Home Improvement Costs

The following costs are intended as ballpark estimates for repairs and/or improvements to a typical three bedroom home. Our experience has shown that actual contractor quotations can vary by as much as 300%. Naturally, the quality of workmanship and materials will influence costs. The complexity of the job, accessibility and even economic conditions can also alter actual costs.


Install conventional asphalt shingles over existing shingles$2.00 – $4.00 per sq. ft.
Strip and reshingle with convention asphalt shingles$2.75 – $5.50 per sq.ft.
Strip and reshingle with premium quality asphalt shingles$5.00 – $10.00 per sq. ft.
Strip and re-roof with cedar shingles$9.00 – $18.00 per sq. ft.
Strip and replace built-up tar and gravel roof$10.00 – $20.00 per sq. ft. (min. $1,000.00)
Strip and replace single-ply membrane$10.00 – $20.00 per sq. ft. (min. $1,000.00)
Reflash typical skylight or chimney$500.00 – $1,000.000
Rebuild typical chimney above roof line$150.00 – $300.00 per lin. ft. (min. $1,000.00)
Rebuild typical single flue chimney above roof line$200.00 – $400.00 per lin. ft. (min. $1,000.00)


Install galvanized or aluminum gutters and downspouts$5.00 – $10.00 per lin. ft. (min. $500.00)
Install aluminium soffits and fascia$8.00 – $16.00 per lin. ft.
Install aluminium or vinyl siding$6.00 – $12.00 per sq. ft.
Repoint exterior wall (soft mortar)$3.00 – $6.00 per sq. ft. (min. $500.00)
Repoint exterior wall (hard mortar)$5.00 – $10.00 per sq. ft. (min $500.00)
Parge foundation walls$3.00 – $6.00 per sq. ft.
Dampproof foundation walls and install weeping tile$150.00 – $300.00 per lin. ft. (min. $3,000.00)
Install a deck$25.00 – $50.00 per sq. ft. (min. $1,000.00)
Resurface existing asphalt driveway$2.00 – $4.00 per sq. ft.
Install interlocking brick driveway$8.00 – $16.00 per sq. ft.
Rebuild exterior basement stairwell$5,000.00 and up
Build detached garage$70.00 – $140.00 per sq. ft.
Build retaining wall (wood)$20.00 – $40.00 per sq. ft.
Build retaining wall (concrete)$30.00 – $60.00 per sq. ft. (min. $500.00)
Painting (trim only)$2,000.00 – $4,000.00 and up
Painting (trim and wall surfaces)$5,000.00 and up


Underpin one corner of house$5,000.00 and up
Underpin or add foundations$300.00 and up per lin. ft. (min. $3,000.00)
Lower basement floor by underpining and/or bench footings$50.00 – $300.00 per lin. ft. (min. $5,000.00)
Replace deteriorating sill beam with concrete$60.00 and up per lin. ft. (min. $2,000.00)
Install basement support post with proper foundation$800.00 – $1,600.00
Perform chemical treatment for termites$2,000.00 and up
Repair minor crack in poured concrete foundation$400.00 – $800.00


Upgrade electrical service to 100 amps (including new pannel)$1,200.00 – $3,000.00
Upgrade electrical service to 100 amps (if suitably sized panel already exists)$800.00 – $1,600.00
Upgrade electrical service to 200 amps$1,700.00 – $3,500.00
Install new circuit break panel$700.00 – $1,400.00
Replace circuit breaker (20 amp or less)$100.00 – $200.00
Add 120 volt circuit (microwave, freezer, etc.)$150.00 – $300.00
Add 240 volt circuit (dryer, stove, etc.)$300.00 – $600.00
Add conventional receptacle$200.00 – $400.00
Replace conventional receptacle with ground fault circuit receptacle$70.00 – $140.00
Replace conventional receptacle with aluminium compatible type (CO/ALR) (assuming several are required)$60.00 – $120.00 each
Upgrade entire house with aluminium compatible receptacles, connectors, etc.$1,000.00 – $2,000.00
Rewire electrical outlet with reversed polarity (assuming electrician already out there)$5.00 – $10.00 each
Replace know & tube wiring with conventional wiring (per room)$1,000.00 – $2,000.00


Install mid-efficiency forced-air furnace$2,500.00 – $5,000.00
Install high-efficiency forced-air furnace$3,500.00 – $7,000.00
Install humidifier$300.00 – $600.00
Install electronic air filter$800.00 – $1,600.00
Install mid-efficiency boiler$3,500.00 – $7,000.00
Install high-efficiency boiler$6,000.00 – $120,000.00
Install circulating pump$400.00 – $600.00
Install chimney liner for gas appliance$500.00 – $1,000.00
Install chimney liner for oil appliance$700.00 – $1,800.00
Install programmable thermostat$200.00 – $400.00
Replace indoor oil tank$1,200.00 – $2,500.00
Remove oil tank from basement$600.00 and up
Remove abandoned underground oil tank$10,000.00 and up
Replace radiator valve$300.00 – $600.00
Add electric baseboard heater$250.00 – $500.00
Convert from hot water heating to forced-air (bungalow)$10,000.00 – $20,000.00
Convert from hot water heating to forced-air (two storey)$15,000.00 – $30,000.00
Clean ductwork$300.00 – $600.00

Cooling/Heat Pumps

Add central air conditioning on existing forced-air system$3,000.00 and up
Add heat pump to forced-air system$4,000.00 – $8,000.00
Replace heat pump or air conditioning condenser$1,200.00 – $2,500.00
Install independent air conditioning system$10,000.00 – $20,000.00
Install ductless air conditioning system$3,000.00 – $7,000.00


Insulate open attic to modern standards$0.80 – $1.60 per sq. ft.
Blow insulation into flat roof, cathedral ceiling or wall cavity$2.00 – $4.00 per sq. ft.
Improve attic ventilation$30.00 – $60.00 per vent


Replace galvanized piping with copper (two storey with one bathroom)$2,500.00 – $5,000.00
Replace water line to house$2,00.00 and up
Replace toilet$500.00 and up
Replace basin, including faucets$750.00 and up
Replace bathtub, including ceramic tile and facuets$2,500.00 and up
Install whirlpool bath, including faucets$3,500.00 and up
Retile bathtub enclosure$1,000.00 – $2,000.00
Replace leaking shower stall pan$1,000.00 – $2,000.00
Rebuild tile shower stall$2,500.00 – $5,000.00
Replace laundry tubs$400.00 – $800.00
Remodel four-piece bathroom completely$6,000.00 – $50,000.00
Connect waste plumbing system to municipal sewers$5,000.00 and up
Install submersible pump$1,000.00 and up
Install suction or jet pump$700.00 and up
Install modest basement bathroom$6,000.00 and up


Add drywall over plaster$4.00 – $8.00 per sq. ft.
Sand and refinish hardwood floors$2.00 – $4.00 per sq. ft.
Install replacement windows$40.00 – $120.00 per sq. ft.
Install storm window$200.00 – $400.00
Install masonry fireplace (if flue already roughed-in)$3,000.00 and up
Install zero-clearance fireplace (including chimney)$3,500.00 and up
Install glass doors on fireplace$300.00 and up


These estimates aren’t meant to deter you from purchasing, or selling, a home that needs a bit of TLC, but rather to help you make an informed decision when it comes to your property. If you want to learn more about your home and enjoyed these tips, order a copy of the Home Reference Book, or start following us on Twitter, or like us on Facebook. Click here to download a PDF version of this article.

Illustration of the Day

Our inspectors look for thousands of different conditions in homes. These images provide a glimpse into a home inspector’s head. You can also expect to find them embedded in your inspection report to make understanding your property a little easier. After all, a picture is worth a thousand words!
Carson Dunlop - Home Inspection Illustration of the Day

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