Grassthwaitehow is a Grade II listed building in the Lake District National Park local planning authority area, England. First listed on 15 March 1974. House.

Grassthwaitehow

WRENN ID
silver-outpost-sorrel
Grade
II
Local Planning Authority
Lake District National Park
Constituency
Westmorland and Lonsdale MP: Tim Farron (LD)
Country
England
Date first listed
15 March 1974
Type
House
Address
Grassthwaitehow, 1 and 2, Patterdale, Westmorland and Furness
OS grid reference
NY 384 159
Coordinates
54.53546, -2.95308
Source
Historic England listing

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

Description

Grassthwaitehow is a 17th-century long, low house located in Grisedale, part of the Pattersdale area. The building is constructed of stone rubble that is cement-rendered, topped with a slate roof featuring a central and end projecting chimney. It stands two storeys high and has a slate dripstone over the entire ground floor. The front of the house includes two boarded doors, four windows on the ground floor, and six windows above. Number 1 has new casements in old openings, while Number 2 retains its original 12-paned sash windows. The house is built on a boulder base, and the rear wing features old horizontal sliding sashes. An east end was added around 1706.

Local climate

Grassthwaitehow sits in one of the wettest parts of the UK, with an average of 1,440 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 94% of listed buildings.

It experiences an average of 61 freeze-thaw cycles a year, more than 98% of listed buildings. Of these, 37 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
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