New Hampshire Landlord Tenant Law: What Every Investor Must Know

New Hampshire's landlord-tenant statutes are among the most tenant-protective in New England. The penalties for administrative errors — late deposit returns, missing receipts, improper deductions — are automatic and severe. Understanding RSA Chapter 540 (evictions) and RSA Chapter 540-A (prohibited practices and security deposits) is not optional if you own rental property in this state. It's the foundation of avoiding costly litigation.

Security Deposits Under RSA 540-A

The rules around security deposits generate more landlord liability than almost any other aspect of New Hampshire rental law.

The cap: A landlord cannot collect a security deposit exceeding one month's rent or $100, whichever is greater.

The escrow requirement: The deposit is the legal property of the tenant and must be held in a separate, interest-bearing escrow account at a financial institution that operates within New Hampshire. Commingling deposit funds with personal or operating funds is a statutory violation — not a technicality, but a separate ground for double-damages liability.

The receipt mandate: When you collect the deposit — or within 30 days — you must provide the tenant with a written receipt containing: the exact deposit amount, the name and physical address of the bank, the specific escrow account number, and the current interest rate. The receipt must also notify the tenant that they have five days from move-in to submit a written list of any pre-existing damage.

Annual interest: For tenancies lasting one year or longer, you must pay the tenant interest equal to the rate earned by the escrow account. This is paid annually or credited against rent if the tenant requests it.

The 30-Day Return Window

Under RSA 540-A:7, you have 30 days from the date the tenant vacates and returns possession to either return the full deposit plus accrued interest, or return the balance with an itemized written statement of deductions. The 30-day clock does not start until all tenants on the original lease have vacated — joint and several liability means a partial move-out does not trigger the window.

Allowable deductions are limited to: unpaid rent, the tenant's contractual share of real estate tax increases (if in the lease), other charges specified in the lease, and actual costs to repair damage beyond normal wear and tear. Every deduction must be accompanied by receipts, invoices, or written contractor estimates.

The double-damages penalty: Miss the 30-day deadline, fail to provide a proper itemized statement, or commingle funds — any of these violations makes you liable for twice the deposit amount, plus accrued interest, plus the tenant's attorney's fees. A willful or knowing violation can escalate to treble damages. Tenants file enforcement petitions in local District Court with no filing fee, and the process is designed to be accessible to self-represented parties. Courts enforce the 30-day timeline strictly.

Who's Exempt from the Security Deposit Rules

The security deposit regulations do not apply to landlords who lease a single-family home and own no other rental properties, or to owner-occupied buildings of five or fewer units. However, the owner-occupant exemption is completely eliminated for any unit in the building occupied by a tenant aged 60 or older — that unit must receive full statutory protection regardless.

The Implied Warranty of Habitability

Under RSA 540:13-d, every residential tenancy carries an implied warranty of habitability that cannot be waived by lease agreement. You must maintain:

• Clean, hot and cold running water (if the property uses a private well, the water must meet state safety standards, including the 5.0 ppb arsenic limit)
• Functional heating capable of maintaining safe temperatures in winter
• Structural integrity of roof, walls, windows, and foundation
• Response to rodent or insect infestation reports within 7 days, with immediate remediation

If you breach the habitability warranty, tenants can withhold rent after providing written notice and allowing reasonable time for repairs. In any eviction for nonpayment, the tenant can raise breach of habitability as an affirmative defense.

Required Disclosures

For pre-1978 properties, you must provide a federal Lead-Based Paint Disclosure and the EPA "Protect Your Family From Lead in Your Home" pamphlet. If water testing has been conducted and reveals elevated arsenic, radon, uranium, or PFAS levels, you must disclose those results to incoming tenants. As of January 1, 2025, sellers are now required to notify buyers in writing about PFAS contamination risks under House Bill 398 — meaning the disclosure obligation now starts at the point of purchase, before you even have tenants.

Rent Control and Lease Agreement Basics

New Hampshire state law prohibits municipal-level rent control. You can adjust rents to prevailing market rates upon lease expiration without restriction from any local ordinance.

For lease agreements, you should ensure your template addresses the following for New Hampshire specifically: the exact security deposit amount and escrow location, utility responsibility allocations, the five-day pre-existing damage inspection period, tenant obligations for real estate tax increases if you want to pass those through, and any lease-specific charges that you want available as deduction grounds when the tenancy ends. The more specific your lease on allowable deductions, the stronger your position in any deposit dispute.

Prohibited Practices Under RSA 540-A:3

New Hampshire law explicitly prohibits self-help evictions. You cannot:

• Change the locks or lock a tenant out without a court order
• Shut off utilities — water, heat, electricity, gas — regardless of whether you control the utility
• Seize, move, or deny access to the tenant's personal property
• Enter the unit without permission or reasonable notice, except for genuine emergencies

Violations trigger a civil penalty of $1,000 per violation, and each day a continuing violation persists counts as a separate violation. If you lock out a tenant and then re-let the unit to a new tenant, the statutory minimum penalty is $3,000. The tenant files an emergency petition at no cost; you pay sheriff service fees and the tenant's attorney fees.

The only path when a tenant won't leave is the formal legal process under RSA 540 — not self-help.

What New Hampshire Lease Agreement Templates Need

Generic lease templates from national legal form sites often miss New Hampshire-specific requirements. A compliant NH lease must include:

• A security deposit receipt clause that specifies the escrow bank and account details
• Language preserving the landlord's right to deduct for itemized damage with receipts
• A clear statement of the five-day pre-existing damage inspection period
• Disclosure of the arsenic/water quality status for properties on private wells
• Lead paint disclosure for pre-1978 properties
• The exact terms under which the tenant bears any share of real estate tax increases

The New Hampshire Investment Property Guide covers RSA 540-A compliance in detail, including a checklist for security deposit administration and the prohibited practices landlords must avoid. Getting these procedures systematized before you have your first tenant is far cheaper than fixing them after a double-damages judgment.

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