How do I search planning applications in Co. Mayo?

Two ways. The national planning applications map (nationalplanningapplications.ie) carries every council's register on one map: search the address, then look at the streets around it. The planning authority for the towns on this page is Mayo County Council; each also runs its own online planning search with the full file, drawings and decision. For a house you are buying, the 300 m around it matters more than the town count.

Which towns in Co. Mayo have the most planning activity?

By applications within 2 km of the town centre in the last three years: Westport (196), Ballina (189), Castlebar (184), Claremorris (99). Counts include extensions, one-off houses and changes of use, not only housing schemes.

Does planning permission nearby change what a house is worth?

A granted permission for a large scheme behind the house can take light, a view or parking, and it means construction traffic for two years. It can also add a school or a shop. Read the description, the decision and the appeal status before you bid. The report lists every application within 300 m of the Eircode with that detail, and checks the house's own planning and building-control file.

Planning applications · Co. Mayo

Planning applications in Co. Mayo: 668 in three years

668 planning applications were lodged within 2 km of the centres of 4 towns in Co. Mayo in the last three years, 15 of them for ten homes or more (430 units). Below: the busiest towns, the largest schemes on file, and what to check around one house before you bid.

668

planning applications within 2 km of 4 town centres in the last three years

of them for 10 homes or more

430

residential units in those large applications

Where the planning office is busiest in Co. Mayo

Applications lodged within 2 km of each town centre since 2023, from the national planning register. A high count means an active town, not necessarily housing estates: extensions, one-off rural houses, shopfronts and retention applications all count.

Westport	196 applications, 4 large
Ballina	189 applications, 1 large
Castlebar	184 applications, 7 large
Claremorris	99 applications, 3 large

Largest schemes on file in Co. Mayo

Applications for ten homes or more near the towns above, largest first, with the status recorded on the register when this page was built:

61 units, Castlebar, lodged 2025-10, application finalised (Mayo County Council): Full Planning Permission for the construction of 61 no. residential units consisting of 17 No. two storey detached houses, 24 no. two-storey semi-detached houses and 20 no. two storey terraced houses , providing for 6 no
52 units, Westport, lodged 2025-09, application finalised (Mayo County Council): The development will consist of the construction of 97 residential units consisting of: 19 detached housing units (4-bed), 33 terraced housing units (2, 3 & 4-bed), 9 own-door apartments (1 & 2-bed), 18 ground floor terr
43 units, Castlebar, lodged 2025-07, application finalised (Mayo County Council): 1. Construction of a housing development (Garryduff Park West) of 68 no. dwellings in two and three storey semi-detached and terraced houses and duplex/apartment configurations; 2. Vehicular and pedestrian/cycle access p
41 units, Castlebar, lodged 2025-06, decision made (Mayo County Council): 1. Construction of a housing development (Garryduff Park East) of 55 no. dwellings in two and three storey semi-detached and terraced houses and duplex / apartment configurations; 2. Vehicular and pedestrian/cycle access
32 units, Castlebar, lodged 2024-09, application finalised (Mayo County Council): The development will consist of: 1) Construction of a housing development with a total of 32 no. dwellings in semi-detached, detached and terrace configurations, consisting of 1no. 4-bed detached house, 3no. 3-bed detach
28 units, Claremorris, lodged 2024-09, application finalised (Mayo County Council): Construct a 31 unit housing development consisting of 6 no. 1 Bedroom Apartments, 6 no. 2 Bed Duplex Apartments, 16 no. 3 Bed Semi Detached Houses and 3 no. 4 Bed Detached Houses together with all ancillary site works an
27 units, Claremorris, lodged 2024-07, application finalised (Mayo County Council): The development will consist of: (1) Construction of a housing development with a total of 27 no. dwellings in semi-detached & detached configurations, consisting of 1 no. 4-bed detached house, 1 no. 2-bed detached house
26 units, Castlebar, lodged 2025-01, application finalised (Mayo County Council): Demolition of existing buildings and the construction of 33 no houses with access roads, connection to public services and all ancillary site works.

A permission that is granted but not yet built is invisible at a viewing. The register shows it. So does the zoning map for the fields around the house, which says what they are allowed to become.

Check one house in Co. Mayo

The area tells you the odds. The report tells you about the house.

Enter the Eircode. The free snapshot shows which of the twenty-nine checks flag up. The full report (€24.99, one house, no account) lists every planning application within 300 m of the house with status, decision and appeal, checks the property's own planning and building-control file, and shows the zoning of the land around it.

Or read the sample report first: a real house, 16 pages.

Other checks for Co. Mayo

Co. Mayo is one of the five counties in the Defective Concrete Blocks grant scheme (mica). For any house built 1990 to 2015, the report checks the scheme designation and tells you what to ask the seller about block testing.

Planning applications by town in Co. Mayo

GuidePlanning search before buying a house: the three files that matter

Questions people ask

How do I search planning applications in Co. Mayo?: Two ways. The national planning applications map (nationalplanningapplications.ie) carries every council's register on one map: search the address, then look at the streets around it. The planning authority for the towns on this page is Mayo County Council; each also runs its own online planning search with the full file, drawings and decision. For a house you are buying, the 300 m around it matters more than the town count.
Which towns in Co. Mayo have the most planning activity?: By applications within 2 km of the town centre in the last three years: Westport (196), Ballina (189), Castlebar (184), Claremorris (99). Counts include extensions, one-off houses and changes of use, not only housing schemes.
Does planning permission nearby change what a house is worth?: A granted permission for a large scheme behind the house can take light, a view or parking, and it means construction traffic for two years. It can also add a school or a shop. Read the description, the decision and the appeal status before you bid. The report lists every application within 300 m of the Eircode with that detail, and checks the house's own planning and building-control file.

Sources

National planning applications map

Area figures, compiled from public records. They describe the town or county, not any one house. The paid report checks the exact Eircode.