Nos 18 and 20 Including Carriage House to Rear is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 22 May 1972. Town houses.

Nos 18 and 20 Including Carriage House to Rear

WRENN ID
quartered-porch-peregrine
Grade
II
Local Planning Authority
Cornwall
Constituency
St Ives MP: Andrew George (LD)
Country
England
Date first listed
22 May 1972
Type
Town houses
Address
Nos 18 and 20 Including Carriage House to Rear, Coinagehall Street, Helston
OS grid reference
SW 658 274
Coordinates
50.10062, -5.27509
Source
Historic England listing

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

Description

Nos. 18 and 20, including the carriage house to the rear, are two townhouses with later shops, dating from the early to late 19th century. The front is finished in stucco on studwork, featuring a quoin strip on the left, sill brackets, and moulded architraves around the original windows. There are brackets supporting the fascia board, and the roofs are covered with grouted scantle slate. A brick stack is located on the left side. The building has a U-shaped plan with narrow wings at the rear and stands three storeys tall with a four-window range. The original windows are four-pane hornless sashes, except for two late 19th-century oriel windows on the first floor of No. 20, which have pilasters, a moulded entablature, and horned sashes.

On the ground floor, there is a carriage entrance on the left, and a late 19th-century full-width moulded entablature with end consoles frames two late 20th-century altered shop fronts: a larger shop front on the right and a smaller one on the left with a doorway to its left. The rear wing of No. 18 is slate-hung on part of the upper storeys and contains two original 12-pane hornless sashes and two 20-pane fixed lights. The carriage house to the left has weather-boarded upper floors, with two original 10-pane horizontal-sliding sashes on each floor and a former loading doorway on the first floor to the left, which has a 15-pane hornless sash. The ground floor features two wide doorways: a mid-20th-century sliding doorway on the left and three late 19th-century boarded doors on the right. The rear wings and carriage house are well-preserved and are significant elements of this property.

Local climate

Nos 18 and 20 Including Carriage House to Rear 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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  2. 24 and 26, Coinagehall Street Grade II 20 m
  3. Angel Hotel Grade II 20 m
  4. 5 and 7, Coinagehall Street Grade II 32 m
  5. Nos 12 and 14 and House at Rear of No 14 Grade II 34 m
  6. 9 and 11, Coinagehall Street Grade II 36 m
  7. 13, Coinagehall Street Grade II 37 m
  8. No 15 and Attached Railings Grade II 38 m
  9. 3, Coinagehall Street Grade II 38 m
  10. 1, Coinagehall Street Grade II 44 m