Connecticut is an expensive state to hold real estate and a moderately expensive one to sell it. The gain on an investment property is taxed as ordinary income at up to 6.99%, the state and your town both collect a conveyance tax at closing, and the property tax on the same building runs roughly six times higher in Hartford than in Greenwich. A 1031 exchange defers the income tax on the gain, federal and Connecticut, when you reinvest the proceeds in like-kind property through a qualified intermediary. It does not defer the conveyance tax and it does not change the mill rate on your next building, so this guide covers what the exchange solves in Connecticut and what it leaves for you to underwrite.
Table of contents
- What Connecticut taxes when you sell investment property
- The conveyance tax a 1031 does not defer
- Connecticut conforms to Section 1031
- Mill rates: the underwriting trap in Connecticut replacement property
- The federal deadlines, applied to a Connecticut closing
- Selling the LLC instead of the building
- Where Connecticut exchanges happen
- Exchanging out of Connecticut, and into it
- Swap till you drop in a state with an estate tax
- Where Connecticut exchanges go wrong
- Start your Connecticut 1031 exchange
- Frequently asked questions
What Connecticut taxes when you sell investment property
Connecticut has no separate capital gains rate. The gain is added to the rest of your income and taxed on the same brackets as wages, topping out at 6.99% on Connecticut taxable income above $500,000 for single filers and $1,000,000 for joint filers. Nonresidents pay it too: gain on Connecticut real estate is Connecticut-source income, reported on Form CT-1040NR/PY. Unlike New York, Maryland, or California, Connecticut does not withhold from a nonresident seller at closing, so nothing is taken at the table, but the liability follows you home in April.
The same sale triggers the federal stack: long-term capital gains at 15% or 20% (the 20% bracket starts at $545,500 of taxable income for single filers and $613,700 for joint filers in 2026), the 3.8% net investment income tax, and 25% on the depreciation you've taken. Connecticut and federal together can take more than a third of the gain on a fully depreciated Fairfield County multifamily. Our capital gains vs. 1031 comparison runs that number for your deal, and the depreciation recapture calculator isolates the recapture piece, which is the part investors most often underestimate.
The conveyance tax a 1031 does not defer
An exchange defers tax on the gain. Connecticut's real estate conveyance tax is charged on the sale price, gain or no gain, and the seller pays it at closing on Form OP-236. Nothing about a 1031 changes that.
- State tax on nonresidential property: 1.25% of the sale price.
- State tax on residential property: 0.75% on the first $800,000, 1.25% on the portion from $800,000 to $2.5 million, and 2.25% on the portion above $2.5 million. That top tier is why a $4 million Greenwich rental house pays more conveyance tax than a $4 million office building.
- Municipal tax: 0.25% in most towns, and up to 0.5% in the targeted investment communities, a list that includes Bridgeport, Hartford, New Haven, Norwalk, Stamford, and Waterbury.
On a $3 million commercial sale in Stamford that is $37,500 to the state and $15,000 to the city: $52,500 before the proceeds reach your intermediary. Conveyance tax is a transaction cost of the sale, so it can be paid out of the closing without creating boot, but it shrinks the number you're reinvesting. Set your replacement-property target from the net, not the contract price. On the purchase side there's no buyer-paid conveyance tax in Connecticut; the seller of your replacement property pays it.
Connecticut conforms to Section 1031
Connecticut's income tax starts from federal adjusted gross income and makes no addback for gain deferred under Section 1031. If the gain is deferred on your federal return it's deferred on your CT-1040 or CT-1040NR/PY, with no separate state election and no annual tracking form of the kind California requires. Two things to know:
- Deferred is not forgiven. When you eventually sell without exchanging, Connecticut taxes the accumulated gain if you're a resident then, wherever the final property sits. The only permanent exit is holding until death, when your heirs take a stepped-up basis; more on that below.
- If the property is held in a partnership or multi-member LLC, Connecticut's pass-through entity tax, elective since tax year 2024, affects who reports the gain and when. Decide on the election with your CPA before the relinquished property closes, not after.
Mill rates: the underwriting trap in Connecticut replacement property
Connecticut assesses property at 70% of fair market value and each of its 169 towns sets its own mill rate, producing the widest spread in the Northeast. Greenwich sits near 11 mills, Stamford and Norwalk in the mid-20s, Bridgeport and New Haven around 40, and Hartford at nearly 69. At 70% assessment, a $2 million building carries roughly $16,000 a year in property tax in Greenwich and close to $97,000 in Hartford. That is an $80,000-a-year difference on the same purchase price, and it is the single biggest reason Connecticut replacement deals that look fine on a broker's setup fall apart in underwriting.
Two rules for any Connecticut replacement property you identify. First, pull the current mill rate from the town's tax collector, not the listing. Second, check when the town last revalued. Connecticut revalues on a five-year cycle, and a property bought the year before a revaluation can see its assessment, and its bill, reset within twelve months of your closing. The seller's tax history tells you what they paid, not what you'll pay.
The federal deadlines, applied to a Connecticut closing
The 45-day identification and 180-day exchange periods are federal and don't change in Connecticut. Our deadline tracker calendars both from your closing date and the 45-day identification validator checks your list against the three-property and 200% rules. What is specific to Connecticut is who's at the table. Connecticut requires an attorney to conduct real estate closings, so your closing attorney, not a title company, is who we coordinate with on the exchange agreement, the assignment of the contract to us, the notice to the buyer, and the OP-236 conveyance tax return. Tell your attorney it's an exchange before the purchase and sale agreement is drafted; the assignment and cooperation language belongs in the contract, not in an addendum signed at the table.
The rest of the federal rules apply as they do everywhere: the proceeds go from the closing attorney to us and never to you, the entity that sold must be the entity that buys, and you need to reinvest all net proceeds into replacement property of equal or greater value and debt or the shortfall is taxable boot. Our partial exchange calculator shows what a trade-down costs before you commit to one, and if you're running late on identification, read the last-minute identification guide before day 45, not after.
Selling the LLC instead of the building
Connecticut sellers sometimes ask whether selling the LLC that owns the property, rather than the property itself, avoids the conveyance tax. It doesn't, and for an exchanger it's worse than that. Connecticut's controlling interest transfer tax applies when more than 50% of an entity that holds Connecticut real property changes hands, at 1.11% of the property's fair market value, filed on Form AU-330. And Section 1031 excludes partnership interests by statute, so selling a membership interest in a multi-member LLC isn't an exchange of real property at all. The one exception is a single-member LLC that's disregarded for tax purposes, where a sale of 100% of the interest is treated as a sale of the underlying property. If your ownership is in an entity, we walk through the structure with you and your attorney before anything is signed. Along with using a disqualified person as intermediary, it's one of the most common ways a Connecticut exchange fails before it starts.
Where Connecticut exchanges happen
Fairfield County carries most of the state's exchange volume and is priced off New York. Stamford's Harbor Point and downtown are the deepest institutional multifamily market in the state; Greenwich is hedge-fund office and trophy residential, with the highest prices and one of the lowest mill rates in Connecticut; Norwalk's SoNo district is mid-priced mixed-use and multifamily; Bridgeport and Danbury are where value-add multifamily still trades at entry prices that work for smaller exchangers. Hartford is an insurance-company town with soft office demand and an active multifamily conversion market downtown, while West Hartford and Glastonbury hold the retail and residential premium. New Haven is Yale, Yale New Haven Health, and a downtown lab and life-science market that has drawn institutional capital. Along I-91 and I-95, industrial and last-mile distribution is the one asset class where Connecticut rents have grown steadily, and the shoreline towns and Litchfield County supply the 1-to-4 family and second-home rental inventory that many exchangers use as replacement property.
Exchanging out of Connecticut, and into it
Connecticut is mainly an origin state for exchange capital. The common move is out of Fairfield County or Hartford-area multifamily into Florida, Texas, or Tennessee, where there's no state income tax on the eventual sale, or into the Carolinas for growth. Two things to understand before you do it:
- Connecticut has no clawback, but residency decides the ending. Exchanging Connecticut property into Florida property is not a recognition event, and Connecticut does not track the deferred gain the way California does with Form FTB 3840. But if you are still a Connecticut resident when you eventually sell the Florida property, Connecticut taxes the whole gain, including the part that accrued in Connecticut. The no-tax-state benefit is only realized by residents of that state.
- Inbound capital is mostly New York. New York investors exchange into Connecticut multifamily to get out of rent stabilization and away from New York City's transfer and mansion taxes, and Fairfield County is the natural landing spot. If you're the New York seller, start with our New York 1031 guide for the nonresident withholding and transfer taxes on the sale side.
Our Massachusetts and Rhode Island guides cover the neighbors, and if you'd rather not manage property at all after the exchange, Delaware Statutory Trust interests qualify as replacement property and are a common landing spot for Connecticut sellers exiting a long-held building.
Swap till you drop in a state with an estate tax
Many long-term exchangers plan to hold their last replacement property until death, when the basis steps up to fair market value and the deferred gain disappears for income tax purposes. That works in Connecticut. What Connecticut adds is an estate tax, one of about a dozen states that still have one, and it is the only state with a gift tax. The Connecticut exemption has matched the federal exemption since 2023, which puts it at $15 million per person for 2026, with a flat 12% rate above that. For a Connecticut family whose exchanged portfolio has grown past the exemption, the planning question is estate tax, not capital gains, and the tools are different: entity structures, lifetime gifting (which Connecticut taxes), and in some cases a change of domicile before the last property is sold. Our swap-till-you-drop guide covers the federal side.
Where Connecticut exchanges go wrong
- Setting the reinvestment target from the gross sale price and coming up short after conveyance tax and closing costs reduce the net.
- Underwriting a replacement property on the seller's last tax bill in a town that revalues next year.
- Selling the membership interest to dodge the conveyance tax, then discovering it's a controlling interest transfer and not an exchange.
- Letting the closing attorney draft the purchase and sale agreement without exchange language, then trying to add an assignment at the table.
- Identifying only Connecticut replacement property because it's familiar, when the mill rate and the eventual-sale tax say the money should leave the state. Or the reverse: exchanging into Florida as a Connecticut resident and expecting the 6.99% to go away.
- The universal ones: taking receipt of the proceeds, missing the 45th day, or trading down into boot. If the exchange does fail, our tax-straddling guide explains how to push recognition into the following tax year.
Start your Connecticut 1031 exchange
Engage us before the relinquished property closes. We prepare the exchange agreement, assignment, and notice for your closing attorney, hold the proceeds in a segregated, bonded account under the 1031 Specialists Standard, calendar the 45- and 180-day deadlines, and coordinate the replacement closing anywhere in the country. Book a call to walk through a specific Connecticut deal, or call (631) 438-1031. If you've already found the replacement property and haven't sold yet, ask about a reverse exchange.
Frequently asked questions
Does Connecticut have a separate capital gains tax on real estate?
No. The gain is taxed as ordinary income at Connecticut's regular rates, up to 6.99%. A 1031 exchange defers it along with the federal tax.
Does a 1031 exchange defer the Connecticut conveyance tax?
No. The conveyance tax is charged on the sale price at closing and is paid whether or not you exchange. It can be paid from the closing proceeds without creating boot, but it reduces the amount you reinvest.
Is there nonresident withholding when I sell Connecticut property?
No. Connecticut doesn't withhold at closing. Nonresidents still owe Connecticut tax on the gain and file Form CT-1040NR/PY, unless the gain is deferred in an exchange.
If I exchange Connecticut property into Florida, do I escape Connecticut tax?
You defer it. If you're still a Connecticut resident when you sell the Florida property in a taxable sale, Connecticut taxes the full gain. If you've become a Florida resident by then, there's no state tax at all.
Can I sell my LLC instead of the property to avoid the conveyance tax?
Transferring a controlling interest in an entity that owns Connecticut real estate triggers a 1.11% controlling interest transfer tax, and a partnership or multi-member LLC interest doesn't qualify for 1031 treatment. Only a 100% interest in a disregarded single-member LLC is treated as the property itself.
Do I need a qualified intermediary for a Connecticut exchange?
Yes. The exchange is only valid if a qualified intermediary holds the proceeds between closings, and the intermediary can't be your attorney, agent, or a relative. Engage one before the sale closes.
This page is general information, not tax or legal advice. We act as a qualified intermediary and do not provide tax or legal advice. State and federal rules, rates, and thresholds change; confirm current figures with your tax advisor.
Connecticut 1031 resources and nearby states
Neighboring states
- 1031 exchange in New York — nonresident withholding, transfer and mansion taxes
- 1031 exchange in Massachusetts — 5% rate plus the 4% surtax on income over $1 million
- 1031 exchange in Rhode Island — nonresident withholding at closing
Where Connecticut sellers exchange to
- 1031 exchange in Florida — no state income tax
- 1031 exchange in Texas — no state income tax
- 1031 exchange in Tennessee — no state income tax
- 1031 exchange in North Carolina
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