Portlands is a Grade II listed building in the Sevenoaks local planning authority area, England. First listed on 22 October 1971. House. 7 related planning applications.

Portlands

WRENN ID
weathered-corbel-spindle
Grade
II
Local Planning Authority
Sevenoaks
Constituency
Sevenoaks MP: Laura Trott (Con)
Country
England
Date first listed
22 October 1971
Type
House
Address
Portlands, Cudham Lane South, Knockholt, TN14 7PA
OS grid reference
TQ 453 582
Coordinates
51.30454, 0.08389
Source
Historic England listing

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

Description

Portlands is a house dating to around 1840. The main front of the building has two storeys and three windows, and is rendered in stucco. It has a low-pitched, hipped slate roof with an overhanging eaves soffit. A projecting central bay is emphasised with a porch featuring square Ionic columns and Ionic pilasters at the angles. A moulded band runs along the first floor. The first-floor sash windows have margin lights, while the ground-floor casement windows are topped with console bracketed cornices. The side elevation has canted bays. A rear wing dates to the 18th century and is constructed of brick and flint, facing the road. Portlands forms a group with the oast house and drying shed, attached walls, stable buildings, and Portlands Cottage.

Local climate

Portlands receives an average of 750 mm of rain a year. This makes it drier than 70% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 71% of listed buildings.

It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 18 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 — 1 transaction since 2003
  • Related listed building consents — 7 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. Oast House and Drying Shed to North of Portlands and Attached Walls to South and East of Oast Grade II 30 m
  2. Stable Buildings to North East of Former Drying Shed on Portlands Estate Grade II 59 m
  3. Portlands Cottage Grade II 63 m
  4. Flint House Grade II 590 m
  5. Burlings Cottage Grade II 734 m
  6. Outhouse and Garden Wall to North of Burlings Cottage Grade II 737 m
  7. Franklow Grade II 751 m
  8. Bombers Farmhouse Grade II 933 m
  9. Brasted Hill Farm House Grade II 1.2 km
  10. Letts Green Farmhouse Grade II 1.2 km