We use an estimate of 1/2 to 1% of the value of the house to give people an idea of what insurance will cost, but that's not a promise.
A lot of factors go into the quote you'll get:
1. Value of the Property
2. Amount of the Deductible (fixed $ amounts are usually higher than 1% or 2%, but look out!)
3. Other risk factors (some companies check your credit to decide your risk) and you might have a pool or live in certain zipcodes with higher losses.
4. Inflation protection
5. Straight insurance or replacement cost - are they going to pay you back at depreciated value minus deductible or at replacement cost? If your straight coverage is too low, will you be subject to co-insurance payment?
The point about deductibles cannot be overemphasized. If your roof is heavily damaged by wind or hail, how much will you be out of pocket? A 2% deductible policy may be cheap, but your $6,000 roof will take $2200 out of your pocket if your house is valued at $110k.