You’ll spend $3,000 to $8,000 on the typical remodel. Anywhere from 40 to 65 percent of a bath upgrade cost comes from labor. However, doing any project yourself means no insurance and added fees if something goes wrong. Hire a professional for any work you’re not comfortable doing, such as the plumbing and electrical. Consider the pros and cons of DIY vs professional bathroom remodeling.
As a contractor I can tell you that most reputable contractors probably don't need your job, and if you make things too complicated or troublesome, they will move on to other jobs that don't throw up red flags. Much of what you ask for here is reasonable, but bringing a second contract into the equation can set of some alarms that you may be a difficult customer to work with or even a litigiously minded person who is likely to try and bring a lawsuit whether deserved or not. Anything you want covered should be in the original contract.
Everyone wants to save money, but when you start by questioning material costs or markups it can indicate that you may be under budgeting for the project, or will question every choice the contractor makes in the hopes of saving $100. Time is money and when you have a customer who may cause interruptions because they want to buy something themselves to avoid "markup" it can cause major delays. Many times a customer ends up getting the wrong material anyway. This again slows down a contractor that may already be too busy.
A DIY demo does still require some planning. For one, you'll need the right tools: likely a sledgehammer, a large crowbar, a pry bar, and an old claw hammer you don't mind ruining. Make sure you know what's behind the walls—especially electrical wiring and water pipes—before you start swinging. Finally, don't assume your demo won't cost anything. In addition to tools, you'll probably need to rent a dumpster or hire a hauling service to cart away debris.
As you might imagine, I once had to sue a contractor. He demanded payments up front during different stages of work replacing a roof and front porch on my house. When he wanted to cheap out and use inferior materials, i insisted he do the job to specifications I had provided to him in writing beforehand. He walked away from the job, half completed, and I had to hire someone else to finish it. I recovered most, but not all, of the money he had stolen.

Home improvement digital marketplace HomeAdvisor, which connects homeowners with service professionals, estimates a comprehensive bathroom remodel at $15,000 or more. A large master bath remodel in a luxury home can weigh in at over $50,000. The average homeowner can expect to pay $18,000 says HomeAdvisor for a complete master bath renovation which typically includes a separate tub, shower, double vanity and larger space for cabinets and fixtures.

Wall and Floor Tile: Ceramic, porcelain and natural stone are popular picks for floor tile in bathrooms. Materials will be the deciding factor here, but natural stone often costs more to install because it is difficult to cut and place. From natural stone and classic ceramic to glass and mosaic styles that mimic natural materials, wall tile options vary.

Installing a new bathtub is one of the more complicated and expensive projects involved in a bathroom remodel. Not only will you have to purchase the tub itself, you also need to install surrounds and have a plumber come by for the installation work. If you're just replacing the tub, and the surround can stay, your price will be lower than average. If you're having a customized surround built, expect to pay around $3,160.
A punitive approach to what could be unforseen and atypical delays may be a bad idea. I would suggest offering a bonus for the job being completed early rather than a penalty for it being delayed. If material is ordered, we can't make it arrive faster if something delays the shipment. We recently ordered a bathtub requested by a customer. It was promised by our supplier for a Wednesday delivery. Bad weather hit Texas and it just didn't leave the warehouse until the following Monday. It blew up our schedule for the project and it wasn't anyone's fault or mistake. If we have an employee critical to the project get sick or injured, we may not be able to get things done as originally scheduled. Jobs can get off schedule for a lot of reasons outside the contractor's control. Charging them for those things is likely to turn them away.
If you are just updating a bathroom, you will probably not need plumbing or electrical work. Since this article is referenced to a small bathroom, the costs here are way too high for labor unless you are in Manhattan. $9k for general labor is insane. A small bathroom should cost you $1-2k labor for reframing, concrete board, tile, toilet, vanity and accessories install. Texture and paint should be another $400-600 tops for a SMALL bathroom.

I’m in the middle of a small bathroom remodel. Shower only-no tub. I thought I was ready for this, but so many things have come up I didn’t count on. I paid $5000 for all supplies and in stock fixtures at Lowes–just basic stuff. I did have to order a shower kit because the builder thought it would save some labor time. It was high–$3200. The builder charges $50 an hour (includes him and his helper). He estimated his costs between 5 and 7 thousand. My house is 35 years old so he has had to do a lot of work to accommodate the new fixtures. I had an old lighted medicine cabinet so he had to rewire for the new lights. My vanity was too high so he had to move the electrical outlet. Because my attic above the shower had moisture in it, he had to vent the shower to the outside. He had to replace all the subflooring and a lot of the rotted insulation on the sides of the bathroom (leaky roof) . Anyway, it looks like my bathroom remodel is going to be around 10 or 11 thousand. I wish now I hadn’t ordered the shower kit with the fancy tile.
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