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Question DetailsAsked on 4/25/2014

how much should it cost to build a washroom

cost of adding a laundry room to my house

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9 Answers


There is NO way to answer this question intelligently , as there are NO Measurements given ,NO desired sizes , NO distance to a water or drain supply are known , NO mention of how the walls are to erected and NO mention of finishes .Is this going to be a basement or the 3rd floor ?

Further more , we have NO IDEA as to how far away the electrical panel is located , how difficult it will be to route said electrical lines to the area , NO idea as to what will be used for lighting , No idea as too How far from the street or driveway the work area is located etc etc etc ...................????

Will the electrical panel handle the additional Load requirements ?

We could tell you $5000.00 to $15,000.00 but we have no idea as to wheter those figures are accurate or NOT because there are TOO MANY UNKNOWN'S Involved in your question.

Can you supply US with more information to attempt to try and answer your QUERY with more certainty ?

Answered 6 years ago by BentheBuilder


You can respond back with more info using the Answer This Question button right below your question.

In addition to what Ben said, also provide how far it is roughly to nearest sewer pipe penetration into the slab or floor drain, if this is going to be on a concrete slab.

For most purposes, I think Ben was probably on the mark with his $5-15,000 - even though I don't think he really meant that as a true ballpark estimate.

Answered 6 years ago by LCD


Hopefully this will be helpful than the other answers, which chose to be a bit more critical. A washroom isn't a full bathroom w/ tub/shower, etc. They are much easier to do and don't cost anywhere near as much.

ASSUMING that connecting the intended area to a nearby 3 or 4" drain line isn't too difficult you are probably looking at $2500-5000. You'll be at the lower end if you GC it yourself, and the higher end if you hire someone to do the full thing.

Here are some costs:

- toilet -$250 (toto drake)

- vanity $300

- vanity faucet $100

- mirror $100

- vanity light $100

- ceiling lights (cans) $100

- wire $250

- pex $250 (including fittings, pipe etc

- pvc $200

- drywall $600 labor

- drywall $100 materials

- tile $1-5 sq foot

- you can get VERY nice tile from places like the tile shop or travertine group imports, for a LOT less than you think.

- tile install $3-7 per sq foot.

- thinset, grout $200

- heated floor $200 materials (can be embedded in thinset or self-leveling cement

- framing TBD but probably about $350-450 inc materials

- Primer $25

- Paint $30

- Painting $250

I've done quite a bit of renovations - all of them full guts to rebuild. Our master bath costs about $6000-7000 to do, with high end natural stone tile and heated floor.

This should at least give you SOME idea as to what you are in for. NICE tile is well worth it. It will only add a bit to the overall cost but add a LOT to the look and value.

good luck!


Answered 6 years ago by Jefferson


I think Jefferson lost his way part way through - went from the laundry room in the question, to do-it-yourself materials costs (without labor, note) for bathrooms.

I think the main reason Ben and I were reluctant to get detailed was a laundry room has a major drain connection to make which can get quite expensive if you have to tear up concrete and/or finished flooring to install it, and the electrical cost can get way out of hand if you are adding an electric dryer where you currently have gas (or no laundry facilities at all) and your current system does not have the capacity without being upgraded.

Answered 6 years ago by LCD


I AGREE with YOU Completely LCD .

Jeffersons price's are completely OFF Base .

I have seen BATHROOMS COSTING , $20,000.00 to $32,000.00 and that did NOT include having to tap into the main sewer line or Make major Electrical changes .

That is the problem one runs into when trying to estimate something , SIGHT UNSEEN ,

or without any specifications or measurements , trouble will exist or make it'self known around every corner !

Answered 6 years ago by BentheBuilder


Would be interesting to know where Jefferson operates - I presume some very low cost area like the deep south.

I know there can be tremendous variances in construction costs around the country - a 4000 - 5000SF colonial mansion can cost around $250,000 to build in some parts of the country like the rural deep south and Appalachia, $500,000 in parts of the midwest, $1,000,000 in Connecticut/Boston and Denver areas, and $2,000,000 in the West LA and Silicon Valley areas of California, so clearly any pricing info we give on this site has to be taken as a starting point for budgeting only. That is why for any substantial job it is recommended that you get 3 responsive bids (not counting the way out of range or non-responsive ones) - and that should be three from people you would feel comfortable working with after the jobsite visit, not just any 3 off the street.

Answered 6 years ago by LCD


Oooops I missed the laundry room bit. We just did one of those too. LG combo washer dryer (1 unit with both) for $1000. Runs on standard 15 amp line. And of course needs hot/cold supplies and a 1.5 or 2" drain line. Most washers need a 2" drain but this unit works great with only a 1.5" drain.

So ignore the heated floor, tile, vanity etc - but the other costs are still pretty applicable. We are a bit North of Philly - to give you an idea. We are most decided NOT in some area of the deep South where things are super cheap.

Nevertheless, good labor does NOT need to be expensive. Good licensed electricians and plumbers will often work for side gigs at $30-40 per hour (that works out to $60k - 80k per year - which is plenty, more if they don't report it.

This need not be some huge expensive thing, and hopefully your plumbing tie-ins are relatively convenient.

Answered 6 years ago by Jefferson


Yes this is a bathroom and not a laundry room. I but I'd like you to see what CAN be done for a very reasonable cost - provided that you GC the job yourself. Travertine, Linear drain, etc. We live near Philly, in Bucks county. We did this in July-Aug 2012.

I tallied things up and all this ran $7000. A really nice glass door will add another $1500 when we get around to that.

But you are doing a LAUNDRY room, which is far less complex and costly, unless you have serious issues running the plumbing or electric. Unless it's on a slab this really shouldn't be all that bad - you can run the 2" drain line into the wall and down to your basement (if you have one) and tie-in there - or just tie-in wherever you can nearby. This isn't rocket science and don't let some contractor scare you into thinking that it is. We've done a LOT of renovations - all from full-gut onwards.

Do people pay $10k-30k for a bathroom? Sure they do. I don't. You CAN find VERY good and experienced licensed contractors who will put in a good day's work for about $250.

By the way - when we did Our new laundry room, we picked the LG combo washer dryer in part because it is ventless. Where we wanted it there was no practical way to vent a dryer outside. We couldn't be more happy - it is very efficient, super QUIET and does an incredible job.

Good luck to you! And sorry that I misread the original question and thought you wanted a "washroom" not a laundry room.

Answered 6 years ago by Jefferson


Thank you Jefferson - for some reason, I had the impression from your prior posts that you were a contractor who just charged on the low end for your work - NOW it all makes sense.

Absolutely, if you GC it yourself and only contract out maybe concrete, major structural rough carpentry, plumbing and electrical you can do a job for probably close to half what a GC will charge - and of course a total DIY job can be done for 1/3-1/4 the commercial cost in many cases.

And yes - I had the first intial take you did, that this was like an entry hall half bath "washroom" - until I saw the clarification about adding a "laundry room".

Answered 6 years ago by LCD

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