Tax Considerations
Avoid Paying More Than You Should
Planning helps you preserve your homes equity and tax liability
The Tax Side of Pre-Sale Renovations Most Connecticut Sellers Miss
Most sellers think about renovation ROI purely in resale terms — what a project adds to the offer. There's a second, quieter benefit almost nobody plans around: what those same projects can do to your tax bill when you sell.
How capital improvements lower your taxable gain
When you sell your home, the IRS taxes you on your gain — the difference between what you sell it for and your cost basis (roughly, what you paid plus what you've legitimately put into it). The more you can add to your basis, the smaller your taxable gain.
That's where renovations come in. Not every project counts, though — the IRS draws a real line between a capital improvement (adds to basis) and a repair (doesn't):
| Counts toward basis | Doesn't count |
|---|---|
| New roof, siding, or windows | Patching a roof leak |
| Kitchen or bath remodel | Repainting a room |
| New flooring throughout | Fixing a running toilet |
| HVAC system replacement | Replacing a cracked windowpane |
| Room addition or finished basement | Cleaning gutters |
The general rule: if it adds value, extends the home's life, or adapts it to new use, it's an improvement. If it just keeps things working as they already were, it's a repair. Keep your invoices and proposals — that's the paperwork that backs up your basis if the IRS ever asks.
The $250,000 / $500,000 exclusion most sellers already have
Under IRC Section 121, most home sellers can exclude up to $250,000 of gain (single filers) or $500,000 (married filing jointly) from federal tax, as long as you owned and lived in the home for at least 2 of the 5 years before the sale. These thresholds haven't changed for 2026, and for most sellers, they wipe out the entire taxable gain — meaning most Connecticut sellers owe nothing at all.
So why does basis still matter? Two reasons:
- Connecticut has seen substantial home value appreciation over the past two decades, and a seller who's owned a home for 20–30 years can have a gain that runs close to, or past, the exclusion limit — especially single filers.
- Any gain above the exclusion is taxed at long-term capital gains rates (0%, 15%, or 20%, plus a possible 3.8% net investment income tax for higher earners) — so every dollar of tracked basis above the exclusion is real money.
A simple example: A single seller bought their home years ago for $250,000 and sells today for $560,000.
That $65,000 in documented improvements is what drops this seller from a $310,000 gain — $60,000 over the single-filer exclusion — to $245,000, which falls entirely under the $250,000 exclusion. Without the paperwork, that seller could owe capital gains tax on $60,000 they didn't need to.
Where energy-efficiency incentives stand right now
This is worth knowing before you assume last year's rules still apply: the federal Energy Efficient Home Improvement Credit (25C) and Residential Clean Energy Credit (25D) — the credits that used to cover things like heat pumps, insulation, and solar — expired on December 31, 2025, under the One Big Beautiful Bill Act. A heat pump or insulation project completed in 2026 no longer qualifies for either federal credit.
The good news: Connecticut's own utility-funded program, Energize CT, is separate from those federal credits and is still fully active in 2026 — including per-ton heat pump rebates and a 75% rebate on insulation costs for most homeowners (100% for income-eligible households). It's a state and utility-level incentive, not a federal tax credit, so it wasn't affected by the federal expiration.
What this means if you're prepping to sell
- Keep every invoice and proposal. If we complete work on your home, you'll have a documented scope and cost for each project — exactly what a CPA needs to support an adjusted basis.
- Know which projects actually qualify. A repaint won't move your basis; a new roof or kitchen remodel will.
- Don't assume the old energy tax credit rules still apply. If you're weighing an efficiency upgrade before selling, price it against Energize CT's current rebates, not the expired federal credit.
- Talk to a tax professional before you file — this article is a starting point for the conversation, not a substitute for one.
How this fits with our model
Every project we complete comes with a clear, itemized scope of work — the exact kind of documentation a CPA wants to see when calculating adjusted basis at tax time. And since we cover 100% of the cost upfront and get repaid from the sale proceeds at closing, you're not choosing between prepping the home right and keeping cash on hand.
Curious what your own project mix could look like?
Get a free walkthrough →Sources: IRS Publication 523 and IRC Section 121; One Big Beautiful Bill Act (P.L. 119-21, July 4, 2025) and related IRS guidance on Sections 25C/25D; Energize Connecticut program materials. General information only — not tax advice.