Older, solid-walled homes
23% of the housing stock in these neighbourhoods dates from before 1919 and 22% from before 1900. Expect solid walls rather than cavities, so damp diagnosis needs care: cement renders, plastic paints and raised ground levels trap moisture in walls that were designed to breathe.
Source: VOA, Mar 2025
Listed buildings
Historic England lists 49 buildings in and around Ottery St Mary, including Church Of St Mary (Grade I); Colby House (Grade II*); The Chanter'S House (Grade II*). On a listed home, like-for-like repairs with traditional materials are the rule; your surveyor should flag anything that looks unconsented.
List entries: Church Of St Mary · Colby House · The Chanter'S House
Source: Historic England
Conservation area
Conservation area here: Ottery St Mary. If you plan changes, check with the council first: conservation area rules limit what you can do without permission.
Source: planning.data.gov.uk
Flood risk (rivers and sea)
13 of the 69 postcodes we checked (postcodes where homes sold in 2025) have their centre in Environment Agency Flood Zone 2 or 3, and 8 in Zone 3. Ask the seller about any past flooding and check insurance costs before you exchange.
Source: Environment Agency
Radon
The radon map square at the centre of Ottery St Mary is class 1 (under 1% of homes above the Action Level), though 3% of the sold postcodes we checked are in an Affected Area.
Source: UKHSA/BGS
Ground and building stone
Under most of Ottery St Mary the bedrock is interbedded sandstone and conglomerate (100%). In Devon, older homes on this ground are often cob (earth walls) or local stone; cob must stay dry, so look hard at renders, gutters and ground levels.
Source: BGS 625k
Ground stability
The BGS GeoSure 5 km hexagon covering Ottery St Mary shows moderate slope instability (landslides) potential. That's a broad screen, not a site assessment; look for cracking, sticking doors and leaning walls.
Source: BGS GeoSure