Connecticut vs Texas Property Tax on an $850K Home: The $4,950/Year Gap — and How the SALT Cap and Homestead Exemption Change the Math

The $850K house that started this comparison

A 111-year-old Connecticut colonial just listed for under $850,000 — a certified wildlife habitat on a lush parcel, built in 1915, the kind of property that makes you think about how long American homeowners have been paying property tax on land like this. Which is longer than you'd guess: property tax predates the income tax by more than a century. Even George Washington's Mount Vernon and Alexander Hamilton's Manhattan home — estates that would be worth hundreds of millions today, according to Realtor.com's recent look at Founding Father real estate — were subject to local levies in their day. Property tax is, quite literally, America's oldest recurring homeownership cost, and 250 years later it's still the one line item on your bill that most people don't fully understand.

So let's use that $850,000 Connecticut colonial as a real worked example, and put it next to a comparably priced new build in a fast-growing Texas master-planned community — the kind of development real estate developer Randall Kendrick (recently in headlines for his engagement to Yolanda Hadid) is building at Sandow Lakes on the site of a former industrial ghost town. Same purchase price. Very different tax math.

Nominal rate vs. effective rate: where the confusion starts

Here's the calculation homeowners almost never see spelled out, and it's the reason two $850,000 homes in different states can carry a $4,950/year gap in carrying costs.

Connecticut taxes property using a mill rate applied to assessed value, and state law requires towns to assess at 70% of fair market value — not 100%. So for our $850,000 colonial:

• Assessed value = $850,000 × 0.70 = $595,000
• A representative Litchfield County-area mill rate of 30.55 mills produces: $595,000 × 30.55 ÷ 1,000 = $18,177/year
• Effective rate on full market value = $18,177 ÷ $850,000 = 2.14%

That 30.55 "nominal" mill rate sounds moderate. The 2.14% effective rate on what the house is actually worth is what tells you the real story.

Texas assesses at 100% of market value with no statewide assessment ratio discount, but new construction in places like Sandow Lakes typically layers a Municipal Utility District (MUD) rate on top of school, county, and city rates to fund the roads and utilities that make a master-planned community possible in the first place:

• School district: ~1.05%
• County: ~0.30%
• MUD (infrastructure bonds): ~0.23%
• City/emergency services: ~0.10%
• Total nominal = effective rate: 1.68%
• Tax on $850,000 = $14,280/year before exemptions

Texas also offers a $100,000 homestead exemption against the school district's taxable value for owner-occupied primary residences. Apply it: the school portion drops from $8,925 to $7,875, saving $1,050/year, bringing the total to $13,230/year.

The gap: $18,177 − $13,230 = $4,947/year — call it $4,950. Over a 30-year mortgage, undiscounted, that's roughly $148,000 in cumulative carrying cost difference on otherwise identical purchase prices.

Component	Connecticut colonial ($850K)	Texas new build ($850K)
Assessment basis	70% of market value	100% of market value
Nominal rate	30.55 mills	1.68%
Effective rate	2.14%	1.68% (1.56% after homestead)
Annual tax	$18,177	$14,280 ($13,230 with homestead)
Homestead exemption available	No statewide equivalent	Yes, $100,000 off school value

This is the kind of side-by-side Tavirex runs automatically for any two addresses — so you don't have to reconstruct assessment ratios and mill-rate breakdowns from scratch every time you're weighing a move or a refinance.

Reading the comps: how you'd challenge that Connecticut assessment

Now flip the question. Say you already own that 111-year-old colonial and the town's grand list has it assessed as if it were worth the full $850,000 asking price — but the certified wildlife habitat lot, while beautiful, is unusual enough that it doesn't attract the same buyer pool as a standard subdivision lot. This is exactly the kind of comparable sales analysis assessors use, and it's learnable.

You'd pull three to five recent sales of similarly aged colonials (built 1900–1930) within the same town, adjust for square footage, lot size, condition, and any unique features like the habitat certification, and see where the adjusted values land. If those comps cluster around $780,000 rather than $850,000, you've identified a $70,000 over-assessment — and in Connecticut, because assessed value is 70% of market value, that $70,000 error only shows up as a $49,000 swing in assessed value ($850,000 × 0.70 = $595,000 vs. $780,000 × 0.70 = $546,000). Multiply by the 30.55 mill rate:

• Tax savings = $49,000 × 30.55 ÷ 1,000 = $1,497/year

You can run this same comp-adjustment exercise for your own address at Tavirex rather than building a spreadsheet from county sales records by hand.

What that $1,497/year is actually worth over time

A single year's savings understates the case. If you plan to stay in the home another 10 years, the appeal is worth the present value of that annual savings stream, not just one year's number. Using a 4% discount rate:

Annuity factor = (1 − 1.04⁻¹⁰) ÷ 0.04 = (1 − 0.6756) ÷ 0.04 ≈ 8.11

NPV of the appeal = $1,497 × 8.11 ≈ $12,140

That's the real economic value of filing the appeal — not $1,497, but roughly $12,000 in today's dollars over a decade of ownership. It's the same order of magnitude you'd see on a $50,000 assessment correction at a 2.5% effective rate ($1,250/year, ~$12,500 over 10 years), which is the benchmark case Tavirex uses across most mid-Atlantic and New England markets.

Deadlines: this only works if you file on time

Connecticut's appeal window is unforgiving. Grand list assessments are set as of October 1, and applications to the local Board of Assessment Appeals are statutorily due by February 20 of the following year (C.G.S. §12-111). Miss it, and you wait for the next annual cycle — or the town's next revaluation, which in Connecticut happens every five years.

Texas moves on a different calendar: protests are due May 15, or 30 days after your Notice of Appraised Value is mailed, whichever is later, with an informal review followed by an Appraisal Review Board hearing if needed. If you're in a Texas MUD community like Sandow Lakes, it's worth knowing the district's bond schedule too — MUD rates typically run highest in the early build-out years and decline as more rooftops share the debt burden, which is a factor new-construction buyers rarely price in. For the mechanics of building a Texas protest packet, see how Dallas County homeowners cut assessments using comparable sales and how Harris County's $70K assessment gaps get corrected.

The SALT deduction wrinkle changes the comparison again

Connecticut's higher effective rate stings less at tax time than it used to. With the SALT deduction cap now raised to $40,000 for many filers, a household paying $18,177 in Connecticut property tax can deduct a meaningfully larger share of that bill federally than they could under the old $10,000 cap — a shift covered in detail in New Jersey's millage breakdown and SALT cap analysis. Texas homeowners, with no state income tax to stack against the cap, generally have less SALT benefit to capture in the first place — so the after-tax gap between the two states narrows somewhat, even though the pre-deduction gap stays at roughly $4,950/year.

Exemptions worth checking before you appeal anything

Texas's $100,000 school homestead exemption isn't the only credit on the table. Seniors, veterans, and disabled homeowners in both states can often stack additional exemptions — Connecticut towns offer local-option elderly and veteran credits that don't show up automatically on your bill; you have to apply. If you're weighing similar exemption gaps elsewhere, the patterns in unclaimed homestead, senior, and veteran exemptions across Texas, Florida, and Kansas are a useful checklist regardless of which state you're in.

The bigger picture, 250 years in

The Institute on Taxation and Economic Policy's recent case for a tax code that "lives up to our ideals" makes a fair point that applies just as well at the property-tax level as the federal one: a system built on accurate, current, evenly applied valuations is the fairness baseline everyone should be able to expect — not a special favor you have to fight for. Most homeowners aren't being cheated by a rigged system; they're being under-served by an opaque one. The colonial listed at $850,000 and the new Sandow Lakes build at $850,000 aren't taxed unfairly relative to each other because someone's getting away with something — they're taxed differently because two states made different structural choices about assessment ratios, exemptions, and what infrastructure debt gets baked into your bill. Understanding that structure is what lets you check your own number against it.

If you're weighing a move, evaluating a purchase in a new master-planned community, or just suspect your existing assessment doesn't reflect what your home would actually sell for, run your specific address and purchase price through Tavirex. You'll see the nominal-versus-effective breakdown, the comparable-sales gap if one exists, and the deadline that applies to you — before it passes.

Sources

• The Extraordinary Real Estate of the Founding Fathers Would Be Worth Hundreds of Millions Today — Realtor.com News
• 111-Year-Old Connecticut Colonial With Its Own Certified Wildlife Habitat Lists for Under $850K — Realtor.com News
• America at 250: It’s Time for a Tax Code That Lives Up to Our Ideals — Institute on Taxation and Economic Policy
• Yolanda Hadid’s Fiancé Is Building a Huge Master-Planned Community on Site of Industrial Ghost Town in Texas — Realtor.com News
• We Have a New Second Home on Substack — Realtor.com News