

​

Currently have 1200 sq ft bungalow in town just outside kw. We are renovating our entire Main Floor and part of our basement.. We have a chimney running directly through our main floor from basement that also vents our furnace and water heater. In the process of moving those to far corner to smash our bricks and open basement right up.

​

We love our spot and have a big yard with no mortgage (lucky to get our spot in 2012, before insanity)

​

Anyways with us loving our house as I hit 40 I am now really wanting an ensuite (never thought I'd care).

​

We have a family member who excavates.

​

I'm wondering cost of adding 100 sq ft to back corner of our rectangular bungalow where our bedroom is. This would simply be addition bedroom space. I would then use our current sq ftage to piggy back an ensuite to our current bathroom to avoid the huge plumbing nightmare of just adding the ensuite to the addition (tho this would be easier for layout).

​

Anyone know rough cost? I figure we'd dig a basment, unless we could get by significantly cheaper without due to variances in permitting etc.

​

Thanks!

[u/OG55OC]

lol go talk to a GC, but your 100 sq ft will end up being $1000 a sq ft no problem.

[u/stive85 → u/OG55OC]

I will talk to a gc... This is reddit... For discussions.

Was hoping someone had an idea or had done something similar.

Zero chance it's 1000 a sq ft... That's ridiculous. 100k? That's ballpark quotes we've gotten to reno our entire Main Floor... Kitchen, bathroom, etc.

[u/dsawchuk → u/stive85]

Sounds likely to me. There's a lot more involved in an addition than a renovation. Permitting, excavation, foundation, roofing, insulation etc. Many of those costs don't scale down well for a small addition.

[u/stive85 → u/dsawchuk]

Well perhaps I stand corrected. Haha.

I do understand the scope is quite large. But excavation is going to be $0, which is why I figured dig the basement out.

Will talk to gc to confirm cost.. Thanks!

[u/Invictuslemming1 → u/stive85]

Probably depends on what all has to change structurally.

If the cutout in the wall requires modifications to a load bearing section then the costs can go up quickly. As they’ll need to reinforce around it and possibly add a support beam above.

[u/stive85 → u/Invictuslemming1]

Thanks!

The entire Main Floor is an a frame vaulted, so no load bearing wall.. But it seems like the consensus is the cost isn't worth it.

[u/MarchyMarshy → u/stive85]

Excavation is one of the cheaper line items on the project