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.
Interior bathroom demolition costs $1,000 to $2,300. Prices can go higher if you’re removing and moving walls to create a different footprint. For the experienced DIYer, this is a good place to save money by doing it yourself or assisting the contractor. However, demo can get expensive quickly if you take out a load bearing wall, cut electrical lines or break a water pipe. Avoid the risk by hiring a pro.
There are a wide range of costs associated with remodeling a bathroom, including size, the type of materials, its current condition, and the location. Homeonwers spend on average between $15,000 and $25,000 in their bathroom renovation. For example, the average cost of a 100 square foot master bathroom with tile walls and flooring, new fixtures, double vanity, and walk in shower with separate tub is around $20,000.

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I acted as general contractor and did all my own demo to remodel my 6x8 bathroom. I hired subs individually to do most of the work - an electrician, a plumber, a drywall guy and a tile guy. I painted the walls and the ceiling. I replaced everything except the cast iron tub. Materials and fixtures cost around $2000 and labor was about $3000. My subs had no problem with me supplying the materials, because I discussed their job scope in advance. This project took 6 months but I did have another full bath to use in the mean time.
The Home Depot is a great place to buy your bathroom essentials and remodeling materials. We also provide top-rated design and installation services for homeowners across America. Besides undergoing full background checks, our hand-selected remodeling experts are local, licensed and insured. The Home Depot also offers a great selection of flexible finance options.

Be brutally honest about your DIY skill level. Assess which projects to do yourself and which are better left to the pros. You could save yourself a ton of money in the long run if you don’t have to call someone in to fix a project you’ve messed up. The best way to find a good contractor — seek referrals from friends, family, neighbors, co-workers and others who have had remodeling work done.
As the home owner, I am providing about $8,000 in materials. This includes the cabinetry, fixtures, faucets, countertops, lighting, toilet, glass in-line shower door and tile. Received two quotes. One contractor wants $25,000 to demo the bathroom, convert the existing tub to a tiled walk-in shower, tile the floor, and install my materials. The other wants $27,000. Using the previously mentioned 60/40 labor to material rate, I would be paying more than double for labor...that's insane. Some contractor's need a reality check.
This estimate for a 2019 Typical Bathroom Remodel is derived from the unit cost method summarized in the American Institute of Architects Detailed Cost Estimating - Best Practices. This approach is used by professional designers, contractors, engineers and estimators and uses current wages, material costs, worker productivity benchmarks, supervisory overhead and markup rates.

We’ve had a number of contractors to our house for a number of items from roof tear off & redo, to gutters and corner boards, whole-house carpet replacement and a basement completion. We know the lingo and the big picture but - whether it’s the timing or the unknown - this has been the most frustrating process ever! If you find a nuts & bolts, studs to baseboards and crown-molding to carpet contractor you can trust, consider yourself one of the lucky 10 across the country. The rest of us are stuck in the wild-west and unfortunately left with an article that’s not even worth updating over the past 2+ years.
We own a kitchen and bath company. If you are going to do the work yourself, you will save money....if you act as the GC, that is great as long as you have the time to manage the project. If you are using a guy out of his truck, the job will be less expensive. BUT check their references and insurance. WE run a legitimate business and a showroom. We are not inexpensive but are not high priced. YOU MUST have realistic expectations of what things cost, both in material and labor costs. We pull permits also....all this costs money. We have 30 years in business. Do not expect a full demo of a bathroom to be $11,000 in CT. If someone gives you a price like that RUN, it is too good to be true. You are looking at 18,000 and up. Cheaper does not mean better. If you are buying all the materials at HD or Lowes, good luck. You will redo your space one more time before you move. Spend a little more on a good, experienced contractor now....in the end it will be worth it.

I agree with everything you said. I think the trick is to convey those concerns when discussing what work will be needed. Everyone will have concerns but if you come across as too needy or pushy they may think you will be a pain in the butt homeowner. I have seen this before where you have to come back 3 or 4 times for something not dealing with the work, but you are trying to be polite and helpful for business. Word of mouth is the best way to get more buisness, in my opinion.
I just renovated a 6X12 bathroom. Old cast iron tub removed. Removed and saved existing vanity and vanity top. Removed the toilet and replaced the existing rotten flooring and added on to the existing partially rotten floor joist. Removed the drywall and tile from around the old tub. After the new flooring was in I had to modify the existing plumbing to accommodate the new tub and shower surround. The hot and cold water lines had to be raised to fit the surround because the new tub is taller and the drains had to be installed and moved to fit the new tub. Drywall was finished and painted. New faucets,New tub,Tub Surround, and flooring materials were purchased by the home owner. Labor cost was 4,584.00 
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