Adding a bathroom surrounded by my house? I would like to make a payment a bathroom (1/2 bathroom,...

I would like to make a payment a bathroom (1/2 bathroom, just the toilet and sink) to my house and be wondering if anyone knows he standard cost. I have some ancestors comming to give estimates slow next week but be looking for a general digit. Also if anyone has ever done it them selves ; how tough was it? How much did it cost you? Thanks.
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Answers:    powerfully im a superintendent for a general contractor, and if a complete room, (ie an insert to the existing structure), i would guess about 5,000$

.but overall, check for license, insurance, and no matter what they voice, get local building permit, i know alot of people that hold been burned by folks because of shody work.

dont impart money upfront, if you have to buy fabric, bo it yourself, and pay for labor as you budge..

... and ask for a schedule