Rosslyn Hill Unitarian Chapel is a Grade II listed building in the Camden local planning authority area, England. First listed on 14 May 1974. Chapel. 5 related planning applications.

Rosslyn Hill Unitarian Chapel

WRENN ID
secret-solder-hazel
Grade
II
Local Planning Authority
Camden
Constituency
Hampstead and Highgate MP: Tulip Siddiq (Lab)
Country
England
Date first listed
14 May 1974
Type
Chapel
Address
Rosslyn Hill Unitarian Chapel, NW3 1NG
OS grid reference
TQ 267 856
Coordinates
51.55541, -0.17297
Source
Historic England listing

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

Description

Rosslyn Hill Unitarian Chapel is a chapel dating from 1862, designed by John Johnson, with additions of a north aisle, chancel, and committee room in 1885 by Thomas Worthington. The chapel is built of Kentish ragstone rubble with Portland stone dressings, and has a steeply pitched slate roof topped with a fleche. It is constructed in the Gothic style, with a wide-aisled nave of seven bays and a sanctuary.

The interior features a vaulted timber roof and a gallery at the west end. There are two plaster relief panels in the chancel, thought to be the work of John Flaxman. The chapel contains a significant collection of 19th-century stained glass with geometrical tracery, created by Morris and Co and other firms including Burne Jones, Henry Holiday, Clayton & Bell, Wilson & Hammond, Lavers & Westlake, and Mayer & Co of Munich. A number of memorials are present, including one dedicated to the artist Helen Allingham.

Local climate

Rosslyn Hill Unitarian Chapel sits in one of the driest parts of the UK, with an average of 690 mm of rain a year. This makes it drier than 98% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 98% of listed buildings.

It experiences an average of 30 freeze-thaw cycles a year, fewer than 66% 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.
  • Sale history — 7 transactions since 1999
  • Related listed building consents — 5 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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  4. Sidney House Grade II 51 m
  5. Cossey Cottage Grade II 55 m
  6. Rosslyn House Grade II 74 m
  7. 4 and 5, Downshire Hill Grade II 121 m
  8. Milestone Set in Wall Opposite Number 5 (Number 5 Not Included) Grade II 129 m
  9. 6, Downshire Hill Grade II 129 m
  10. Numbers 50 and 51 and Attached Area Walls and Balustrade Grade II 135 m