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Question DetailsAsked on 1/7/2017

What is cost to build 6×8 laundry room off kitchen?

We would have to knock out wall with window and reuse in back wall, maybe leuvor doors to seperate the 2 rooms and continue plumbing line from basement which would be directly underneath and of course electrical work.

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Depends on whether your house is wood-frame construction or concrete or brick walls, how far the floor is off the ground, what sort of foundation depth is needed (depends on soil conditions and frost penetration depth), where drain line/sewer line is and whether under concrete slab or not, roof overhang interference (headroom issues), and buried utility (pipe or wire) interferences, etc.

Following are links to a few similar questions with responses which might help, but to get a decent conceptual estimate for your particular situation your best bet would probably be to talk to an architect who designs residential remodels and additions, getting an initial conceptual estimate once you settle on configuration and dimensions.

You are pretty much certain (in almost all areas) to need an architect anyway to do plans and specs (including utility connections) to be able to get a building permit and for bidders to bid on, and for the successful bidder to build to.

I hate to throw out ballpark numbers not knowing at least some of the unknowns above - but you might get it for from $3000-5000 in the most ideal conditions and with low-end materials, probably more in the $5-10,000 range, and if bad interferences or such or fancy finishes could be more than that - I have seen about 8x12 laundry/mud rooms with stone flooring and such which cost over $20,000.

Couple of things you did not realize or did not mention - "knock out wall with window" - that exterior wall is at least somewhat load bearing, so not just a matter of "knocking it out". And if in an area with winters or real hot summers (or a lot of solar exposure on those walls) you will need to run HVAC into there too to prevent pipe and washer freezeup risks or house overheating from the outdoor heating. So a simple $3-5,000 rough-in and drywall and slap some paint on tiny addition can very quickly get into the $10,000 range.

I would also suggest, in addition to the architect, talk to your favorite realtor (one you bought it from maybe) about size and location and their effects on resale value - especially if planning on putting this addition long end out instead of crosswise across the back of the house, because that small a laundry room might actually detract from the resale value, especially if a long narrow stub-out from the house.

Also - two (OK - actually three) other thoughts -

1) knocking out a window from the kitchen would probably significantly detract from the kitchen value, most especially and dramatically so if that is now the only kitchen window.

2) taking a laundry room off the kitchen can easily cause moisture issues, so you should include some ventilation and/or HVAC connection it only a humidistt scavenger or "Robin Hood" type fan with the kitchen. Most especially if in a cooler area where the walls are cold, with a three-outside wall laundry room especially if frequently getting moist air from the kitchen cooking and dishwashing through a louvered door as well as its own normally higher moisutre, is an invitation to mildew/mold issues, so ventilation and exhausting moisture should be a priority.

3) take into consideration, in figuring costs and resale value and house functionality and such (and budget flexibility of course), whether since you are looking at putting in the cost to do an addition including water and sewer and heavy-duty electric, whether you might outghta go ahead and do a larger addition with an added bathroom as well, or maybe even bathroom and an additional bedroom. Since you will be doing foundation, utilities, roof etc - the incremental cost of increasing the functionality will be much smaller on a per-square foot basis, because it will just be adding on more of the same types of work that are already going to be needed. Ditto to whether you extend the basement out under it or not, if you already have a full basement, to make the basement extension a workshop or such - fairly cheap to do as long as you are already doing the extension. This sort of what-if is where a good architect really earns his/her keep - helping scope out alternatives with conceptual costing to show relative costs of small and more expansive additions or remodels.

Answered 3 years ago by LCD

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