21 Mercer Street is a Grade II listed building in the Camden local planning authority area, England. First listed on 15 January 1973. Terraced house. 3 related planning applications.
21 Mercer Street
- WRENN ID
- fallen-bracket-coral
- Grade
- II
- Local Planning Authority
- Camden
- Constituency
- Holborn and St Pancras
- Country
- England
- Date first listed
- 15 January 1973
- Type
- Terraced house
- Address
- 21 Mercer Street, 21 Mercer Street and Boundary Wall and Railings to Rear, London, WC2H 9QR
- OS grid reference
- TQ 300 810
- Coordinates
- 51.51336, -0.12662
- Source
- Historic England listing
Description
This is a late 17th-century terraced house, which was restored and partially remodelled between 1983 and 1985 by the Terry Farrell Partnership as part of the Comyn Ching Triangle regeneration project. The house is two bays wide, with the entrance located on the right.
The front elevation features a timber ground floor, painted black, and rendered and painted upper floors. The rear of the house is constructed of stock brick and has weather-boarded mansards with pantiled roofs. The rear parapet wall and railings mark the boundary between the properties and Ching Court. The new work uses materials and colours that complement the original building, creating a unifying identity while introducing a modern feel. The house includes a basement and rebuilt or added attic space. The ground floor has been restored or recreated as a shopfront by Farrell, with timber framing, alternating blind panels and two-over-four pane sash windows. A six-panel door is set to the right, all beneath a plain fascia and cornice featuring Farrell's number plate. Upper floor windows, set near flush, have segmental or cambered arches above. The first floor has six-over-six pane sashes, while the second floor has three-over-six panes. The mansard roof has casement or fixed light windows set back behind a shallow parapet.
At the rear, six-over-six pane and four-over-four pane sashes are set in exposed boxes beneath segmental brick arches; smaller windows illuminate the stairwell. The mansard has small-paned casements. The rear area is enclosed by tubular steel railings set on a moulded masonry parapet wall. A rococo timber seat, built into the wall to the rear of No 23 Mercer Street, is flanked by cherry trees, emphasizing the oriental character of aspects of Ching Court. Panels in the railings feature Farrell's reversed CC insignia (for Ching Court), and planters added by Farrell are set on the parapet wall.
The interior of the house was not inspected. Note that the rear parapet walls and railings are not shown to scale on mapping.
Local climate
21 Mercer Street 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 95% 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 35 freeze-thaw cycles a year, more than 57% of listed buildings. Of these, 16 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.
- No sale records on file
- Related listed building consents — 3 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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