# How to estimate interior door installation by opening in Canada Plan an interior door installation estimate in Canada using measured quantities, visible scope boundaries and a Charlottetown, Prince Edward Island worked example with 6 CAD cost lines and a matching PDF. Canonical: https://quicklyestimates.com/en-ca/guides/how-to-estimate-door-installation/ Author: Estimates editorial team Published: 2026-09-25 Updated: 2026-09-25 Estimate interior door installation by opening, door type and included finishing work. Separate the door-unit allowance from installation, hardware, casing and painting so a customer can compare like-for-like scopes. Follow the Charlottetown, Prince Edward Island interior door installation example to check quantities and a C$1,850.00 illustrative subtotal before tax or markup. THE SHORT ANSWER Estimate interior door installation by opening, door type and included finishing work. Separate the door-unit allowance from installation, hardware, casing and painting so a customer can compare like-for-like scopes. This guide follows a fictional three prehung interior doors in Charlottetown, Prince Edward Island. The linked interior door installation PDF example (https://quicklyestimates.com/en-ca/samples/door-installation-estimate/) shows the scope and 6 separate costs in Canadian dollars. Treat it as a worked document, then use measurements, supplier quotes and labour inputs from your own project. 1. Identify the replacement type A slab-only replacement and a prehung unit involve different assumptions. This example uses prehung interior units. Record each opening, swing direction and selected style, then confirm dimensions before purchasing. 2. Check the existing opening The price assumes suitable existing openings. If correction or resizing is required, list it separately after inspection. A standard installation line should not imply that damaged framing or extensive wall repair is included. 3. Track hardware and casing Handles, hinges, casing and consumables can be overlooked when only the door price is considered. State which items arrive with the unit and which are supplied by the customer. Avoid charging a separate allowance for something already included in the purchased package. 4. Define the finish at handoff A fitted door may still need painting or adjacent wall touch-up. Explain exactly what is included in the quoted finish. Record whether disposal of old units and packaging is included so the final handoff is clear. Review the Canadian project address For the three prehung interior doors in Charlottetown, Prince Edward Island, the example uses the measured trade units shown in its PDF. Residential jobs may mix square feet, linear feet, counts and supplier units; keep each line’s measurement basis visible. Confirm site access, product selections and existing conditions in person. Check any trade or municipal requirements for the actual location, and record changes before issuing a final price. The figures are fictional CAD inputs, not a local price survey. Describe which products the customer supplies and which the contractor supplies. State how any site condition outside the visible scope will be assessed and priced. Do not copy an allowance from another city or assume a sample’s tax entry establishes the treatment for this client. Work through the interior door installation quantities The matching PDF lets the client check each extension of quantity and unit rate. For this example, two useful checks are: - Existing door-unit removal: 3 each × C$56.00 = C$168.00. - Prehung interior door allowance: 3 each × C$235.00 = C$705.00. Adding all 6 lines gives a C$1,850.00 illustrative subtotal. The PDF records 0% tax and C$1,850.00 as its total, before any markup. These are chosen sample inputs, not prices observed in Charlottetown, Prince Edward Island. The measurement basis matters as much as the rate: a material purchase allowance may be larger than the installed area, while a fixture count is not interchangeable with hours of labour. Check the scope before sending - Confirm sizes, swing directions and styles. - Verify slab-only versus prehung replacement. - Assign hardware and casing responsibility. - State painting and wall-repair exclusions. Outside the illustrated scope: No opening resizing, framing repair, exterior doors, specialty assemblies, painting or surrounding wall refinishing. Check the business and client names, property location, dates, quantities, unit rates and notes. Confirm tax, markup and any required approvals for the actual job. If selections or site conditions are unresolved, label the line as an allowance and explain how it will be updated. Common questions Does a door installation estimate include the door? Not always. Label a labour-only quote clearly, or list the door-unit material allowance separately as this sample does. Can I use one price for all interior doors? Only when the openings and scope are comparable. Different sizes, conditions, products and finishing requirements should be identified before grouping them. Open the itemized interior door installation example and its app-exported PDF (https://quicklyestimates.com/en-ca/samples/door-installation-estimate/) to see these decisions presented to a client. You can adapt the structure while replacing every fictional project input with your own. Create an estimate ↗ (https://quicklyestimates.com/en-ca/download/)See the PDF example (https://quicklyestimates.com/en-ca/samples/door-installation-estimate/) (https://quicklyestimates.com/en-ca/samples/door-installation-estimate/) Preview of the matching estimate PDF · View the matching example (https://quicklyestimates.com/en-ca/samples/door-installation-estimate/) Get the app: https://quicklyestimates.com/en-ca/download/ App Store (iPhone): https://apps.apple.com/app/id6740389403 Google Play (Android): https://play.google.com/store/apps/details?id=com.uzel.contractorplus