Is the property in a conservation area? Check instantly via API
Check if a UK property falls within a conservation area, the single most common planning constraint question. ~10,000 conservation areas from Historic England with polygon boundaries. Point-in-polygon containment check plus radius search.
Included for every account: pay as you go, 100 tokens = £1.
Two endpoints, one question answered
The list endpoint finds conservation areas near a postcode and tells you instantly whether the postcode itself is inside one. The check endpoint takes a lat/lng for precise point-in-polygon containment.
GET /conservation-areas/
Radius search by postcode. Returns nearby conservation areas + automatic containment check for the postcode centroid.
GET /conservation-areas/check/
Point-in-polygon check. Pass lat & lng: get a boolean answer plus the containing area's details.
curl "https://api.homedata.co.uk/conservation-areas/?postcode=BA11QE&radius_km=2" \
-H "Authorization: Api-Key YOUR_KEY"{
"postcode": "BA1 1QE",
"radius_km": 2,
"in_conservation_area": true,
"containing_area": {
"reference": "CA-1234",
"name": "Bath City Centre Conservation Area",
"local_authority": "Bath and North East Somerset"
},
"total": 3,
"results": [
{
"reference": "CA-1234",
"name": "Bath City Centre Conservation Area",
"local_authority": "Bath and North East Somerset",
"area_hectares": 425.6,
"date_designated": "1969-07-15",
"distance_km": 0.0
}
]
}Query parameters
GET /conservation-areas/
| Parameter | Required | Default | Description |
|---|---|---|---|
| postcode | Yes | – | UK postcode |
| radius_km | No | 2.0 | Search radius in km (max: 10.0) |
| limit | No | 20 | Results per request (max: 50) |
GET /conservation-areas/check/
| Parameter | Required | Description |
|---|---|---|
| lat | Yes | Latitude (float) |
| lng | Yes | Longitude (float) |
The conveyancer's best friend
Conveyancing searches
Automate the "is this property in a conservation area?" check. The #1 planning constraint question in residential transactions.
Planning applications
Conservation area status triggers Article 4 directions, restricts permitted development rights, and requires additional design considerations.
Property reports
Show conservation area status and nearby areas on property reports. Polygon boundaries enable map overlays too.
Conservation area data, instantly
10,000+ areas with polygon boundaries. Point-in-polygon containment check. Radius search.
Related data & guides
Conservation areas dataset →
Full dataset overview: 9,800+ Historic England designated areas, coverage, update frequency, and use cases.
All property Data →
Browse all property datasets available through the Homedata API platform.
Planning permission Data →
Current and historic planning applications, conservation area status is a key planning constraint.