Cost Estimates for Common Home Repairs
SOURCE: 1995-2000 Freddie Mac.

Build addition
Enclose porch
Drywall ceiling over plaster 

$70 to 120 per square foot
$5,500 to 15,000
$1.50 to 2.00 per square foot

Convert to legal rental unit

  $30,000 to 50,000

Remodel bathroom
Add half bathroom
Add full bathroom

$7,000 to 12,000
$3,500 to 5,000
$7,000 to 12,000

Increase service to 200 amps
Run separate electrical lines
Install connectors on outlets
(of aluminum wired homes)

$700 to 1,200
$150 to 300
$15 to 20 per connection/
$2,000 to 3,000 (whole house)

Regrade lawn
New gutters and downspouts 

$500 to 1,500
$2.50 to 3.50 per linear foot

Build masonry fireplace
Install prefabricated fireplace
Reline chimney w/ terra cotta

$3,300 to 4,800
$1,800 to 2,300
$2,000

Sand and finish wood floors Install ceramic tile floor 
Install vinyl tile floor 
Install wall-to-wall carpet 

$1.50 to 3.30 per square foot
$11 to 22 per square foot
$2.64 to 5.34 per square foot
$3.38 to 6.61 per square foot

Build single car garage 
Build double car garage

$6,000 to 9,500
$8,000 to 12,000

Replace warm air furnace
Replace electric heat pump
Replace central A/C (electric)
Replace central A/C (gas)
Install humidifier
Install electrostatic air cleaner
Replace hot water boiler

$1,500 to 3,800
$2,200 to 3,600
$1,500 to 3,000
$2,600 to 3,500
$300 to 550
$500 to 750
$2,500 to 3,500

Insulate attic / basement
Install attic ventilation

$.75 to 1.20 per square foot
$250 to 450

Remodel kitchen

$8,000 and up

Hot water heater 
Install new well 
Install new septic system  
Install sump pump
Install French drain and sump pump

$400 to 650
$3,000 to 5,000
$3,000 to 5,000
$400 to 500
$2,000 to 3,500

Asphalt / fiberglass shingles- 
Install over existing shingles 
Remove existing shingles and install new

$1 to 1.20 per square foot

$1.30 to 1.75 per square foot

Install storm windows
Replace existing window

$60 to 100 each
$250 to 500 or more each