How to Appeal Property Taxes in Montgomery County, Pennsylvania (2026 Guide)

Direct answer: For a Montgomery County annual assessment appeal filed in 2026, the deadline is Saturday, August 1, 2026; annual appeals are due August 1 of the year before the tax year under appeal. File with the Montgomery County Board of Assessment Appeals using the Montgomery County Assessment Appeal Form (Fillable)—by mail or hand delivery only; faxed or emailed appeals are not accepted. Because August 1, 2026 falls on a Saturday, hand-deliver by Friday, July 31, 2026 during office hours, or get a real USPS counter postmark/certificate of mailing no later than August 1.

How assessments work in Montgomery County

Montgomery County does not reassess every property every year. Its FAQ says assessments are set at 100% of 1996 base-year value, which means your taxable assessment is not supposed to equal today’s sale price dollar-for-dollar. The county uses the assessment to bill county, municipal, and school taxes; the tax bill is your assessed value × millage rate ÷ 1,000.

The bridge between today’s market and the old assessment base is the Common Level Ratio (CLR). For documents accepted July 1, 2026 through June 30, 2027, Montgomery County’s official CLR factor is 3.36. In appeal math, that means a market value of about $600,000 corresponds roughly to an assessment of $600,000 ÷ 3.36 = $178,571. For the prior July 1, 2025–June 30, 2026 period, the factor was 3.25.

The Board of Assessment Appeals is the proper local appeal authority. It is a three-member quasi-judicial board; the 2026 board page lists Joseph S. Foster as chairman, with Patrick Costello and Olivia Haywood as board members. The Board maintains assessment rolls, property records, and tax maps, and hears appeals by owners and others with a direct financial interest.

Whether you should appeal

You should consider appealing if your current assessment implies a market value higher than your home would realistically sell for. The quick test is:

1. Find your current assessed value on the county property records site or tax bill.
2. Multiply it by 3.36 to estimate the market value your assessment implies for the 2026–2027 appeal cycle.
3. Compare that number with recent comparable sales, an appraisal, or strong evidence about condition issues.

Example: if your assessment is $210,000, the implied market value is about $705,600. If similar homes support only $600,000, you may have a credible case.

Montgomery County does not publish an official homeowner appeal success rate or median reduction in the sources reviewed, so do not rely on marketing claims. The Board’s own rules say the assessment is presumed correct and the burden of proof is on you. Good evidence can include an appraisal, comparable sales, photos showing condition problems, or other documentation supporting your opinion of fair market value.

Also understand the risk: after hearing the evidence, the Board may lower, keep, or raise the assessment. The county FAQ specifically warns that filing an appeal does not mean an automatic reduction.

Step-by-step how to file

1. Get the right form. Use the official Montgomery County Assessment Appeal Form (Fillable) for a value appeal. Other forms you may see are different: the Homestead / Farmstead Appeal Form is only for appealing a denied homestead/farmstead exclusion, and the Application for Homestead and Farmstead Exclusions is for tax relief eligibility—not for arguing market value.

2. Complete the form carefully. Include the parcel number, property location, owner contact information, your opinion of value, the assessment being appealed, reason for appeal, and any dates you are unavailable for a hearing. A separate form is needed for each parcel.

3. Sign with an original signature. Montgomery County’s 2026 rules require an original signature from the owner, equitable owner, or authorized representative; attorneys may use electronic/facsimile signatures.

4. Attach evidence. The form instructions say to submit three copies of supporting documentation with the appeal. If you later supplement the record, get the extra materials to the Board at least 10 days before the hearing.

5. Pay the filing fee. For a typical owner-occupied single-family home or individually owned condo, the fee is $50 per parcel, non-refundable, by check or money order payable to Montgomery County Treasurer. Other 2026 fees: multi-family residential $100, commercial/industrial $200, preferentially assessed properties $50, exemptions $200, homestead/farmstead appeal $0, veteran exemption appeal $0.

6. File by mail or hand delivery. Montgomery County does not accept annual assessment appeals by email, fax, or an online portal. The official filing methods are:

• Mail: Montgomery County Board of Assessment Appeals, Montgomery County Courthouse, P.O. Box 311, Norristown, PA 19404-0311.
• Hand delivery / UPS / FedEx: One Montgomery Plaza, Suite 301, 425 Swede Street, Norristown, PA 19401.
• Not accepted: email, fax, or portal submission for the actual assessment appeal.

The county warns that USPS postmarks can be delayed. To protect your deadline, mail at a post-office counter and request hand-cancellation/manual postmark, certificate of mailing, registered/certified mail, or counter postage. Hand delivery is available Monday–Friday; the Board page says the Norristown office accepts hand deliveries 8:30 a.m.–4:00 p.m.

What happens after

After a complete appeal is received, the Board schedules a hearing. Hearing dates may not be assigned for several months, especially for early filings, and the county says annual appeals must be heard by October 31. You can check hearing date/time through the county property records site by parcel number or address under “Hearing Details.”

There is not a normal paper-only option for a value appeal. The owner or a licensed attorney must appear and present the case; failure to appear results in dismissal as abandoned. If a homeowner is physically unable to appear because of illness, disability, or absence from the jurisdiction, the rules allow a neighbor or relative to appear with an original signed power of attorney.

At the hearing, expect a short, evidence-focused proceeding. You explain why the current assessment is wrong, present your appraisal or comparable sales, and answer questions. Taxing authorities—often the school district or municipality—can participate. Witnesses who give valuation testimony must disclose under oath whether their compensation depends on the result.

The Board sends written notice of the result, usually within 30 days, by first-class mail to the property owner and taxing authorities. The Board does not notify your mortgage company, so if your escrow changes, you may need to follow up yourself.

If you disagree with the Board’s decision, the next step is an appeal to the Montgomery County Court of Common Pleas. The county Prothonotary’s appeal page says an appeal from the Board of Assessment requires a petition, decree verification, and a copy of the Board’s decision, with an original and a copy.

Local tips

Use the right year’s math. A 2026 annual appeal affects the following tax year. For appeals around July 2026, use the 3.36 CLR factor for the 2026–2027 period, not the older 3.25 factor, unless your notice or appeal context clearly points to the prior period.

Do the savings math before filing. Montgomery County’s 2026 countywide rate is 5.462 mills for county tax plus 0.49 mills for Montgomery County Community College, or 5.952 mills countywide. Suppose your assessment is $210,000, but evidence supports a $600,000 market value. Using the 3.36 factor, the target assessment is about $178,571, a reduction of $31,429. County + MCCC savings would be about $187 per year: $31,429 × 5.952 ÷ 1,000. Your full savings may be much larger because the same assessment also affects your school and municipal taxes. For example, Conshohocken’s 2026 total listed millage is 36.947, so the same reduction would save about $1,161 per year before any homestead effects.

Check exemptions separately. If the property is your primary residence, confirm your Homestead/Farmstead Exclusion status on the county property records site. The homestead application says Act 1 school relief for tax years beginning July 1, 2027 must be filed by the preceding March 1, and local Act 50 relief for tax year beginning January 1, 2027 must be mailed by December 15, 2026. If you were denied homestead/farmstead status, the homestead appeal deadline is 40 days from the denial notice, and that hearing cannot be used to challenge property value.

Look at rebate and deferral programs too. Montgomery County’s tax-burden page points residents to the Pennsylvania Property Tax/Rent Rebate Program, with 2026 income eligibility listed at $46,520 or less and age/disability criteria. Montgomery County also has a county real estate tax deferral program for eligible residents, and a volunteer emergency services tax rebate program that can rebate up to 100% for qualifying fire/EMS volunteers.