To rent out part of your house legally, you need to confirm your local zoning and any HOA rules allow it, meet building-code habitability and disclosure requirements, adjust your homeowners insurance, use a written lease designed for shared living, screen applicants within fair housing and fair credit limits, and report the rental income on your federal tax return. Miss any of these and you risk fines, denied insurance claims, or a lease you cannot enforce. The work is manageable once you take it step by step.
Confirm Zoning, HOA, and Licensing
Start with your city or county zoning code. It determines whether your parcel can legally house a paying tenant at all. Most residential neighborhoods are zoned for single-family use, and some of those designations restrict how many unrelated people can live under one roof. Renting a spare bedroom to one person is different, in zoning terms, from converting a basement into a self-contained unit with its own entrance and kitchen. The second scenario usually qualifies as an Accessory Dwelling Unit and triggers a separate permitting process with plan review, inspections, and fees that vary by jurisdiction. Before spending money on renovations, call your local planning or building department and ask what’s allowed on your parcel.
If your home sits inside a Homeowner Association, pull the covenants, conditions, and restrictions next. Many HOAs prohibit short-term rentals entirely, and some ban any subletting or room rental without board approval. Violations can trigger fines, liens, or litigation. HOA rules operate independently of city zoning, so clearing one does not clear the other. Some municipalities also require a rental business license or annual registration. A quick check with both the HOA and the city clerk’s office saves you from discovering a violation after a tenant has already moved in.
Know the Fair Housing Rules That Apply to You
Federal fair housing law carves out an exemption for owner-occupied buildings with four or fewer units, sometimes called the “Mrs. Murphy” exemption. Under 42 U.S.C. § 3603(b)(2), if you live in the home and it contains no more than four independent living quarters, most of the Fair Housing Act’s prohibitions on discrimination in selecting tenants do not apply.1Office of the Law Revision Counsel. 42 U.S. Code 3603 – Effective Dates of Certain Prohibitions You have more latitude in choosing who shares your living space than a large landlord would.
The exemption has a hard limit. Even if you qualify, the advertising restriction in 42 U.S.C. § 3604(c) still applies. You cannot publish any listing that states or implies a preference based on race, color, religion, sex, disability, familial status, or national origin.2Office of the Law Revision Counsel. 42 U.S. Code 3604 – Discrimination in the Sale or Rental of Housing A listing can describe the room and the arrangement, but it cannot say things like “Christian household preferred” or “no children.” Federal guidance recognizes one narrow exception allowing you to specify the gender of a roommate when you will be sharing living space. Many state and local fair housing laws are stricter than the federal version and may not include the Mrs. Murphy exemption at all, so check your local rules before assuming you are covered.
Meet Habitability and Safety Standards
Every room you rent must be safe and livable. The implied warranty of habitability, recognized in nearly every state, requires you to provide space that meets basic health and safety standards. Local building codes define what that means in concrete terms, and inspectors will hold you to them.
Egress, Heat, and Detectors
Any room used for sleeping needs an emergency escape opening, typically a window large enough for a person to climb through. The International Residential Code, adopted with local modifications across most of the country, requires bedroom egress windows with a minimum net clear opening of 5.7 square feet, at least 20 inches wide and 24 inches tall. Basement bedrooms face the same standard, plus requirements for window wells sized to allow a person to stand and escape. If the room lacks a compliant window, install one before a tenant moves in.
Most building codes require heating capable of maintaining at least 68°F during cold months, and portable space heaters do not satisfy that requirement. Smoke detectors go inside each sleeping area. Carbon monoxide alarms must be installed near bedrooms, especially in homes with gas appliances or attached garages. Plumbing must deliver potable water and connect to a functioning sewer or septic system. Falling short on any of these exposes you to code violations and gives tenants legal grounds to withhold rent or make repairs at your expense.
Lead-Based Paint Disclosure for Older Homes
If your home was built before 1978, federal law requires you to disclose any known lead-based paint or lead hazards before the tenant signs the lease. Under 42 U.S.C. § 4852d, you must provide an EPA-approved pamphlet on lead safety, disclose what you know about lead paint on the property, and share any available inspection reports.3Office of the Law Revision Counsel. 42 U.S. Code 4852d – Disclosure of Information Concerning Lead Upon Transfer of Residential Property The lease itself must include a specific Lead Warning Statement, and both parties sign an acknowledgment of the disclosure.4eCFR. 40 CFR Part 745 Subpart F – Disclosure of Known Lead-Based Paint Hazards Upon Sale or Lease of Residential Property Keep a signed copy for three years after the lease begins. Skipping this step is a federal violation regardless of whether lead is actually present.
Update Your Insurance Before the Tenant Moves In
Standard homeowners policies are written for owner-occupied homes, not rental operations. Adding a paying tenant changes your risk profile, and if your insurer does not know about the arrangement, a claim involving the tenant or their property could be denied. Call your insurance company and ask specifically about room rental coverage before a tenant moves in.
In many cases you can add a rental endorsement, sometimes called a rider, to your existing homeowners policy rather than buying a separate landlord policy. The endorsement extends liability coverage to tenant-related incidents and may cost less than a standalone policy. For a long-term tenant, some insurers will require a full landlord policy instead. Either way, set your liability limits high enough to protect your assets if a tenant or their guest is injured on the property. Requiring the tenant to carry renter’s insurance is a smart move too. It covers their personal belongings and gives them their own liability protection, keeping those claims off your policy.
Write a Lease Built for Shared Living
A standard apartment lease does not account for sharing a kitchen and hallway with your landlord. Your lease has to address both the financial terms and the practical boundaries of cohabitation.
Define Spaces and Financial Terms
Spell out exactly which areas are for the tenant’s exclusive use, such as a specific bedroom and bathroom, and which areas are shared. List the kitchen, laundry room, living room, and any outdoor space with clear rules about access and cleanup. Ambiguity here is where most shared-living arrangements fall apart.
Put the rent amount, due date, accepted payment methods, and late fee structure in writing. Roughly half of states cap the security deposit a landlord can collect, typically at one or two months’ rent. Even where there is no cap, keeping the deposit reasonable helps attract tenants and reduces disputes. Document the deposit amount in the lease and note where the funds will be held, since many states require the deposit to sit in a separate account.
House Rules and Termination
Living under the same roof means small annoyances escalate fast. Put rules about noise, guests, smoking, pets, parking, and shared appliance use directly into the lease so they are enforceable rather than suggestions. These are the terms most likely to matter day to day.
Include clear termination provisions: how much notice either party must give (30 days is common for month-to-month arrangements), what counts as a lease violation, and what happens when rent goes unpaid. If you ever have to evict, those written terms are the foundation of any legal action. Eviction procedures vary by state, but the process always starts with written notice and follows a timeline set by local law. Removing a tenant informally by changing the locks or shutting off utilities is illegal in every state, regardless of what the lease says.
Screen Applicants Within Legal Boundaries
Sharing your home with a stranger calls for more due diligence, not less. Start with a written rental application that collects identifying information, employment details, income, and references from previous landlords.
Running a credit check or criminal background check means following the Fair Credit Reporting Act. Under 15 U.S.C. § 1681b, you can pull a consumer report when a business transaction is initiated by the consumer, which covers a prospective tenant who submits an application to you.5Office of the Law Revision Counsel. 15 USC 1681b – Permissible Purposes of Consumer Reports You need the applicant’s written consent before ordering the report. If you deny someone based on information in the report, you must provide an adverse action notice identifying the reporting agency that supplied the data and informing the applicant of their right to dispute it. Screening services typically charge $25 to $75 per applicant, a cost many landlords pass to the applicant.
Verify income by reviewing recent pay stubs or tax returns. A common benchmark is that gross monthly income should be at least three times the rent, though you can set your own threshold as long as you apply it consistently to every applicant. Contact previous landlords and ask about payment history and how the tenant treated the property. That call catches problems that never show up on a credit report, like chronic noise complaints or unauthorized occupants.
Report the Income and Take the Deductions
Rental income from a room in your home is taxable, and the IRS expects you to report it. You can also deduct a proportional share of expenses you are already paying.
The 14-Day Rule and Where to Report
Rent the space for 15 or more days during the year and you report all the rental income you receive. Rent it for fewer than 15 days and the income is excluded from your tax return entirely, and you do not report any rental expenses either.6Internal Revenue Service. Publication 527 (2025), Residential Rental Property That rule is a genuine freebie for occasional rentals during a local event, but it does not help ongoing arrangements.
For rentals of 15 days or more, report income and deductible expenses on Schedule E (Form 1040). If you provide significant services beyond utilities and common-area maintenance, such as regular housekeeping or meals, the IRS treats the activity as a business and requires Schedule C instead.7Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040)
Allocating Expenses and Depreciation
When you rent part of your home, expenses that apply to the whole property, such as mortgage interest, property taxes, utilities, and insurance, have to be split between personal and rental use. The IRS accepts any reasonable method, and the two most common are dividing by the number of rooms or by square footage.6Internal Revenue Service. Publication 527 (2025), Residential Rental Property If the rented room is 180 square feet in an 1,800-square-foot house, 10% of shared expenses count as rental deductions.
You can also depreciate the rental portion of your home over 27.5 years using the straight-line method. The depreciable basis is the lesser of the home’s fair market value or your adjusted basis on the date you start renting, and you apply the same square-footage or room-count percentage to determine the rental share.6Internal Revenue Service. Publication 527 (2025), Residential Rental Property Depreciation is valuable during the rental years, but the IRS recaptures it when you sell, which can increase your capital gains tax. If rental expenses exceed rental income, the deduction for certain expenses may be limited, and Publication 527’s Worksheet 5-1 walks through the math.
Manage the Tenancy Like a Business
Once the lease is signed, treat it like the legal relationship it is. Your tenant living down the hall does not make record-keeping optional.
Put the security deposit in a separate account immediately. Many states require it, and even where they do not, commingling the deposit with personal funds makes it harder to account for at move-out. Do a detailed move-in inspection with the tenant present, documenting the condition of walls, flooring, fixtures, and appliances with photos and a written checklist. Both sign it. That document is your evidence if you later need to justify withholding part of the deposit for damage beyond normal wear.
Set up a consistent system for collecting rent, whether a payment app, direct transfer, or another method that creates an automatic paper trail. Avoid cash where possible; disputes over whether rent was paid are common and hard to resolve without records. For maintenance, establish a written process for how the tenant reports problems and how quickly you will respond. Urgent issues like heating failures or water leaks demand same-day or next-day attention in most jurisdictions; routine repairs allow a longer window. Keep records of every repair request, response, and expenditure. If a dispute reaches court or a tax audit, your documentation is your defense.