How to Find Property Lines in Massachusetts
Massachusetts has more resources for property research than most states. Between the state parcel viewer, 21 Registry of Deeds districts, the Land Court, and detailed town and county GIS systems, you can do meaningful research before ever calling a surveyor. This guide walks through each resource, explains what it can and cannot tell you, and identifies when you need to stop researching and hire a licensed professional.
Start with MassGIS: The State Parcel Layer
MassGIS maintains the Massachusetts parcel layer, available through the state's official parcel viewer at mass.gov/parcel-map. This is the best free starting point for any property line research in Massachusetts. The viewer shows:
- Property boundaries for most parcels across all 351 cities and towns.
- Parcel attributes including owner name, lot size, and assessed value in many towns.
- Overlay options including aerial imagery, roads, wetlands, and FEMA flood zones.
The MassGIS parcel layer is compiled from town assessor data and updated regularly. It gives you a clear visual picture of your lot's shape, size, and relationship to neighboring parcels. It is the right first step for understanding your property's general footprint.
One important limitation: MassGIS parcel boundaries are not survey-grade. They are compiled from recorded plans and assessor data using GIS methods that introduce positional errors. In many parts of Massachusetts, parcel lines on MassGIS are off by several feet relative to the actual legal boundary. In older urban neighborhoods with complex deed histories, the error can be larger. Use MassGIS to understand your lot's shape and orientation. Do not use it to decide where to place a fence or determine whether a structure crosses a property line.
Massachusetts Registry of Deeds: The Legal Record
The Massachusetts Registry of Deeds is the authoritative public record for recorded land property boundaries. Deeds, survey plans, and subdivision plats filed at the registry define the legal boundaries of most properties in the state. Here is where to find your records:
Key Registry of Deeds Districts
| County | Registry District | Location |
|---|---|---|
| Middlesex | Middlesex South Registry | Cambridge |
| Middlesex | Middlesex North Registry | Lowell |
| Essex | Essex South Registry | Salem |
| Essex | Essex North Registry | Lawrence |
| Suffolk | Suffolk Registry | Boston |
| Worcester | Worcester Registry | Worcester |
| Norfolk | Norfolk Registry | Dedham |
| Plymouth | Plymouth Registry | Plymouth |
| Bristol | Bristol South Registry | Fall River |
| Bristol | Bristol North Registry | Taunton |
| Hampden | Hampden Registry | Springfield |
Most Massachusetts registries offer online search portals where you can search by name, address, or book and page number. Some have free access; others charge a small fee for document images. Your deed will reference the registry where it was recorded, typically listed in your closing documents or on your property tax bill.
What to look for at the Registry of Deeds:
- Your deed: Contains the metes-and-bounds description or reference to a recorded plan that defines your property lines.
- Prior survey plans: If a licensed PLS has surveyed your property before, a plan was likely filed at the registry. These plans show dimensions, bearings, and monument types for each boundary line.
- Subdivision plans: If your lot was created as part of a larger subdivision, the subdivision plan on file defines every lot in the development.
- Easements and rights of way: Recorded easements affecting your property are documented here.
Massachusetts Land Court: Registered Land Parcels
If your property is Registered Land, your documents are at the Massachusetts Land Court in Boston, not the local Registry of Deeds. The Land Court maintains a certificate of title for each registered parcel. Your closing documents will tell you if your property is Registered Land; look for a certificate number or a reference to the Land Court.
The Land Court's online system allows you to search for Registered Land documents. You can request copies of the certificate of title and any filed plans. Registered Land plans tend to be extremely accurate, since they were reviewed and accepted by the court as part of the registration or subsequent modification process.
Town Assessor and Municipal GIS Portals
Every Massachusetts city and town maintains an assessor's database with parcel data. Many have their own GIS portals that go beyond what MassGIS provides, including:
- Detailed parcel attributes with lot dimensions, building footprints, and assessment data.
- Zoning overlays showing how your parcel is classified.
- Historical permit records in some towns.
- Aerial imagery updated more frequently than the state layer.
Popular GIS platforms used by Massachusetts municipalities include ArcGIS Online, ESRI, and various vendor-specific systems. You can usually find your town's GIS portal by searching for your town name plus “parcel viewer” or “GIS maps.”
These assessor maps carry the same legal disclaimer as MassGIS: they are reference tools, not survey-grade boundary determinations. They are, however, often more detailed and more current than the statewide layer, and worth consulting for additional context.
Finding Physical Monuments on Your Property
Most Massachusetts residential properties have physical monuments at the corners. Common types include:
- Iron pins: Half-inch or five-eighths-inch iron rods driven into the ground. Usually at the top of the soil or just below it. A metal detector helps locate buried pins.
- Concrete bounds: Four-inch square concrete markers, sometimes with a drilled hole or copper pin at the center.
- Stone bounds: Granite or fieldstone markers used in 19th-century and earlier surveys. Still found in older neighborhoods and rural areas.
- Drill holes in granite: Common in urban Boston and other cities where drilling into existing stone or curbing was used to mark corners.
Locating monuments yourself is possible and gives you a starting point for understanding your lot. But physically finding an iron pin does not mean you have a legally certified boundary determination. Pins can be moved, disturbed by construction, or placed in the wrong location by a prior owner. Only a licensed PLS can verify that a monument is in its correct location relative to the deed description.
When to Hire a Surveyor Instead of Researching Further
Self-research using MassGIS, the Registry of Deeds, and your deed is appropriate for general understanding and context. Hire a licensed Massachusetts PLS when:
- You are planning to build a fence, wall, addition, or other structure near a property line.
- You have an active boundary dispute with a neighbor.
- You are buying property and want certainty about the boundaries before closing.
- Your deed or prior survey plans show discrepancies that you cannot reconcile.
- You are in a coastal or wetland area where setbacks from property lines are subject to regulation.
- You cannot locate existing monuments on the ground and need them established.
A licensed PLS does what you cannot do yourself: research the full deed chain, field-verify monuments, reconcile discrepancies between recorded plans and physical conditions, and produce a legally binding survey plan that can be recorded at the Registry of Deeds or filed with the Land Court.
Find a Licensed Surveyor in Massachusetts
Our directory lists 184 licensed land surveying firms across Massachusetts, organized by county. Whether you are doing preliminary research on a property purchase, resolving a neighbor dispute, or need a survey plan recorded before a construction project, you can find licensed surveyors near you. Browse the Massachusetts surveyor directory to compare firms and request quotes.