Chymder House is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 24 March 1950. Town house.

Chymder House

WRENN ID
riven-nave-hazel
Grade
II
Local Planning Authority
Cornwall
Constituency
St Ives MP: Andrew George (LD)
Country
England
Date first listed
24 March 1950
Type
Town house
Address
Chymder House, 43, Coinagehall Street, Helston
OS grid reference
SW 657 274
Coordinates
50.10062, -5.2771
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Chymder House is a town house dating from the early to mid 19th century. It features a stucco exterior, likely over rubble, with a moulded plinth and fluted end pilasters that are richly decorated. The building has egg and dart enriched moulded architraves with fleur-de-lis keyblocks, ground-floor sill brackets, a carved first-floor sill string, and a moulded eaves cornice beneath projecting eaves that have a panelled soffit. The roof is a hipped design covered with grouted scantle slate, and it has a brick stack on the left and a rendered axial stack towards the right. The gutters are made of cast iron and feature relief decoration.

The house has a double-depth plan and stands two storeys tall with a regular three-window front. It retains original 12-pane hornless sash windows. The entrance features an enriched panelled doorway with carved consoles, a moulded and crested hood, and a carved frieze above a name plaque, positioned centrally to the window on the left. The right-hand return has a three-bay arrangement with blind windows on the left, a central round-arched stair window with coloured margin panes above a 12-pane sash, and a similar sash above the doorway at the far right, which mirrors the front doorway but includes a keyblock.

The other elevations of the building are also complete and display similar detailing. The interior has not been inspected but is likely to retain original features that reflect the high quality of the exterior. Chymder House is a richly detailed front that makes a significant contribution to an exceptionally fine street.

Local climate

Chymder House receives an average of 870 mm of rain a year. This makes it wetter than 63% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.

It experiences an average of 3 freeze-thaw cycles a year, fewer than 99% of listed buildings. Of these, 1 follows at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. 49, Coinagehall Street Grade II 24 m
  2. Nos 1 to 7 and Attached Railings to Front of No 5 Grade II 26 m
  3. 52, Coinagehall Street Grade II 28 m
  4. 54 and 56, Coinagehall Street Grade II 29 m
  5. 35, Coinagehall Street Grade II 30 m
  6. No 8 and Attached Coach House Grade II 37 m
  7. 51, Coinagehall Street Grade II 38 m
  8. The Blue Anchor Inn Grade II 39 m
  9. No 58 and Attached Walls Grade II* 40 m
  10. Chapel Row Grade II 44 m