Exterior doors are simply measured and estimated based upon the count, so to estimate your exterior doors you simply need to count the # of doors you need to replace in the property.
On a typical rehab project you will likely replace the front entry door, a garage entry door & a patio door. Each single entry door will likely take around 2 to 3 hours to remove and replace. Exterior patio door may take 3 to 6 hours.
The most obvious factor that influences door pricing is the type of door material being installed. Steel or Fiberglass entry doors are the cheapest ($150 to $300), whereas custom wood doors can be $500 to $2,000 each.
Single doors are obviously cheaper than double, french doors. Custom door sizes will also be a premium to in-stock door materials.
If you are changing the size of the door rough-opening this will require additional work for framing, siding, & painting.
Often times after removing an existing door you may find that the wood framing may be damaged from water, moisture & wood rot, which could result in additional cost to repair the framing and trim.
Door hardware prices can vary from as little as $25 to as much as $250 per door if you are installing electrified door hardware.
You have 2 different options for contracting the exterior door work and handling the exterior door materials:
The first option passes-on all material responsibility to the Contractor so they are responsible for purchasing and installing the exterior door materials.
The second option is to have the Contractor provide the rough materials (shims, screws & misc fasteners)and you (the house flipper) purchase the exterior door materials separately.
By taking responsibility of the finish materials, you have more control and flexibility with the materials and finishes that are installed on your project. However, this requires much more time commitment and coordination to ensure the doors are delivered on-time when the Contractor needs them.
Here is an example of how to write a Scope of Work that insures your Deck Contractor provides an all-inclusive bid.
All Exterior Door work (including door materials) is to be Contractor Purchased, Contractor Installed.
