Washington DC property tax assessment: how it works and how to appeal

Last updated 2026-07-09

How does Washington DC calculate your property tax assessment?

DC taxes real property at 100% of estimated market value. No fractional ratio, no assessment percentage games. That standard is written into DC Code § 47-820, which directs the Office of Tax and Revenue (OTR) to assess each parcel "at the estimated market value" as of January 1 of the tax year. ^[1] If OTR thinks your rowhouse is worth $750,000, your assessed value is $750,000.

OTR uses mass appraisal. Appraisers don't walk through every home every year. They group similar properties into neighborhoods and run statistical models built on actual sales from the prior year, then adjust for square footage, bathroom count, lot size, and year built. When sales are thin in a neighborhood, the model guesses. Those guesses are where a lot of over-assessments come from.

The result lands in your annual assessment notice, mailed in late February. Your value also sits on OTR's online portal. ^[2] The notice shows last year's value, your new value, and an estimated tax bill. That estimated bill is where most people first feel the shock.

What are DC's property tax rates and how do they apply to your assessed value?

DC's residential rate is $0.85 per $100 of assessed value for owner-occupied homes as of Tax Year 2024. ^[3] Commercial property carries $1.65 per $100. Vacant property gets taxed at $5.00 and blighted property at $10.00 per $100, a deliberate penalty meant to push abandoned buildings back into use.

Property classification	Tax rate per $100
Residential (owner-occupied)	$0.85
Commercial	$1.65
Vacant property	$5.00
Blighted property	$10.00

The math is simple. Take your assessed value, subtract any Homestead Deduction, divide by 100, multiply by the rate. A $600,000 home with the Homestead Deduction pays roughly $4,383 at the $0.85 rate.

DC taxes in two installments. The fiscal year runs October 1 through September 30. First-half bills are due March 31, second-half bills September 15. ^[3] If a mortgage servicer escrows your taxes, those dates are their problem. If you pay directly, miss them and you owe penalty and interest.

Here's what catches people off guard. Your annual assessment often jumps far more than your tax bill actually rises, because the Homestead Deduction and the 10% cap on taxable value increases soften every spike. More on both below.

What is the Homestead Deduction and who qualifies?

The Homestead Deduction is DC's best break for owner-occupants. It subtracts $84,350 from your assessed value before the tax rate applies. ^[4] On a $600,000 home, that drops your taxable value to $515,650 and saves you about $717 a year at the $0.85 rate.

You qualify if the property is your principal residence and you own it. You apply once with Form FP-100, online or by mail, and the deduction stays put as long as you keep living there. No annual re-filing.

The deduction also switches on the cap. Homestead properties can't see their taxable assessed value rise more than 10% in a single year, whatever the market does. ^[1] So if OTR assesses your home 20% higher than last year, you pay taxes on last year's taxable value plus 10% and no more. The excess sits on your record but doesn't hit the bill yet.

Bought recently and haven't filed FP-100? File it now. There's no penalty for filing late, but the deduction never applies retroactively to years before you filed. ^[4] That's real money you don't get back.

What other DC property tax exemptions can lower your bill?

Past the Homestead Deduction, DC has several targeted breaks worth checking.

The Senior Property Tax Relief Program cuts your real property tax in half if you're 65 or older, own and live in the property, and have a combined household gross income of $150,000 or less (threshold as of TY 2024). ^[5] You apply with Form FP-100A. Qualify and you stack both the Homestead Deduction and the 50% reduction.

The Low-Income Senior and Disabled Property Tax Relief Program goes further. Owners who are 65 or older or totally disabled, who meet an income test OTR adjusts periodically and an assessed value ceiling, can defer the whole bill or take a credit that nearly wipes it out. ^[5] The thresholds move, so read OTR's current instructions before you apply.

Disabled veterans who are totally and permanently disabled from service-connected causes can get a full exemption on their principal residence. ^[6]

Nonprofits that own property for religious, educational, or charitable use have to apply for exemption each year or when ownership changes. Buy a property from an exempt nonprofit and assume the exemption came with it, and you're wrong. It does not transfer automatically. ^[1]

For how property assessment value gets calculated across different jurisdictions, that article walks through the methodology.

When does DC mail assessment notices and what are the appeal deadlines?

The DC timeline is tighter than most homeowners expect. You get roughly five weeks from the notice to the appeal deadline. Here's how a typical residential appeal runs:

Event	Approximate date
OTR mails annual assessment notices	Late February
First-level appeal (OTR informal hearing) deadline	April 1
OTR issues informal hearing decision	Within 45 days of hearing
Appeal to Real Property Tax Appeals Commission (RPTAC)	45 days after OTR decision
Appeal to DC Superior Court	6 months after RPTAC decision

April 1 is the deadline that trips people up. ^[7] You file the first-level appeal directly with OTR. Disagree with their decision and you escalate to RPTAC, an independent quasi-judicial body. After RPTAC, the last step before court is a petition to DC Superior Court. Each level needs a fresh filing.

Commercial and income-producing properties follow the same administrative timeline, but the evidence RPTAC wants is much heavier. Commercial owners usually need an appraisal, more than comparable sales printouts.

Miss April 1 and you've lost your administrative appeal for that tax year. You can still chase a refund later if you find an error, but the bar climbs. Set a February calendar reminder the moment your notice lands.

How do you file a DC property tax appeal without hiring a lawyer?

Filing the first-level appeal with OTR is something you can do yourself in an afternoon. You submit online through MyTax.DC.gov or mail the informal hearing request form. ^[7] You state your claimed value, explain briefly why the assessment is wrong, and attach your evidence.

The hearing is informal. An OTR appraiser reviews your submission and your property record. They may set up a phone call or an in-person visit. Most residential informal hearings resolve without you ever walking into a hearing room, and the appraiser can lower the value on the spot if your evidence holds up.

What works as evidence:

• Recent sales of similar properties nearby, within the last 12 months, within a quarter mile if you can find them
• Defects the mass appraisal model missed (a wet basement, a dead HVAC, an unpermitted addition that cut usable space)
• A recent appraisal from a licensed DC appraiser (the strongest single piece of evidence you can bring)
• Errors in your property record: wrong square footage, wrong bedroom count, wrong construction grade

Start with the OTR property record. Pull it from the DC Geographic Information System or OTR's portal ^[2] and check every field against reality. A two-bedroom house assessed as a three-bedroom happens more than you'd guess.

Want a structured process for gathering comps and writing your argument? The TaxFightBack DIY appeal kit walks through the OTR evidence standard step by step, so you keep 100% of any reduction with no contingency fee.

For how nearby jurisdictions handle appeal evidence, Philadelphia property tax and Montgomery County property tax both lean on comparable sales the same way.

What evidence actually wins a DC property tax appeal?

Comparable sales win DC appeals. OTR appraisers value property the way a licensed appraiser does: find recent sales of physically similar homes in the same or a comparable neighborhood, then adjust for differences. Bring the same thing back at them and you're speaking their language.

Your best comps: 1. Sold within the prior 12 months (OTR's assessment date is January 1, so sales from January through December of the prior year fit best) 2. Sit within a few blocks, or at least in the same neighborhood designation 3. Match your property type (rowhouse, detached single-family, condo in the same building) 4. Come close on square footage, lot size, and condition

Pull DC sales data from the Recorder of Deeds online search or OTR's sales database. ^[8] Zillow and Redfin can point you toward sales, but confirm the price and date in the official recorder record before you present anything.

Condition evidence carries weight too. If your property has problems the appraiser couldn't see from the street, document them with photos and contractor estimates where you can get them. A cracked foundation with a $40,000 repair estimate is real money that a clean comparable sale never reflects.

What doesn't work: saying the tax is too high because money's tight, or that your neighbor's identical house is assessed lower. Both feel compelling. Neither speaks to market value, and market value is the only legal standard. ^[1] If your neighbor's assessment is lower and you think it's closer to accurate, the right move is to argue your value should match theirs because the sales prove that's the market, and here are the sales.

For how comparable sales get structured inside an appeal, values assessment has a solid methodology walkthrough.

How do you look up your DC property tax assessment and payment history?

OTR runs a public property search that shows current assessed value, taxable value, active exemptions, and payment history. Get there through the OTR Real Property Tax database. ^[2] You search by address or by square/suffix/lot number, DC's parcel identifier.

The DC Geographic Information System (GIS) maps every parcel and lets you pull the property record card, the internal document describing your home as OTR sees it. ^[9] Square footage, room count, construction grade, condition rating, they all live there. Any error in those fields is your first target.

DC also posts neighborhood-level assessment statistics, so you can see whether values in your area rose 5% or 20% in aggregate. If your individual property jumped 30% in a neighborhood that averaged 8%, that gap is worth digging into.

For tools that work in any jurisdiction, property tax records and property tax lookup cover the mechanics.

What happens at the Real Property Tax Appeals Commission (RPTAC)?

RPTAC is DC's independent administrative tribunal for property tax disputes. ^[10] If OTR's informal hearing didn't cut your value enough, or at all, RPTAC is next. You have 45 days from the date of OTR's written decision to file.

RPTAC hearings run more formally than OTR's informal reviews. You appear in person or virtually, present your evidence, and a hearing officer can question you and the OTR appraiser. Decisions come in writing, usually within 90 days of the hearing for residential cases.

Residential owners can represent themselves. No attorney needed. Bring organized comps, your property record with the errors marked, and any appraisal or contractor estimate you have. Be direct: state your claimed value, explain each piece of evidence, let the appraiser respond.

Commercial and income-producing properties are a different animal. RPTAC expects income and expense data, a capitalization rate analysis, or a full MAI appraisal. Self-representation is technically allowed but practically very hard for commercial cases without professional help.

RPTAC decisions can go to DC Superior Court under DC Code § 47-825.01a. ^[1] Court appeals need an attorney for most owners and can drag on for years. The large majority of residential disputes settle long before that.

How does DC's 10% cap work and can it actually save you money?

The 10% cap is one of DC's most misunderstood features. It limits how much your taxable assessed value can climb in one year, but only if you have an active Homestead Deduction on file. ^[1] The cap hits the taxable assessed value, not the total assessed value.

Here's the practice. Say your taxable value was $500,000 last year and OTR now assesses at $650,000. Without the cap, you'd pay on $650,000 minus the Homestead Deduction. With the cap, your taxable value can only reach $550,000 ($500,000 times 1.10). The remaining $100,000 above the cap carries forward on your record but generates no bill yet.

In a rising market, that's real protection. In a falling market it runs in reverse: if your assessed value drops below your capped taxable value, your taxable value drops with it.

The cap won't protect you from a correct assessment when the market genuinely moved. It only smooths the increase across years. And it resets if you sell or lose the Homestead Deduction, say by converting the home to a rental.

This is exactly why you shouldn't skip the April 1 deadline even when your bill looks manageable. An assessed value sitting above market builds a carryforward that bites in future years as the cap lets it work through. You pay for today's over-assessment later.

What should DC commercial property owners know about assessments?

OTR values commercial property using the income approach, the sales comparison approach, or both, depending on property type. ^[1] Income-producing properties (apartments, office, retail, industrial) get valued mainly by capitalizing net operating income. The appraiser applies a market cap rate to your stabilized NOI.

The trouble is OTR's income and expense assumptions often miss your specific building. Higher-than-average vacancy, deferred maintenance, below-market rents locked in by long-term tenants, big capital expenditure coming up, the mass appraisal model captures none of it. Those are the exact issues to bring to appeal.

Check your use classification too. DC taxes vacant property at $5.00 per $100 and blighted property at $10.00 per $100. ^[3] An owner who plans to develop but hasn't pulled permits can find the property classified vacant and staring at a bill six times what an occupied building would owe. Fixing that classification deserves its own appeal.

The deadline and process match residential: April 1 for the OTR informal hearing. But the evidence bar at RPTAC for commercial cases is high. If your commercial assessment is large, a professional appraisal almost always pays for itself given what's on the line.

Owners with commercial property elsewhere can compare the approach in Clark County property tax and Loudoun County property tax to see how income-approach jurisdictions differ.

How does DC compare to neighboring Maryland and Virginia on property taxes?

DC's residential rate of $0.85 per $100 is lower than most people guess given how expensive housing is there. Maryland counties generally run $0.70 to $1.20 per $100, with Montgomery County at $1.0889 per $100 for county tax alone plus a state rate. ^[11] Virginia localities vary widely, with Loudoun County around $0.87 per $100 in recent years. ^[12]

The rate is only half the story. DC assesses at 100% of market value with no fractional ratio, and DC home values sit among the highest in the region. Median single-family assessed values top $700,000 in most neighborhoods, so even at $0.85 per $100 the dollar amounts add up fast.

The Homestead Deduction and 10% cap make DC friendlier to long-term owner-occupants than the nominal rate suggests. Someone who's lived in the same rowhouse for 20 years often pays on a value well below current market, thanks to years of cap accumulation.

DC's appeal process is more accessible than Virginia's circuit court route and roughly as difficult as Maryland's Property Tax Assessment Appeals Boards. All three let you represent yourself at the first level.

For how to approach an appeal across the line in Maryland, Montgomery County property tax covers the process in detail.

What are the most common mistakes DC property owners make with their assessments?

Missing the April 1 deadline is the most expensive mistake, and it happens every single year. The notice arrives in late February, owners assume they have months, and the window shuts. Verify your deadline each year at OTR's website, but the statute has read April 1 for years running. ^[7]

The second most common mistake is accepting the assessment because the bill looks manageable. An assessed value above market builds a bigger base for future years. In a flat or falling market, that value eventually produces bills you never planned for.

Skipping the property record is a wasted chance. OTR's records aren't perfect. Square footage, room counts, and quality grades carry errors that have hung around for years in some cases. Pull your record card before you do anything else.

Filing an appeal with no evidence is almost as useless as not filing. "I think my house is worth less" is not evidence. Two or three nearby sales from the same period, showing a lower price per square foot than OTR implied, is evidence. The difference decides your case.

And some owners never file the Homestead Deduction and don't notice for years. Check right now whether FP-100 is on file for your property. OTR's online database lists active exemptions. ^[2] Missing? File today.

For the appeal process from a national angle, Property tax explained: how it's set and how to appeal it gives the broader framework, and TaxFightBack's DIY appeal kit turns that framework into DC-specific filings.

Frequently asked questions

When does DC mail property tax assessment notices?

OTR mails annual real property assessment notices in late February for the upcoming tax year. Your notice shows the prior-year value, new assessed value, and an estimated tax bill. You can also view your current assessment online at OTR's real property portal any time of year. The filing deadline for a first-level appeal is April 1.

What is the DC property tax rate for residential homes?

The residential real property tax rate in DC is $0.85 per $100 of assessed value for most owner-occupied homes as of Tax Year 2024. The higher rate of $1.65 per $100 applies to commercial properties. Vacant property is taxed at $5.00 per $100 and blighted property at $10.00 per $100 as a policy disincentive.

How do I appeal my DC property tax assessment?

File a first-level informal hearing request with OTR by April 1. You can do this online at MyTax.DC.gov or by mailing the request form. Attach comparable sales, photos of defects, or a recent appraisal. If OTR's decision doesn't satisfy you, appeal to RPTAC within 45 days of that written decision. Self-representation is allowed at both levels for residential property.

What is the DC Homestead Deduction and how much does it save?

The DC Homestead Deduction subtracts $84,350 from your assessed value before the tax rate applies, saving most homeowners roughly $717 per year at the $0.85 rate. It's available to owner-occupants who file Form FP-100 with OTR. You file once and the deduction stays active until you sell or change use. It also activates the 10% annual cap on taxable value increases.

Can seniors in DC get a property tax reduction?

Yes. Homeowners who are 65 or older, own and occupy their home, and have a combined household gross income of $150,000 or less qualify for the Senior Property Tax Relief Program, which cuts their real property tax bill in half. Lower-income seniors and totally disabled owners may qualify for even greater relief or deferral through the Low-Income Senior and Disabled program. Apply with Form FP-100A.

What does the 10% cap on DC property tax assessments mean?

For homeowners with an active Homestead Deduction, DC limits the annual increase in taxable assessed value to 10%, no matter how much the market rose. If OTR assesses your home 20% higher this year, you only pay taxes on last year's taxable value plus 10%. The excess carries forward and can work through in future years, but it smooths large market swings.

What evidence do I need to win a DC property tax appeal?

Comparable sales are most effective: two to four properties similar to yours that sold within the prior 12 months for less per square foot than OTR's assessment implies. You can supplement with photos of defects, contractor repair estimates, or a licensed appraisal. Data errors in your property record (wrong square footage, wrong room count) are also strong grounds. Arguing affordability rather than value doesn't work.

How do I find my DC property's assessed value online?

Go to OTR's real property database at otr.cfo.dc.gov and search by address or square/suffix/lot number. The result shows current assessed value, taxable value, active exemptions, and payment status. The DC GIS system shows the full property record card with the characteristics OTR used to arrive at the value, including square footage, room count, and condition grade.

What is the Real Property Tax Appeals Commission (RPTAC) and how does it work?

RPTAC is DC's independent quasi-judicial body that hears property tax appeals after OTR informal hearings. You file within 45 days of OTR's written decision. Hearings are more formal than OTR reviews: you present evidence to a hearing officer who can question both you and the OTR appraiser. Written decisions come within roughly 90 days. Residential owners can represent themselves; commercial cases typically benefit from professional help.

Are commercial properties in DC assessed the same way as residential?

No. OTR primarily uses the income approach for commercial and income-producing property, capitalizing estimated net operating income at a market cap rate. Residential property uses mainly the sales comparison approach. Commercial appeals at RPTAC require income and expense documentation, often a full MAI appraisal. The filing deadline is the same: April 1 for the OTR informal hearing.

What happens if I miss the April 1 DC property tax appeal deadline?

You lose your right to an administrative appeal for that tax year. You can still file an amended return or a refund claim if you discover a factual error (like a clerical mistake in your property record), but the standard for those filings is narrower and the process is harder. There's no grace period. If you miss April 1, plan now for the following year and document your evidence in the meantime.

Does DC property tax assessment apply to condominiums?

Yes. Each condo unit is assessed individually as a separate parcel. The mass appraisal model looks at sales of units within the same building and similar buildings nearby. Condo owners can appeal on the same grounds as single-family homeowners: comparable sales, data errors, and condition defects. The Homestead Deduction and senior exemptions are available to condo owner-occupants who file FP-100.

How often does DC reassess property values?

DC reassesses every parcel annually as of January 1 of each tax year. This is more frequent than many states, which reassess on two- to five-year cycles. Annual reassessment means your value can move each year in either direction depending on the sales data OTR's model uses. The Homestead Deduction cap limits how much the annual change affects your bill for owner-occupants.

Is a licensed appraisal required to appeal a DC property tax assessment?

No, it's not required. Many residential owners win appeals using nothing more than a few well-selected comparable sales and a corrected property record. A licensed appraisal is the strongest single piece of evidence and is usually worth the cost (typically $400 to $700 for a DC residential appraisal) if your potential savings are significant, but it's not a legal prerequisite at either the OTR or RPTAC level.

Sources

1. DC Code § 47-820 and § 47-825.01a, DC Office of the Law Revision Counsel: DC assesses real property at estimated market value; Homestead Deduction activates 10% cap on taxable value increase; RPTAC decisions appealable to DC Superior Court
2. DC Office of Tax and Revenue, Real Property Tax Database: OTR public portal shows assessed value, taxable value, exemptions, and payment history by parcel
3. DC Office of Tax and Revenue, Real Property Tax Rates: Residential rate $0.85 per $100; commercial $1.65; vacant $5.00; blighted $10.00 per $100 of assessed value; first half bill due March 31, second half September 15
4. DC Office of Tax and Revenue, Homestead Deduction and Senior Citizen Homeowner Exemption: Homestead Deduction subtracts $84,350 from assessed value for qualifying owner-occupants who file Form FP-100; deduction does not apply retroactively
5. DC Office of Tax and Revenue, Senior Property Tax Relief and Low-Income Senior/Disabled Program: Seniors 65+ with household gross income $150,000 or less qualify for 50% property tax reduction; lower-income seniors and totally disabled owners may qualify for further relief or deferral
6. DC Code § 47-1002, DC Office of the Law Revision Counsel, exempt property categories: Totally and permanently disabled veterans may qualify for full real property tax exemption on their principal residence in DC
7. DC Office of Tax and Revenue, Real Property Assessment Appeals Information: April 1 is the deadline to file a first-level informal appeal with OTR; appeal can be submitted online at MyTax.DC.gov
8. DC Recorder of Deeds, Office of Tax and Revenue, real property sales records: DC Recorder of Deeds and OTR sales database provide official recorded sale prices and dates for comparable sales research
9. DC Geographic Information System (DC GIS), Office of the Chief Technology Officer: DC GIS maps every parcel and provides access to property record cards showing square footage, room count, construction grade, and condition rating used by OTR
10. DC Real Property Tax Appeals Commission (RPTAC), Office of Administrative Hearings: RPTAC is DC's independent quasi-judicial body for property tax appeals; residential owners may self-represent; written decisions issued within approximately 90 days
11. Montgomery County, Maryland Department of Finance, Property Tax Rates: Montgomery County Maryland county property tax rate approximately $1.0889 per $100 of assessed value plus state rate
12. Loudoun County, Virginia Commissioner of the Revenue, Real Property Tax Rates: Loudoun County Virginia real property tax rate approximately $0.87 per $100 of assessed value in recent years