Cost breakdown
This estimate converts a 4,000 sq ft footprint into roof area using a standard pitch multiplier, adds a moderate waste factor, then applies the installed cost range for Mod. Bitumen. It is a planning range, not a contractor bid, but it gives homeowners a fast baseline before comparing local quotes.
Mod. Bitumen installed roof system
Low, average, and high allowance
$26,611–$63,867
Tear-off, disposal, and site cleanup
Low, average, and high allowance
$4,400–$11,000
Pipe/chimney/skylight flashing (2×)
Low, average, and high allowance
$300–$900
What 4,000 Sq Ft Means on a Roof
A 4,000 sq ft footprint is about 40 roofing squares. That is the unit roofers actually quote in, order in, and pay disposal by.
A 4,000 sq ft home is a full cut-up roof: hip main body, multiple gable dormers, wing intersections, covered porches. Expect two distinct tear-off zones and a job that runs like two smaller roofs back to back.
Waste factor
12-15%, sometimes more. Intersections stack up on this footprint, and heavy architectural or designer shingles waste faster than the label number.
Tear-off and dumpster
One layer assumed. 40 squares means a 30-yard dumpster plus a swap, or two 20-yarders staged at separate zones with separate hauls.
Crew and days (membrane)
5 person crew, 4-6 days
Schedule reality
Permit two weeks in many jurisdictions, longer if a truss or engineer review gets triggered. Install is three to four shingle days, up to two weeks for tile. Inspection inside ten days of finishing. Order special materials first: lead time, not labor, usually sets the start date.
Planning checklist at this size
- Split the job into two tear-off zones with separate completion targets. One naked 40-square roof overnight is an unacceptable weather bet.
- Stage a boom truck or crane for at least two days. Hand-carrying material across wings burns more labor than the install itself.
- Walk every valley and sidewall with the foreman before the contract signs. On this footprint, flashing details outnumber field squares in the warranty file.
What changes the price?
Pitch and access
Steeper roofs require more safety setup, more labor time, and often more waste.
Tear-off layers
Old shingles, decking surprises, and disposal fees can move the final quote.
Valleys and penetrations
Chimneys, skylights, pipe boots, vents, and valleys add flashing detail and labor.
Material grade
Mod. Bitumen ranges widely by manufacturer, warranty, color, thickness, fasteners, and trim package.