Local guide
Mold in Derry, New Hampshire
Derry's building and property-maintenance rules provide a framework for reporting an unsafe or deteriorated home. Describe the physical condition and ask the town's code official which inspection process applies.
Local resource reviewed: 2026-10-10
New Hampshire legal sources reviewed: 2026-09-19
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Start With Your Derry Property
For a damp room, identify the affected material and the nearest plumbing, roof, or exterior opening. Avoid removing finished surfaces before the source and any other material hazards have been evaluated.
Derry building and property-maintenance code
The town's published Chapter 30 covers building and property-maintenance codes and identifies the officials responsible for administration. Use the town's current Code Enforcement and Building contacts to discuss a condition.
Before you contact them:Provide the Derry address, unit, observed defect, and prior owner notices. Ask which code official can review it and what inspection or complaint documentation is required.
Open the official local resource
Local resource reviewed 2026-10-10. An agency inspection or complaint does not replace the repair request to your landlord.
Choose Your Next Action
Clues to Record
These observations help direct an inspection; they do not identify mold type, hidden extent or a medical cause.
- Dampness or visible growth that returns after cleaning or a claimed repair.
- A recurring musty odor, especially near a previously wet wall, cabinet, or floor.
- Soft, swollen, peeling, or discolored material; stains alone do not identify a mold species or show whether material is currently wet.
Guidance: EPA cleanup decisions | CDC cleanup precautions
Plan the Work and Compare Bids
Record the affected areas, source repairs, containment, material removal and completion checks before comparing contractors. This planner organizes the scope; it does not predict a local price or replace written bids.
State Laws and Rights
Check New Hampshire notice requirements and the coverage of your tenancy before using a rent remedy or ending a lease. The local reporting contact above can address only the issues within its stated scope.
New Hampshire mold law snapshot
New Hampshire has mold-specific rules in addition to general habitability standards.
New Hampshire recognizes an implied warranty of habitability for all residential rentals. This warranty means that landlords must provide and maintain safe and habitable rental property, whether or not the lease agreement specifically says so and even if the lease tries to waive the obligation. To constitute a breach, the defect must be of a nature and kind which renders the premises unsafe or unsanitary, and thus unfit for living therein. RSA 48-A:14 establishes specific minimum standards including requirements for pest-free conditions, functional plumbing, electrical safety, structural integrity, adequate water supply, and heating facilities capable of maintaining at least 65 degrees Fahrenheit in habitable rooms.
Use the full New Hampshire guide for tenant rights, landlord responsibilities, and remedies.
Repair Notices and Rent Decisions
Start with these New Hampshire rules, then check the local regulations section and your property's coverage. A statutory notice period is not always a deadline for finishing every repair. Keep proof of notice and get local legal advice before changing rent payments or ending a lease.
How long does a Derry landlord have to fix mold?
No universal mold-specific repair deadline was confirmed for New Hampshire in the sources reviewed for this guide. Treat timing as notice-and-condition specific: document the mold and moisture source in writing, use the cited habitability or repair source, and get local code enforcement or legal aid advice before treating any deadline as fixed.
Sources: New Hampshire General Court - RSA 48-A:14 Minimum Standards Established
Can Derry tenants withhold rent for mold?
Tenants may withhold rent under limited conditions established by RSA 540:13-d. The tenant must: (1) give the landlord written notice of the violations while not behind in rent; (2) wait 14 days for the landlord to take corrective action; and (3) the premises must be in substantial violation of health and safety standards. However, this defense is only available in an action based on non-payment of rent, and is not available if the tenant owes the landlord the equivalent of one week's rent or more. Courts have held that rent withholding without a court order is risky, and tenants should seek legal advice before attempting this remedy.
Sources: courts-state-nh-us.libguides.com | New Hampshire General Court - RSA 48-A:14 Minimum Standards Established
Does mold in Derry require relocation?
Unclear as a standalone statewide mold relocation benefit in the sources reviewed for this guide. If mold or remediation makes the unit unsafe or unusable, New Hampshire tenants should look to the cited habitability, essential-services, condemnation, disaster, or lease-termination rules and ask legal aid whether rent abatement, substitute housing, temporary vacancy, or termination applies.
Sources: New Hampshire General Court - RSA 48-A:14 Minimum Standards Established
Does mold have to be disclosed in Derry?
New Hampshire does not have a specific statewide mold disclosure requirement for rental properties. Landlords must comply with state housing standards and any local housing codes, and tenants should document conditions at move-in and communicate repair requests in writing.
Sources: New Hampshire DHHS - Housing Standards | New Hampshire General Court - RSA 48-A:14 Minimum Standards Established
Frequently Asked Questions
These FAQs cover the questions readers usually ask next in Derry: what to do first, when to test, and how local mold problems connect back to New Hampshire law.
Who can help with a housing-condition complaint in Derry?
What should I inspect first at my home in Derry?
What are the first signs of mold in Derry homes?
When should I hire a mold professional in Derry?
Do ice dams cause mold in Derry homes?
How does winter condensation lead to mold in Derry?
Cleanup and testing guidance: EPA cleanup guidance | EPA sampling guidance | CDC cleanup precautions
Reference Data and Limits
Reference Sources for Derry
These are selected reference-location outdoor and housing-stock inputs. The station does not necessarily represent every neighborhood or elevation in the city. They are not indoor measurements, a mold-growth forecast, or evidence about a particular building. The humidity-month list is a Mold Compass threshold screen, not a NOAA-defined mold season.
Sources: [NOAA precipitation normal, 1991-2020] | [NOAA reference-station outdoor relative-humidity normal (MANCHESTER AP, NH US); 1991-2020] | [US Census ACS median structure year for Derry CDP, New Hampshire (place GEOID 3317860; exact-place); 2024 ACS 5-year]
Official Resources
Use these official agencies, program links, and state resources when you need primary sources instead of general advice.
Need Help Paying for Repairs?
Find New Hampshire repair-assistance contacts, financing programs and legal referrals, with eligibility and service limits.
View New Hampshire Assistance ProgramsLocal Extension Resources
University extension programs often publish research-based prevention and cleanup guidance.
View New Hampshire Extension Resources