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A Massachusetts couple who missed the rental income from former two-family homes converted part of their single-family house into an accessory dwelling unit. They report spending about $55,000 on the project and collecting $1,725 per month in rent; their experience is a personal account, not a forecast for other homeowners.
A Massachusetts couple converted part of their single-family home into a one-bedroom accessory dwelling unit after realizing they missed the rental income from homes they had previously owned. The homeowner says the project cost about $55,000 and now brings in $1,725 a month; the account offers one household’s experience following a state law enacted in August 2024 to encourage ADUs.
The homeowner and his wife had spent more than a decade living in two-family homes and renting out the other unit. He said the rent made homeownership feel more financially manageable and, at one point, cut their mortgage payment in half. After saving for several years, they bought a single-family fixer-upper, but found they missed having rental income. Attempts to earn money by renting out their pool, second garage and backyard did not work out, he wrote in Family Handyman.
Rather than move or buy another property, the couple chose to convert part of their existing home into a self-contained one-bedroom apartment. They researched state and local rules, submitted plans and applied for a building permit. The homeowner said the project did not change the home’s footprint, and that construction began in August 2024. The work was completed and inspected by December, after which the town issued a certificate of occupancy. A tenant moved in on January 1, 2025.
The homeowner reports monthly rent of $1,725, or $20,700 a year, against the project’s stated cost of about $55,000. He estimates that the rent would recover that cost in roughly two and a half years. That calculation is his estimate and does not establish a general return: the account does not detail operating expenses, taxes, maintenance, vacancy periods or financing costs.
Rental Income From an Existing Home
The account illustrates one way homeowners may add a rental unit without purchasing a separate property: adapting existing space for an independent household. For this couple, the reported rent helps restore a source of income they valued in their earlier two-family homes while allowing them to stay in their neighborhood.
But the reported figures are specific to one project, property and tenant arrangement. Upfront construction costs, local rents, permit requirements, utility work and ongoing landlord responsibilities can vary widely. The homeowner also said an electrical panel upgrade was needed, a reminder that the initial project budget may not be the only cost to assess. Prospective owners would need to evaluate their own finances and local rules rather than assume the same payback period.
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From Two-Family Homes to an ADU
The couple first bought a two-family home after about 10 years of renting, choosing it because rent from the second unit made the purchase feel more affordable. Seven years later, they moved to another two-family home and kept the first property. After five more years of working and saving, they bought a single-family fixer-upper, which they saw as the next step for their family.
In August 2024, Massachusetts enacted a law intended to encourage accessory dwelling units as part of efforts to address the state’s housing shortage. ADUs are smaller, separate living spaces with facilities such as a kitchen and bathroom; they can be used by relatives or rented to tenants. The couple’s project involved converting existing space rather than expanding the home’s footprint. The homeowner says the local permitting and inspection process went smoothly, but that experience does not establish how the process works in other towns or for different designs.
“Collecting that first rent check was an amazing feeling, and it cut our mortgage payment in half.”
— The homeowner, writing in Family Handyman
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Costs and Rules Vary by Property
The account does not identify the town, provide a detailed breakdown of the $55,000 project cost or specify whether the reported rent is before or after expenses. It also does not describe insurance, taxes, utilities, maintenance, vacancy or any changes in rent over time. Those details are needed to judge the unit’s net financial return.
Local zoning, building codes, permit requirements and the suitability of an existing home can differ. The homeowner says the project went smoothly because it did not alter the building footprint, but the report does not establish that other ADUs would face the same process. The couple’s positive experience with tenants is also personal; future tenant relationships and landlord obligations remain uncertain.
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Tenanting and Ongoing Returns
The unit is occupied, and the homeowner says the rental income continues to support the family’s monthly budget. The source report does not give a future construction or policy milestone, nor does it provide later figures for expenses or net income. The next measure of the project’s financial performance will depend on ongoing rent, costs and occupancy over time.
For homeowners considering a similar conversion, the account points to practical next steps: check state and municipal rules, estimate costs against realistic local rents, consider privacy and landlord responsibilities, and consult an electrician early about capacity and possible upgrades. Any project should proceed through applicable permitting, inspections and code requirements.
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Key Questions
How much did the homeowner say the ADU cost?
He reported a project cost of about $55,000. The report does not provide a detailed breakdown of that amount.
How much rent does the ADU bring in?
The homeowner says the unit rents for $1,725 a month, or $20,700 a year. The account does not clarify how much remains after expenses.
When did the tenant move in?
The homeowner says the town inspected the completed project and issued a certificate of occupancy in December 2024. The first tenant moved in on January 1, 2025.
Does the project show that an ADU will pay for itself in two and a half years?
No. That is the homeowner’s estimate based on the reported project cost and rent. Actual payback depends on expenses, vacancies, financing, taxes, maintenance and local conditions, which the account does not fully detail.
What should homeowners check before adding an ADU?
The homeowner recommends checking local and state rules, reviewing costs and potential income, planning for privacy, and consulting an electrician early. Permit, inspection and building-code requirements depend on the project and location.
Source: rss
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