Property lines by address
Understand your lot. See what fits. Statewide coverage in Connecticut, Maryland, Massachusetts, New Jersey, North Carolina, Rhode Island, Vermont and Virginia, plus 145 selected counties and cities in other states. The planner turns those lot lines into a project test: building footprint size, yard, and what might fit.
A free U.S. residential lot-planning tool for homeowners. Planning estimates — not a survey, title search, or construction approval.
The lot line is not scarce. County assessors, state GIS shops, and professional parcel databases already have it. What is scarce is putting the lot, the house, the yard, and a project test in one place a homeowner can open without a subscription.
MyLotFit combines several things that usually exist separately:
| Source | What it is for | What it does not do for a homeowner |
|---|---|---|
| Regrid, LightBox, CoreLogic | Professional parcel data, GIS, and underwriting workflows. | They are not backyard planning tools. You still have to decide whether a pool or a court fits. |
| County assessor and state GIS | The official lot fabric for that county or state — the same outlines we query. | Each site is different. Most stop at the parcel. Few show a usable yard or a project envelope. |
| Zillow, Redfin, listing sites | Homes for sale, photos, and estimates. | They are not a fit test for a court, deck, or parking pad on the lot you are looking at. |
| MyLotFit | A free residential planning tool: public lot line, building outline where we have one, aerial or streets, and automatic fit tests. | Not a survey, title search, or sales history. Shallower legal data — on purpose. |
Those other products are generally for professionals, data customers, or shopping for a house. MyLotFit answers a more approachable question: what is on my lot, and what might I be able to do with it? Looking up an address and running Show me what fits does not require an account.
At least 16% of Americans live in the statewide and directly documented coverage areas. That share excludes many atlas counties — including Los Angeles, Cook, Harris, Maricopa, and the New York City boroughs — so it understates reach. We will publish a complete percentage once every supported county has a non-overlapping Census count.
Before we talk about the United States in marketing copy, the coverage has to be specific. Below is the list we will stand behind: where lot outlines come from, whether a building footprint may appear, how fresh the geometry is, and how we count population. We do not publish a national “residential parcel” total. The layers we query include every parcel type the source publishes — houses, apartments, commercial, parks, and rights-of-way — and we ask them live instead of hosting a counted fabric.
We do not say we cover most U.S. metropolitan cities. Several large markets are in the atlas or a statewide fabric; several are not. The honest claim is statewide coverage in eight states, plus 145 selected counties and cities.
| State | Coverage | Lot outline | Building footprint | Source and freshness |
|---|
These places sit outside the UrbanKit parcel atlas. Each uses that county or city’s published parcel polygons.
| County or city | Lot outline | Building footprint | 2020 Census population | Source and freshness |
|---|
Supported statewide today: Connecticut; Maryland; Massachusetts; New Jersey; North Carolina; Rhode Island; Vermont; Virginia. Plus 145 selected counties and cities in other states — listed below.
In the eight statewide fabrics the list is the state, not a handful of downtowns. Boston, Charlotte, Baltimore, Newark, and Virginia Beach are included because those state fabrics cover them — not because we invented a city file.
145 U.S. counties and independent cities outside the eight statewide fabrics, from the UrbanKit parcel atlas plus our extra list. Individual lots show in the planner, not as a hosted national extract.
Los Angeles, Cook, Harris, Maricopa, King, and the New York City boroughs appear here when the atlas or our extra list has a queryable parcel layer — not because we traced them by hand.
| What you see | Kind | How we get it |
|---|---|---|
| Lot outline | Reported | Public municipal, county, or state parcel geometry, queried live. |
| Lot dimensions and area | Calculated | Measured from that outline. Not a surveyor’s closure. |
| Building footprint | Reported, where available | OpenStreetMap North America buildings. Missing footprints are common. |
| Building footprint size | Calculated | Approximate ground-level area from the OSM outline. Not interior floor area or living space. |
| Keep-back band | Estimated | A uniform 8 ft sketch envelope, not your zoning setbacks. |
| Object pads (court, pool, deck, greenhouse, parking) | Estimated | Published play or kit sizes plus the pad we actually test. |
| Show me what fits / conflicts / rotation | Calculated | Geometry tests on this lot and these buildings. Not a permit review. |
| Population formally counted (53M+) | Reported | 2020 Census counts for the eight statewide fabrics and the extra county layers named above. Atlas counties are omitted from that sum. Not 2026 estimates. |
| Residential parcel count | Not published | We do not host a national residential extract, so we will not invent a parcel total. |
If a county does not publish an unauthenticated parcel polygon API we can query, we use a sample 80 × 130 ft yard so you can still plan. Missing records do not invent a lot line.
Coverage exists so a homeowner can open an address and see the lot. The reason to keep the address is what happens next: usable yard, object envelopes, automatic placement, conflict detection, and a downloadable visual report. That combination is what assessor sites and professional parcel shops do not sell to someone who wants to know whether a pool or a court might fit. How that helps homeowners, realtors, designers, and installers.