Short answerList every system the inspector says is near the end of its typical life, note its age, and put a planning cost on it. Sort the list by year: now, one to two years, and three to five years. Divide the total by sixty months to see what to set aside, and adjust after you get real quotes.
Planning costs to start from
| Item | Planning estimate | Source |
|---|---|---|
| GFCI or AFCI protection | $120 to $400 per location | W |
| Electrical panel replacement, 100 to 150 amp | $1,400 to $2,400 | W |
| Aluminum wiring connector repair, whole house | $2,000 to $8,000 | P |
| Water heater replacement, 40 gallon tank | $1,490 to $1,860 | W |
| Furnace replacement | $3,800 to $7,500 | W |
| Furnace and air conditioner together | $8,500 to $14,500 | W |
| Roof replacement, asphalt shingle | About $5,600 to $19,400 in Indiana, averaging about $7,400 | P |
| Grading and gutter correction | $500 to $5,000 grading; $1,200 to $4,500 seamless gutters | W |
| Basement interior drain tile and sump system | $3,000 to $7,000 | P |
| Radon mitigation system | $800 to $2,000 | P |
| Sewer line replacement, open trench | $80 to $180 per foot | P |
| Septic tank pumping | $250 to $500 | P |
| Well pump replacement | $1,200 to $3,000 | P |
W means Wardmark Property Operations pricing dated June to September 2026. P means published Indiana cost estimates gathered November 2026 (This Old House, AskDoss, Indiana radon cost guides, Summers Plumbing Heating and Cooling, NeedSeptic, AJ Long Electric). Local contractors may price differently.
A sample layout
| When | Item | Planning cost |
|---|---|---|
| Now | GFCI outlets, handrail, gutter extensions | A few hundred dollars |
| 1 to 2 years | Water heater | $1,490 to $1,860 |
| 3 to 5 years | Furnace | $3,800 to $7,500 |
Add it to your monthly budget: monthly cost calculator.
Frequently asked questions
How long do furnaces and water heaters last?
It varies with type and maintenance. Use the inspector's notes and the unit's age, and plan replacement before failure.
Should I negotiate items in my five year budget?
Usually only failing items. Aging but working systems are typically priced in.
Keep reading
Looking at a house and not sure what you are getting into?
Ask for a free Before You Offer review. Send me the listing. I look over the photos, the seller's disclosure, and recent sales, then flag likely condition issues and planning cost ranges before you write an offer.
Request a Before You Offer reviewOr call or text (812) 525-5489, or email john@yourpropertynegotiator.com.
The Before You Offer review is a REALTOR® and contractor review of the listing, not a home inspection. It is for buyers who are not already working with an agent. If you have an agent, please bring these questions to your agent.
Sources
- This Old House, Cost of a Roof Replacement in Indiana, May 2026
- AskDoss, Basement Waterproofing Cost in Indiana, 2026
- Radon Ready Guide, Indiana Radon Mitigation, 2026
- Summers Plumbing Heating and Cooling, Indiana sewer and well pump pricing, 2026
- NeedSeptic, Septic Tank Pumping Cost in Indiana, 2026
- AJ Long Electric, aluminum wiring remediation pricing, 2026
- Wardmark Property Operations pricing, June to September 2026
Written by John Long, REALTOR®, 1 Percent Lists Indiana Real Estate. Working contractor who has priced hundreds of home inspection repair requests. Former labor relations negotiator for a major manufacturer and U.S. Coast Guard veteran.
John Long, REALTOR® · 1 Percent Lists Indiana Real Estate · (812) 525-5489 · yourpropertynegotiator.com
This page is general information, not a substitute for a professional home inspection, and not legal, tax, insurance, or lending advice. Ask a real estate attorney about contracts and disclosure, a CPA about taxes, your lender about loan rules, and a licensed inspector or tradesperson about your house. Nothing here guarantees a sale price, net proceeds, repair cost, payment, timeline, appraisal, inspection result, or loan approval. Cost figures are planning estimates, not bids. I own Wardmark Property Operations LLC, a contracting company. You are always free to use any contractor you choose.