Incline and Drumhouses is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 4 November 1999. Drumhouses.

Incline and Drumhouses

WRENN ID
spare-kitchen-rowan
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
4 November 1999
Type
Drumhouses
Address
Incline and Drumhouses, Gilfach Ddu, Caernarfon, Llanddeiniolen
OS grid reference
SH 585 605
Coordinates
53.12343, -4.11529
Source
Cadw listing

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

Description

The incline and drumhouses are a Grade II listed structure featuring an incline that runs in five tandem pitches. The lower three pitches, including a section reconstructed by the Slate Museum, have much of the track and gear still intact. There are four unrestored drumhouses made of rubblestone and slate slabs, each topped with gable-ended slate roofs. All drumhouses retain their brake-drums and cabling, with the brake mechanisms on the lower inclines constructed from massive cast iron. These mechanisms are operated using spur gears and "ship's wheel" controls, which include elaborate remote control crimp sprags. Additionally, there is a double drumhouse located at the top level.

Local climate

Incline and Drumhouses sits in one of the wettest parts of the UK, with an average of 1,360 mm of rain a year. This makes it wetter than 96% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 40 freeze-thaw cycles a year, more than 78% of listed buildings. Of these, 22 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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  4. Former Hospital and boundary walls Grade II* 265 m
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