Imperial Mill is a Grade II listed building in the Blackburn with Darwen local planning authority area, England. First listed on 19 April 1974. Mill. 4 related planning applications.

Imperial Mill

WRENN ID
keen-baluster-cobweb
Grade
II
Local Planning Authority
Blackburn with Darwen
Constituency
Blackburn MP: Mr Adnan Hussain (Ind)
Country
England
Date first listed
19 April 1974
Type
Mill
Address
Imperial Mill, Gorse Street, BB1 3EU
OS grid reference
SD 700 286
Coordinates
53.7534, -2.45624
Source
Historic England listing

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

Description

Imperial Mill is a red brick mill, likely built in the early 20th century, around 1900. It has a dignified appearance with three and four storeys, featuring stringcourses and pilasters. The building has a long rectangular shape and is characterized by rows of large, closely spaced eight-paned windows.

An engine-house projects at a right angle, displaying six round-arched windows on its longer sides and two Gothic-traceried round-arched windows on the end facing the canal. Additionally, there is a staircase tower at the north angle, which includes grouped round-arched windows on the top floor.

Local climate

Imperial Mill sits in one of the wettest parts of the UK, with an average of 1,280 mm of rain a year. This makes it wetter than 94% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.

It experiences an average of 46 freeze-thaw cycles a year, more than 87% of listed buildings. Of these, 24 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 2023
  • 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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