Sun House is a Grade II* listed building in the Camden local planning authority area, England. First listed on 14 May 1974. A Modern Detached house. 2 related planning applications.
Sun House
- WRENN ID
- hushed-belfry-summer
- Grade
- II*
- Local Planning Authority
- Camden
- Constituency
- Hampstead and Highgate MP: Tulip Siddiq (Lab)
- Country
- England
- Date first listed
- 14 May 1974
- Type
- Detached house
- Address
- Sun House, 9, Frognal Way, NW3 6XE
- OS grid reference
- TQ 261 855
- Coordinates
- 51.55466, -0.18134
- Source
- Historic England listing
Description
Sun House is a detached house built between 1935 and 1936 by architect Maxwell Fry. The structure features reinforced concrete walls created using wallboard shuttering and has a flat roof. It stands three storeys high with a roof terrace, situated on a steeply sloping south-facing site. The right-hand bay at the ground floor serves as the entrance and garage, while the left side includes a rear retaining wall supported by thin steel pilotis, which also hold up the first-floor continuous balcony adorned with tubular steel railings.
The first-floor windows are plate glass sliding French windows, and the balcony's right end has a projecting canopy that extends over the garage and entrance. The left end features a panel of small glazed lights in the end wall, with thin steel pilotis supporting a loggia at the second-floor level, which is now panelled. The second-floor windows, originally sliding, have been replaced with metal-framed casements. The roof terrace is enclosed by a parapet with a tubular rail balustrade and includes a projecting canopy.
The interior has not been inspected. Historically, Fry was a founding member of the MARS Group, which significantly advanced the new architecture movement in the UK, making this house a pioneering example of the Modern Movement.
Local climate
Sun House 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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- No EPC on record for this property
- No sale records on file
- Related listed building consents — 2 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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