No figures, just the drivers
What affects the price
Nobody can price this work from a web page, and a number given before an inspection is a guess. What you can do is understand why one proposal comes in higher than another.
The ten things that move the number
| Factor | Why it matters |
|---|---|
| Size | Liner is priced by area and drains by length. A long, narrow house has more wall per square foot than a square one. |
| Headroom and access | A crawl space you can kneel in goes faster than one where the crew lies flat. A small or awkward door slows everything. |
| How much water | Humidity alone needs sealing and drying. Liquid water adds trench, basin, pump and discharge. |
| What is already down there | Old insulation, debris, torn plastic and mold all have to be dealt with before new work starts. |
| Materials | Thicker liner, a larger dehumidifier, a cast-iron pump or a second backup pump each add cost and each last longer. |
| Electrical work | Pumps and dehumidifiers need outlets. Running a new circuit is an electrician's charge on top. |
| Digging | Depth, soil, tree roots and how close a machine can get decide the cost of any outside work. |
| The discharge route | A short pipe to a slope is simple. A long buried run across a lawn and under a path is not. |
| Putting things back | Drywall, flooring, planting and paving are sometimes included and often left out. |
| Warranty and service | A longer written warranty or yearly service visits are built into the price. |
Comparing two proposals
Line them up item by item. If one includes a pump and the other does not, they are not prices for the same job. Ask each company to explain what the other has that theirs lacks. The answers are often more useful than the totals.
Look at quantities. Feet of drain, square feet of liner, number of vents sealed. A lower total with smaller quantities may simply be less work.
Check what is excluded. Mold treatment, electrical work, permits and reinstatement are the usual gaps.
Paying for it
A deposit to book the job is normal. Paying the full amount before work starts is not. A schedule that releases money as stages finish keeps both sides honest, with the last part held until you have walked the job.
If the company offers financing, read the rate and the term as you would for any loan. A monthly figure tells you little about the total.
Price questions
Why will nobody give a price by phone?
Because the cost turns on things only a visit reveals: headroom, standing water, the state of the wood. A firm phone price would have to be padded for the worst case.
Should I take the low bid?
Only if it covers the same scope and the same materials. Compare what is in each proposal before comparing what each one costs.
Can the work be done in stages?
Often. Outside fixes and drainage can come first, with the liner and dehumidifier later. Ask which order avoids paying for the same labor twice.