A multi-family home inspection checklist for a buyer purchasing an entire two- to four-unit Massachusetts property should account for more than an extra kitchen or bathroom. Duplexes, triple-deckers, and four-unit properties can have shared structure, separate or shared utilities, multiple heating systems, common stairs, tenant access, and repairs completed at different times. Organizing those details before the appointment helps the inspector observe the agreed areas and helps the buyer understand the report.
Information to gather before inspection day
- The dwelling-unit count and all unit addresses shown in the transaction documents; ask your attorney or the appropriate local official about any question of legal use.
- Which units, basements, attics, garages, utility rooms, and shared systems are included in the inspection agreement, and how access will be arranged.
- Known ages of the roof, boilers or furnaces, water heaters, and electrical upgrades.
- Whether heat, hot water, electricity, and water are separately metered.
- Locations of main shutoffs, panels, fuel storage, and shared mechanical equipment.
- Any seller disclosures, permits, repair invoices, or prior reports available to the buyer.
Map systems by unit and by shared responsibility
| Area | Questions to organize | Why it matters |
|---|---|---|
| Electrical | One service or several? Clearly identified panels and meters? | Helps identify how power is distributed and what serves common areas |
| Heating and hot water | One system serving several units or separate equipment? Where are controls? | Clarifies the number and condition of major systems |
| Plumbing | Shared supply and drainage? Visible shutoffs? Signs of leakage? | Helps trace conditions that may cross unit boundaries |
| Structure and exterior | Common foundation, porches, stairs, roof, and drainage? | These components affect the building as a whole |
| Units | Can every included kitchen, bath, bedroom, and exit be entered safely? | Locked or occupied areas can limit what is observed |
Understand the inspection boundary
Massachusetts describes a standard home inspection as a visual examination of readily accessible systems and components in residential buildings with one to four units. That general boundary does not automatically include every unit or address in a multi-unit building. Confirm all included units, shared systems, and spaces in the inspection agreement. The state's consumer fact sheet explains the visual scope, and 266 CMR 6.00 lists its requirements and limitations.
A standard inspection does not open walls, guarantee future performance, certify the legal unit count or code compliance, or replace specialized tests. It also does not provide a property valuation, rental-income analysis, or a reliable prediction of equipment's remaining life.
Plan access carefully
Ask the seller or listing representative to coordinate tenant notice, keys, safe access, and sufficient lighting well before the appointment. Access arrangements do not expand the agreed scope. The inspector must record obstructions and conditions that prevent inspection. If an included unit, attic hatch, electrical panel, or mechanical room is inaccessible, ask what remains unobserved and whether a further visit can be arranged before your decision deadline.
Review the report in layers
- Start with safety hazards and active water or structural concerns.
- Group findings by shared system and individual unit.
- Record known or visible equipment age alongside its observed condition and recommended follow-up; age alone is neither failure nor a remaining-life estimate.
- Separate maintenance items from conditions needing prompt specialist evaluation.
- Use your attorney and agent for contractual decisions and qualified trades for repair scopes and costs.
Ken Arnold's multi-family inspection service covers two-family, triple-decker, and four-unit properties, with findings organized by unit and shared building systems. Send the unit addresses and access plan when discussing the scope. Buyers comparing the process with a single-family purchase can also review the buyer inspection service.