Cross-state property tax topic explainers

Last reviewed: June 2026 · Coverage: Cross-state explainers covering 14 states (Texas, California, Illinois, New Jersey, New York, Florida, Massachusetts, Connecticut, Pennsylvania, Ohio, Georgia, North Carolina, Virginia, Michigan)

These explainers cover the cross-state mechanics of property tax appeals — the things that work the same way (or in instructively different ways) across multiple states. For state-specific procedures, deadlines, and exemptions, see the individual state cornerstones from the homepage.

Mechanics

• Property tax assessment math: ratios, millage, equalization — How fractional ratios (Illinois 33⅓%, Connecticut 70%, Ohio 35%, Georgia 40%), full-market ratios (Texas 100%, Massachusetts 100%, NJ 100%), and acquisition-value (California Prop 13) translate into the actual tax bill. Equalization factors and what they do.
• Reassessment cycles by state — Annual (Texas, Florida), 4-year (Illinois quadrennial, Cook triennial), 5-year (Connecticut), 6-year sexennial + 3-year triennial (Ohio), county-set in Pennsylvania, municipality-set in Massachusetts and New Jersey, acquisition-value in California, decennial-or-otherwise in New York.
• State assessment caps overview — Florida Save Our Homes (3%/CPI), Texas 10% homestead cap, California Prop 13 (acquisition + 2%/year), Illinois Senior Freeze, NY tax cap.
• Why a NYC property tax appeal often won’t lower your bill — New York City caps Class 1 assessed value at 6% a year and 20% over five years (RPTL §1805), so most homes are assessed below market and a market-value grievance can’t move the bill. The three cases where an appeal does work — uncapped new construction or renovation, physical-record errors, and an effective market value that overshoots — plus the forward-looking benefit of trimming the cap’s target.
• Why your property taxes rise when commercial values fall — How a fixed levy divided by a shrinking commercial base shifts the burden onto homeowners. The Cook County case study ($1.9B pushed onto homeowners, 2021–2023), the office-value collapse, classification systems, levy caps, and the appeal that protects your share.
• Disaster-damaged home? The property tax break you have to claim — Storm, flood, or wildfire damage can cut your property tax through a separate remedy from the annual appeal — with its own form and its own deadline — but almost never automatically. The three shapes it takes (Texas §11.35 temporary exemption, California §170 reassessment, Florida §197.319 refund), the deadlines that trap people (105 days / 12 months / March 1), and why it’s a free, self-serve claim no contingency firm will chase for you.
• Your remodel raised your taxes more than your home’s value — Property tax is owed on market value, not construction cost — and most remodels return well under 100% of cost at resale. Why a permit-triggered reassessment can overstate an improvement’s contributory value, the two distinct appeals (the new construction’s own value vs. a whole-property decline), and proving the gap with paired sales. California §70 and Texas §23.23 specifics.
• Allegheny County reassessment court order: who wins, who pays more — The August 2026 court mandate ends a 14-year base-year gap — but Allegheny County's 49.3% CLR means most homes in appreciating neighborhoods will see higher bills, not lower ones. How to run the over-assessment test and when the 2028 appeal window opens.
• Texas’s 20% cap on rentals and second homes ends December 31 — The circuit breaker limit on non-homestead appraisals expires with tax year 2026 and no extension passed. How to size the 2027 jump from the two values on your 2026 notice, what to gather before January 1, and what a protest firm can and cannot do about it.

Evidence

• Who has to prove your assessment is wrong? Burden of proof by state — In most states the assessor’s value is “presumed correct” and the burden is on you — but it’s a rebuttable starting point, not a verdict. California (§167, owner-occupied homes), Texas (the appraisal district always carries it), and Indiana (any increase over 5%) flip the burden onto the assessor; Florida makes the appraiser earn the presumption first. Which side your state is on tells you how much evidence to bring.
• Finding and documenting comparable sales — Recency, similarity, documentation standards, adjustment math, the 3-5 comp benchmark, common rejection patterns.
• Recent purchase price as property tax appeal evidence — The single strongest evidence at every appeal venue, when it works, when it doesn't (CA acquisition-value distinction).
• Property record errors as appeal basis — The easiest property tax appeal: factual record corrections. Texas §25.25(c) 5-year lookback, square-footage errors, demolished features still listed, denied exemptions.

Process

• Do property tax appeals actually work? What the government data shows — Appeal firms tout high success rates, but almost none are government figures. What official boards actually publish: NYC audited both stages (~10% administrative vs. 93% judicial review), Iowa ~35%, most states (including Texas) publish no official rate at all. How to read your real odds.
• Property tax appeal deadlines by state — No national date: relative windows that start when your notice is mailed (Texas May 15, Florida 25 days after TRIM, Georgia 45 days, Illinois ~30 days) vs. fixed calendar deadlines (Ohio March 31, Connecticut Feb 20, New Jersey April 1, New York Grievance Day). Miss it and the assessment stands all year.
• Cook County has two appeal windows: only one sets your final value — The deadline on your Assessor notice is the first window, not the last. The Board of Review window, which sets the final valuation, opens 27–69 days later on dates not set in advance. 2026 township calendar, pre-registration, and what a missed window costs.
• What it costs to appeal your property taxes, by state — The first level of appeal is free in 10 of 14 states and under $50 in most of the rest (Florida $15–$50, New York SCAR $30, New Jersey $5–$150). Real fees only appear at escalation — far less than the 30–50% a contingency service keeps of your win.
• Do you have to keep paying property taxes while you appeal? — Yes, in all 14 states — filing an appeal never pauses your bill. What varies is how you pay: under protest (Illinois, Connecticut, Pennsylvania, North Carolina), a partial “undisputed” payment (Texas, Ohio, Florida), or staying current or losing the appeal outright (New Jersey, Georgia, Massachusetts). Win, and you get it back with interest.
• What property tax appeal hearings actually look like — BAR, ARB, AAB, CBT, BOR, BOE, BAA, ATB hearing structure. What to expect, what to bring, how decisions get made.
• Your property tax appeal was denied: what comes next — The post-denial escalation map across nine states: binding arbitration (Texas), free or low-cost state tax tribunals (Illinois PTAB, Ohio BTA, New Jersey Tax Court), and court (Florida, California, Pennsylvania). Deadlines run 30–60 days from the decision; the guide covers the break-even math on whether to pursue.
• Got a ‘homeowner tax review’ letter? Real notice vs. paid solicitation — That official-looking “tax review” mailer is usually a private company charging for what your county does free. The three kinds (county notice, legal paid solicitation, outright scam), the 30-second test, and the California/Texas disclosure laws (§ 17533.6, § 41.0051).
• DIY vs. hire: decision matrix — When to DIY, when to hire a service company, when to hire an attorney. Cost economics by state.
• Property tax service companies: honest comparison — Ownwell, O'Connor, AppealDesk, others. 25-60% contingency landscape. What to ask before signing.
• Contingency fee math: how services calculate "savings" — The four math methods (year-over-year, vs. noticed value, multi-year, projected). Same successful appeal can produce a $0 fee or a $1,440 fee depending on which method the contract uses.
• The Year-Two Problem: why appeal wins often don’t hold — Three states (NJ, NY, PA) have statutory carryforward that locks an appeal win for 2–3 years or longer. Six states (CA, TX, OH, IL, MN, MA) treat appeals as year-specific. The map matters for contingency-fee math and for whether you budget to refile next year.
• Property tax appeal services in New York — NYC Tax Commission, Long Island grievance (Nassau ARC + Suffolk town BARs), upstate SCAR. Three distinct regimes with different fee structures, deadlines (March 31 / May 19, 2026), and post-denial routes.
• The $40K SALT cap and what your appeal is really worth — The 2026 SALT-deduction cap (OBBBA, $10K→$40K through 2029) makes property taxes deductible again for many itemizers — which quietly lowers the after-tax value of a winning appeal and reframes a contingency service’s percentage of “savings.” Who’s affected, the bracket math, and how to run your own number.
• The escrow shock: why a higher assessment raises your payment twice — A reassessment hits your mortgage escrow account twice — a permanent bump for the higher tax plus a one-year surcharge to repay the shortage — so your monthly payment can jump by roughly double the tax increase. Why a winning appeal may not lower it for up to a year under RESPA (12 CFR § 1024.17), and how to force the escrow re-analysis that turns a win into a lower payment.

Exemptions

• Senior and disability exemption deep-dive — STAR (NY), Senior Freeze (IL), Floating Homestead (GA), Circuit Breaker (CT), 100% Disabled Veteran exemptions across all 11 states.
• Exemption vs. appeal: two levers on one bill — An exemption is a free, status-based cut to your taxable base; an appeal contests the assessor’s value. Why contingency services pitch only the lever they can charge for — plus the 2026 exemption wave: Florida’s HJR 1F homestead increase, Ohio’s HB 479 credit, and Georgia’s new 45-day filing window.

Edited by The Editorial Team