Estimated Remodeling and Repair Costs
What do a variety of common remodeling jobs actually cost? From Freddie Mac, here are helpful numbers.
 |  |  | ||
| Kitchens | Roofing | Floors |
| Additions | Costs |
| Build addition | $70 to 120 per square foot |
| Enclose porch | $5,500 to 15,000 |
| Drywall ceiling over plaster | $1.50 to 2.00 per square foot |
| Basement | Costs |
| Convert basement to legal rental unit | $30,000 to 50,000 |
| Bathroom | Costs |
| Remodel bathroom | $7,000 to 12,000 |
| Add half bathroom | $3,500 to 5,000 |
| Add full bathroom | $7,000 to 12,000 |
| Electrical Service | Costs |
| Increase service to 200 amps | $700 to 1,200 |
| Run separate electrical lines | $150 to 300 |
| Install connectors on outlets (of aluminum wired homes) | $15 to 20 per connection/ $2,000 to 3,000 (whole house) |
| Exterior | Costs |
| Regrade lawn | $500 to 1,500 |
| New gutters and downspouts | $2.50 to 3.50 per linear foot |
| Fireplaces | Costs |
| Build masonry fireplace | $3,300 to 4,800 |
| Install prefabricated fireplace | $1,800 to 2,300 |
| Reline chimney with terra cotta | $2,000 |
| Floors | Costs |
| Sand and finish wood floors | $1.50 to 3.30 per square foot |
| Install ceramic tile floor | $11 to 22 per square foot |
| Install vinyl tile floor | $2.64 to 5.34 per square foot |
| Install wall-to-wall carpet | $3.38 to 6.61 per square foot |
| Garages | Costs |
| Build single car garage | $6,000 to 9,500 |
| Build double car garage | $8,000 to 12,000 |
| Heating and Air Conditioning | Costs |
| Replace warm air furnace | $1,500 to 3,800 |
| Replace electric heat pump | $2,200 to 3,600 |
| Replace central air conditioning system (electric) | $1,500 to 3,000 |
| Replace central air conditioning system (gas) | $2,600 to 3,500 |
| Install humidifier | $300 to 550 |
| Install electrostatic air cleaner | $500 to 750 |
| Replace hot water boiler | $2,500 to 3,500 |
| Install attic ventilation | $250 to 450 |
| Insulation | Costs |
| Insulate attic / basement | $.75 to 1.20 per square foot |
| Kitchen | Costs |
| Remodel kitchen | $8,000 and up |
| Plumbing | Costs |
| Hot water heater | |
| (40-gallon capacity) | $400 to 650 |
| (40-gallon capacity) | $300 to 550 |
| Install new well | $3,000 to 5,000 |
| Install new septic system | $3,000 to 5,000 |
| Install sump pump | $400 to 500 |
| Install French drain and sump pump | $2,000 to 3,500 |
| Roofs | Costs |
| Asphalt / fiberglass shingles- | |
| Install over existing shingles | $1 to 1.20 per square foot |
| Remove existing shingles and install news | $1.30 to 1.75 per square foot |
| Windows | Costs |
| Install storm windows | $60 to 100 each |
| Replace existing windows | $250 to 500 each |
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(c) 1995-2000 Freddie Mac. All rights reserved.
Reproduced with permission from Freddie Mac.
