18, Colegate is a Grade II* listed building in the Norwich local planning authority area, England. First listed on 26 February 1954. Office. 2 related planning applications.

18, Colegate

WRENN ID
silver-rotunda-mist
Grade
II*
Local Planning Authority
Norwich
Constituency
Norwich South MP: Clive Lewis (Lab)
Country
England
Date first listed
26 February 1954
Type
Office
Address
18, Colegate, NR3 1BQ
OS grid reference
TG 231 090
Coordinates
52.63316, 1.29575
Source
Historic England listing

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

Description

No. 18 Colegate is a former house, now used as offices, dating from the early 18th century. The building is constructed of red brick, featuring stucco rusticated quoins and a stringcourse, with flint incorporated into part of the west wall. It has a pantile roof and stands two storeys high, plus a half-basement and attics, with a total of seven bays.

The central entrance has a doorcase with a moulded semi-circular head, flanked by two fluted composite half columns, topped with a pediment and a keystone shaped like a tern. There are five steps leading up to the entrance. The building has sash windows throughout, which include glazing bars and rubbed brick flat arches with keystones. Notably, there are two small 17th-century windows on the first floor of the west wall.

The eaves cornice is ornate, featuring modillions, and there is a central dormer gable with two sash windows, along with small flanking dormers. The roof has an unusual arrangement, with one ridge running parallel to the street line and three ridges at right angles at the rear.

Inside, there are good 18th-century details, particularly in the south-west room, which boasts a fine plaster ceiling with a central oval panel set within a guilloche frame, surrounded by a wide enclosing frame with corner rosettes.

Local climate

18, Colegate sits in a drier-than-average part of the UK, with an average of 710 mm of rain a year. This makes it drier than 88% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 95% of listed buildings.

It experiences an average of 24 freeze-thaw cycles a year, fewer than 75% of listed buildings. Of these, 13 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.
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  • Related listed building consents — 2 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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