66 and 67, Lemon Street is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 29 December 1950. Town house. 4 related planning applications.

66 and 67, Lemon Street

WRENN ID
secret-spindle-flax
Grade
II
Local Planning Authority
Cornwall
Constituency
Truro and Falmouth MP: Jayne Kirkham (Lab)
Country
England
Date first listed
29 December 1950
Type
Town house
Address
66 and 67, Lemon Street, Truro, TR1 2PN
OS grid reference
SW 825 446
Coordinates
50.26154, -5.05262
Source
Historic England listing

Also on this page: sale history · EPC · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

66 and 67 Lemon Street are a pair of town houses built in 1823 for Thomas Treloar, a merchant. The houses are constructed from dressed coursed local stone with freestone dressings, while the ground floor on the right and the upper floors are rendered. They feature a concrete tile roof with two 20th-century roof dormers and brick end stacks. The design is a double-depth plan, creating a mirror-image pair that rises three storeys plus converted attics, with an overall four-window range on the front.

The central entrance of each house consists of round-arched doorways flanked by slightly projecting ashlar pilasters. These doorways have impost cornices, moulded architraves, projecting keyblocks, and a moulded cornice, leading to six-panel doors with spoked fanlights. A plinth and first-floor sill string are present. No. 66, on the left, features rendered window surrounds, while both houses have rendered keyblocks above late 19th-century or 20th-century horned four-pane sash windows, except for possibly original sashes at the ground floor and second floor left of No. 67, which have had their intermediate glazing bars removed. The interior includes panelled window shutters, but otherwise, it has not been inspected.

Local climate

66 and 67, Lemon Street receives an average of 890 mm of rain a year. This makes it wetter than 66% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 86% of listed buildings.

It experiences an average of 6 freeze-thaw cycles a year, fewer than 96% of listed buildings. Of these, 2 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 2 transactions since 2002
  • Related listed building consents — 4 applications
  • 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. No 65 and Attached Iron Railings Grade II 6 m
  2. 64, Lemon Street Grade II 11 m
  3. 63, Lemon Street Grade II 17 m
  4. 68, Lemon Street Grade II 23 m
  5. 62, Lemon Street Grade II 25 m
  6. Nos 30 and 31 and Attached Steps and Forecourt Railings Grade II 28 m
  7. Nos 28 and 29 and Attached Forecourt Railings Grade II 30 m
  8. No 27 and Attached Forecourt Railings Grade II 33 m
  9. 32, Lemon Street Grade II 38 m
  10. 1, Fairmantle Street Grade II 40 m