North Boundary Wall of Number 20 is a Grade II* listed building in the Greenwich local planning authority area, England. First listed on 8 June 1973. A C16 Boundary wall.

North Boundary Wall of Number 20

WRENN ID
little-stronghold-blackthorn
Grade
II*
Local Planning Authority
Greenwich
Constituency
Eltham and Chislehurst MP: Clive Efford (Lab)
Country
England
Date first listed
8 June 1973
Type
Boundary wall
Address
North Boundary Wall of Number 20, Court Road Se9
OS grid reference
TQ 426 741
Coordinates
51.44802, 0.05145
Source
Historic England listing

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

Description

The north boundary wall of Number 20 is an early 16th-century, very high red brick wall featuring a sloped coping. It is part of the surrounding walls of the former Tilt Yard located in the outer grounds of Eltham Palace.

Local climate

North Boundary Wall of Number 20 sits in a drier-than-average part of the UK, with an average of 720 mm of rain a year. This makes it drier than 83% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 86% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 59% of listed buildings. Of these, 15 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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  • Detailed attributes — period, style, materials, features
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  • 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. North Boundary Wall, Entrance Gateway and Spur Wall with Gateway in Grounds to North of House Called the Tilt Yard Grade I 40 m
  2. Walls to North of Front Garden of Bramber House and Along Road Front Grade II* 122 m
  3. Stretch of Old Wall Running East from South East Angle of Gate House Garden Grade II* 122 m
  4. North Boundary Wall of Number 34 Grade II 130 m
  5. Walls Surrounding Garden of the Gate House Grade II* 136 m
  6. Wall Along Frontage of Numbers 32 and 32a, and Along North Boundary of Garden from Front to Rear Grade II* 159 m
  7. 32 and 32a, Court Yard SE9 Grade II* 167 m
  8. Piece of Wall to East of North End of North Bridge Over Eltham Palace Moat Grade II 170 m
  9. Old Brick Wall Between Gardens in Front of Numbers 34 and 36 and Along Road Frontage of These Houses Grade II* 171 m
  10. 34, 36 and 38, Court Yard SE9 Grade II* 176 m