Forest Grange is a Grade II listed building in the Horsham local planning authority area, England. First listed on 24 February 1992. Large house, private school. 8 related planning applications.
Forest Grange
- WRENN ID
- lesser-tallow-fern
- Grade
- II
- Local Planning Authority
- Horsham
- Constituency
- Horsham MP: John Milne (LD)
- Country
- England
- Date first listed
- 24 February 1992
- Type
- Large house, private school
- Address
- Forest Grange, Forest Road, Colgate, RH12 4TG
- OS grid reference
- TQ 213 317
- Coordinates
- 51.07203, -0.26949
- Source
- Historic England listing
Description
Forest Grange is a large house, built in 1913 and likely designed by J P McGraw, a civil engineer. It was subsequently used as a private school. The house is constructed in a Jacobean style, using red brick in English bond with Bath stone dressings, a Horsham stone slab roof, and clustered brick chimney stacks. It is an asymmetrical building, roughly L-shaped, with two storeys and attics, and irregular window placement.
The front entrance features central and right-end projecting gables with kneelers and ball finials. There are three clustered brick chimney stacks and four flat-roofed dormers. The right-end gable has a mullioned window with a transom. The central gable contains a four-centred arched doorway with side lights, and above it, a stone panel depicting a shield held by dragons representing Saint Leonards’s Forest. The L-wing forms a service wing and has two projecting gables to its left end, two flat-roofed dormers, and mullioned windows.
The garden front is characterized by three projecting gables, each with a two-storey, eleven-light canted bay window with mullioned windows on the first floor and mullioned and transomed windows on the ground floor. There are also four other windows, mostly three-light mullions on the first floor and three-light mullioned and transomed windows on the ground floor, with a two-storey, four-light oriel window to the right of the central gable. A large external brick chimney stack with clustered brick stacks sits between the left and central gables. An attached, one-story outbuilding extends from the right-hand end, predominantly weatherboarded on a brick plinth, with a Horsham slab roof and continuous casements.
The Great Hall is panelled throughout with oak plank and muntin panelling, with spine beams and ceiling joists featuring run-out stops. The fireplace has deep wooden cornices and two Atlantes, likely reused figures from the 17th century. The former Library is also panelled up to ceiling height, with a wooden bolection-moulded fireplace. The Dining Room is executed in the Adam style, with fluted pilasters, a plastered ceiling and wall panels, and a wooden fireplace featuring a panel of six cupids and a frieze of tripods, urns, and swags. The Staircase Hall boasts an Oak Imperial staircase with strapwork embellished balusters and end piers. A large Dining Room features panelled walls, an early Georgian style oval ceiling with plaster cherubs, and a stone four-centred fireplace. One principal bedroom contains built-in walnut furniture. The bathrooms have old baths and tiled surrounds while some bedrooms have wooden fireplaces with tiled surrounds.
Local climate
Forest Grange receives an average of 740 mm of rain a year. This makes it drier than 73% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 53% of listed buildings.
It experiences an average of 31 freeze-thaw cycles a year, fewer than 62% 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 — 33 transactions since 1995
- Related listed building consents — 8 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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