Country House Colegate Horsham. Main house extensive refurbishment with 2 low energy glass and steel extensions, indoor 17 x 5m swimming pool with gym, plant room with Menerga AHU and twin ASHPs.

7 bedroom early 19th Century Country House in dressed Sussex Sandstone with later additions. Country Estate of 184 acres at Colegate near Horsham set high on a sandstone ridge above Hawkins Pond on Hammerpond Lane with distant views to the South Downs.

3 separate phases of construction 2018 / 2022.


Phase 1 2017/2018 substantial refurbishment and renovation of main house including all new statutory and internal services, heating and services installation with solar array, new bathrooms, Approx value £1.0M


Phase 2 2018-20 Demolition of substandard service wings. Large contemporary steel and timber framed extension comprising new glass garden staircase, new roof terrace, double height family room, extension to existing east range to form guest bedroom & bathroom, enlargement of existing kitchen to form new kitchen & dining room with a glazed arcade as promenade/vista linking the south view and new garden entrance from the drive with changing/boot room, shower room, dog room. Hard and soft landscaping. Rendered west elevations to match house with fully glazed elevations to the east and south (garden) sides with extensive hard and soft landscaping.

Contract value £2.2M with completion July 2020


Phase 3 2019/21 Construction commenced on site July 2020. New Air Conditioned indoor natural swimming pool 17m x 5m, gymnasium, 2 storey plant room and separate ASHP Plant Room, fully glazed arcade extension continued from Phase 2 arcade. Twin commercial grade ASHPs with air conditioning and LPHW underfloor heating. 30 no PV panels (9.9kW) sited on roof to supplement ASHP demand. with battery back up. Landscaping scheme extended to suit.

Contract value £2.29M with completion February 2022

Main Contractor: Comber & Sons Ltd

Structural Engineers: Ellis Structures Ltd

Mechanical Services: RDJ Consultants Ltd

Electrical Design Services: ICFM Ltd

Electrical Installation: Sussex Electrical Ltd

Electrical Services Consultant ICFM Ltd

Heating Services : Adept Heating Services Ltd (Phase 1 only)

Mechanical Services Contractor: BTU (Installation & Maintenance) Ltd

Pool Contractor: Clearwater Revival Ltd

Doors and Windows: IQ Glass Ltd

Landscape Contractor: Twig Ltd

Topographical Surveys MJ Zara Associates

main house drive elevation
north elevation later flat roofed east wing to left and attached service range

Completed House and Grounds 2023

View of extension at practical completion February 2022
roof plan
south view of main house and extension
view from north east
view from north, pool hall & ASHPs in foreground
3D drawings of new floating staircase

east view

garden staircase and terrace breakfast area
garden staircase
flush soffit detailing
floating staircase with oak treads
glazed arcade/gallery linking to family room and swimming pool Hall
arcade/gallery glazed link across the scheme
garden entrance from main drive to garden
family room with pool hall beyond
view to south from family room
breakfast room view to Cissbury Ring through glass of garden stairwell
kitchen
pool terrace
pool hall terrace
glass encased floating staircase view from end of main house entrance hall
phase 2 arcade gallery leading to glass stairwell
main house entrance with glass incision into existing masonry
view from within main house entrance hall towards new kitchen
we kept all the lead and cast iron downpipes
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