Property Tax Reassessment After Buying an Apartment Building

Often, yes. In many states a sale brings the building's assessed value close to the price you paid, so the property tax on the seller's T-12 is not the tax you will pay. California and Florida reset value by law after a change in ownership, while Texas and Georgia value property at market every year, so underwrite taxes on your purchase price, not on the seller's bill.

Property tax is usually one of the largest operating expenses of an apartment building, and it is the expense first-time sponsors most often underestimate. This guide explains why a sale changes the bill, how four states handle it, and how to put the new number in your pro forma. Rules are as of October 2026, and local practice varies by county.

Why does buying a building change its property tax?

Property tax is roughly assessed value times the local tax rate. The assessed value is set by a county assessor or appraisal district, and in many places it trails the market until something resets it. A sale is the most common reset, because it tells the assessor exactly what a buyer paid.

That is why the T-12 can mislead. A seller who has owned a building for ten years may be paying tax on a value far below today's price. When you buy, the assessor may revalue it at or near your price for the next tax year. The expense line jumps, net operating income (NOI) falls and so does the value you can support. See how to read a rent roll and T-12 for the other lines to recheck.

How do California, Florida, Texas and Georgia handle it?

Each state has its own system. The table summarizes four of them from official sources.

State	What happens after a sale	Ongoing limit	Source
California	Proposition 13 requires the assessor to reassess the property to current fair market value as of the date ownership changed. A supplemental assessment covers the rest of the fiscal year.	Base year value increases are generally limited to 2% a year. The basic tax rate is 1% plus voter-approved debt.	BOE FAQ, BOE Publication 29
Florida	Property is assessed at just value as of January 1 of the year after a change of ownership or control. A change of control includes a cumulative transfer of more than 50% of the entity that owns it.	Yearly increases are capped at 10% for levies other than school district levies. Buildings with 10 or more units fall under section 193.1555; 5 to 9 units under section 193.1554.	Fla. Stat. 193.1555, 193.1554
Texas	Appraisal districts appraise most property at market value as of January 1 each year. A sale is not a legal trigger, but it is evidence of market value.	A temporary 20% "circuit breaker" cap applies to non-homestead real property appraised at $5 million or less (the 2024 threshold, adjusted for inflation). It starts the tax year after the owner acquires the property, and the Comptroller's guide says it expires December 31, 2026.	Texas Comptroller guide
Georgia	Property is assessed at 40% of fair market value, defined as what a knowledgeable buyer would pay and a willing seller would accept in an arm's length sale.	No general cap for apartment buildings in the official summary.	Georgia DOR

Two lessons come out of the table. First, in California and Florida, a sale is a legal reset, not just evidence. Second, in Texas and Georgia, there is no reset rule because value is meant to track the market every year, and a fresh arm's length sale is exactly the kind of evidence the definition describes.

How do you estimate taxes after the sale?

Use this simple formula, then check it with the county:

New tax = expected assessed value x assessment ratio (if any) x tax rate, minus exemptions.

Get the tax rate (often called the millage rate) from the county or city, not from the seller's bill alone, because rates can change each year and a building can sit in several taxing districts.

Made-up example. A sponsor buys a 60-unit building for $6,000,000 in a state that assesses at full market value. The seller's T-12 shows $72,000 of property tax. The combined local tax rate is 2.0% of value. All numbers are made up.

Scenario	Assessed value	Tax at 2.0%	Increase over T-12
Seller's current bill	$3,600,000	$72,000	$0
Assessed at 85% of price	$5,100,000	$102,000	$30,000
Assessed at 95% of price	$5,700,000	$114,000	$42,000
Assessed at 100% of price	$6,000,000	$120,000	$48,000

At 95% of price, NOI drops by $42,000 a year compared with the seller's numbers. At a 6% cap rate, that is $42,000 / 0.06 = $700,000 of value. That is why this one line can change what you should pay. In a state that uses an assessment ratio, such as Georgia's 40%, apply the ratio before the tax rate.

When does the new bill arrive?

Timing depends on the state, and it matters for your cash flow plan:

California issues supplemental assessments soon after the change in ownership, so a higher bill can arrive in the first year.
Florida resets value as of January 1 after the change, so the higher bill follows the next assessment cycle.
Texas values property as of January 1 each year, and tax bills generally go out starting in October, per the Comptroller's calendar.

At closing, taxes for the year are usually prorated between buyer and seller. Your lender will often require a tax escrow, so the higher bill also raises your monthly payment to the lender. Build the full, reassessed amount into year one unless you have a solid reason not to.

Can you appeal the new value?

Every state has an appeal or protest process. Georgia publishes a uniform appeal form, and Texas holds appraisal review board protests in the late spring and summer, according to the Comptroller's guide. An appeal can help if the value is set above what the building is worth, but do not underwrite a win. Treat any reduction as upside, not as the plan.

What do investors want to see?

Investors who have been through a few deals will check this line first. Show them:

The seller's current tax and your projected tax, side by side.
The assumed assessed value and why (for example, 95% of price).
The tax rate and where it came from.
A sensitivity line at full purchase price.
How the tax change moves break-even occupancy and the debt coverage the lender will test.

This is part of honest syndication financial projections. For the cap rate math, see what is a good cap rate for apartments.

How DoorRaise fits in

DoorRaise helps sponsors raise equity for apartment buildings with 5+ units from their friends and followers under Rule 506(b) or 506(c). It does not underwrite your deal or give tax advice: your tax assumption is yours, and your own CPA or tax consultant should check it. DoorRaise handles the raise: it prepares the standard offering documents, forms the LLC, files Form D and state notices, and verifies accredited investors for 506(c). Investors fund by wire into escrow at Enterprise Bank & Trust, an FDIC-insured bank. Fees are $1,500 to set up (non-refundable), $5,000 at closing (only if the deal closes) and $3,500 a year, with no percentage of the raise.

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FAQ

Will my taxes always go up after I buy?

Not always. If the seller's assessed value is already near your price, the change may be small. In some markets values fall. But you should not assume the seller's bill carries over.

Does buying the LLC instead of the building avoid reassessment?

Not necessarily. Florida counts a cumulative transfer of more than 50% of the owning entity as a change of control, and California has its own rules for transfers of entity interests. Ask a tax professional before relying on any structure.

Should I use the purchase price or the appraisal?

Start with the purchase price, because it is the clearest evidence of value. If your lender's appraisal differs, show both.

Can I protest every year?

In most states you can contest the value each year within the deadline. Keep records of income and expenses, because assessors often weigh them.

Do tax rates change too?

Yes. Rates are set by local taxing units and can change each year. Check the current rate with the county.

Next step: read multifamily underwriting basics to see where the tax line fits in the full model.

Sources

This article is general information, not legal, tax or investment advice. Talk to a tax professional about your deal. DoorRaise is not a law firm, broker-dealer, investment adviser or funding portal.