How To Challenge a High Property Tax Assessment
Property taxes can be stressful, especially if your bill feels too high. Many homeowners wonder, “How do you challenge a high property tax assessment?”
Whether you live in Londonderry or are looking at other Southern NH houses for sale, understanding the process can save you thousands. By following a few steps, you can ensure your home is fairly valued and your taxes are accurate.
Here’s a comprehensive guide to challenging your property tax assessment effectively.
1. Understand Your Property Tax Assessment
Before you can challenge a high property tax assessment, you need to know how it works.
Property taxes are based on the assessed value of your home.
Local tax rates multiply your assessment to determine your annual bill.
Errors in square footage, property features, or comparable sales can increase assessments unfairly.
Knowing the details ensures your challenge is well-informed and effective.
2. Review Your Assessment Notice Carefully
Every homeowner receives an assessment notice. To challenge a high property tax assessment:
Check the recorded square footage and lot size.
Confirm details like number of bedrooms, bathrooms, and amenities.
Note discrepancies or errors that could lower the assessed value.
Accurate documentation makes your case stronger when speaking with your local assessor.
3. Research Comparable Properties
Comparable homes provide a benchmark. To challenge a high property tax assessment:
Look for recent sales of similar homes in Londonderry or Southern NH.
Compare features like square footage, age, and lot size.
Note if neighbors with similar homes pay less in property taxes.
This comparison proves whether your assessment is too high.
4. Gather Evidence
Strong evidence is critical when you challenge a high property tax assessment.
Take photos of your home, noting any wear or needed repairs.
Collect recent appraisals or market analyses.
Include comparable sales data and local property tax records.
Documenting facts ensures your appeal is persuasive and credible.
5. Contact Your Local Assessor
Start by speaking with your town or city assessor. To challenge a high property tax assessment effectively:
Request clarification on how your property was assessed.
Present your evidence politely and professionally.
Ask if informal adjustments are possible before filing a formal appeal.
Many assessment errors are corrected at this stage without going to a formal hearing.

6. File a Formal Appeal
If your informal approach doesn’t work, you can file an official appeal. Steps include:
Submit forms and supporting documents by your town’s deadline.
Attend a hearing to present your case.
Be concise, factual, and professional in your presentation.
Understanding the procedure ensures you don’t miss important deadlines.
7. Present a Clear and Logical Argument
During your appeal, organization is key. To challenge a high property tax assessment:
Start with the assessment facts and discrepancies.
Highlight comparable sales that show your home is overvalued.
Use photos, appraisals, and evidence to support your case.
A clear, logical presentation increases your chances of success.
8. Be Ready for Questions
Assessors or boards may ask questions. To challenge a high property tax assessment:
Be prepared to explain differences in property features.
Clarify repairs, maintenance issues, or neighborhood conditions.
Stay calm and factual during questioning.
Professionalism and preparation help you present a strong case.

9. Consider Hiring a Professional
Some homeowners hire property tax consultants or real estate agents. Benefits when you challenge a high property tax assessment:
Professionals know local procedures and deadlines.
They can gather and present evidence more efficiently.
Experienced agents understand market trends in Southern NH, including Londonderry houses for sale.
Professional guidance can make appeals faster and more successful.
10. Keep Records of Every Step
Documentation matters. To challenge a high property tax assessment effectively:
Save copies of forms, emails, and correspondence.
Keep notes from conversations with assessors or consultants.
Record all deadlines and submissions.
Good records protect you in case of disputes or future appeals.
11. Understand Your Rights and Local Laws
Every NH town has rules for property tax appeals. To challenge a high property tax assessment:
Review state and local property tax regulations.
Know deadlines for filing appeals.
Understand the appeals board process and hearing format.
Knowledge of laws gives homeowners confidence during the appeal process.
12. Highlight Any Home Issues
Condition affects value. When you challenge a high property tax assessment:
Show evidence of needed repairs or outdated systems.
Document exterior and interior maintenance issues.
Mention neighborhood factors that may lower property value.
Highlighting these issues supports a lower assessed value for your home.

13. Use Comparable Sales Strategically
Comparables are critical. To challenge a high property tax assessment:
Compare your home to similar nearby properties.
Focus on sales within the last year.
Include properties with similar size, age, and amenities.
This approach makes your appeal objective and data-driven.
14. Understand Appeals Board Procedures
Each town may have unique procedures. When you challenge a high property tax assessment:
Learn the board’s rules for submitting evidence.
Understand hearing formats and how to present your case.
Know the voting process and decision timeline.
Being informed avoids mistakes that could weaken your appeal.
15. Prepare a Written Summary
A concise written summary strengthens your appeal. To challenge a high property tax assessment:
Summarize errors in your assessment.
Highlight supporting evidence like comparables and appraisals.
Keep the summary clear, factual, and persuasive.
This summary ensures the board understands your case quickly.
16. Attend the Hearing Professionally
Your appearance matters. To challenge a high property tax assessment:
Dress professionally.
Bring all evidence organized.
Speak calmly and clearly.
Professional presentation can positively influence the outcome.
17. Consider Negotiation Opportunities
Sometimes, assessors offer compromises. To challenge a high property tax assessment:
Ask if adjustments can be made before a formal decision.
Negotiate using your evidence and comparable sales.
Accept reasonable reductions to avoid lengthy appeals.
Negotiation can save time and reduce stress for Southern NH homeowners.

18. Know the Possible Outcomes
Outcomes vary. When you challenge a high property tax assessment:
Full reduction to fair market value.
Partial reduction with some relief.
Denial of appeal, requiring payment as assessed.
Knowing possibilities helps set realistic expectations.
19. Plan Ahead for Next Year
Even after an appeal, preparation matters. To challenge a high property tax assessment in the future:
Keep updated records of property improvements or damages.
Monitor sales of similar homes in your neighborhood.
Regularly review your assessment notice for accuracy.
Proactive planning reduces the risk of overpaying in the future.
20. Work With Your REALTOR
A knowledgeable REALTOR can guide you. To challenge a high property tax assessment:
Use your agent’s market knowledge to gather comparables.
Get advice on timing and appeal strategy.
Leverage your agent’s experience with Southern NH and Londonderry houses for sale.
A REALTOR adds insight, professionalism, and local expertise to your appeal.

How Do You Challenge a High Property Tax Assessment
Property taxes can feel overwhelming, but homeowners have tools to protect themselves. To challenge a high property tax assessment:
Review your notice carefully.
Gather strong evidence, including comparables and appraisals.
Contact your assessor and consider a formal appeal.
Attend hearings professionally and consider professional guidance.
Whether you own Londonderry houses for sale or other Southern NH properties, these steps ensure your taxes are fair, accurate, and reflective of your home’s true value.
If you need more information on how to challenge a high property tax assessment, or are ready to sell your house give us a call at (603) 883-8840. You can also sign up for your dream home search or reach out to Our Agents for more information. We’d love to help you with your real estate needs.