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Get startedDellside is a detached house in Copthorne, Crawley, Crawley (RH10 3JD). It has a recorded floor area of 112 m² (around 1206 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (March 2025) shows a D (score 65), on the cusp of jumping into the C band. When first surveyed in October 2014 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Poor to Average, roof efficiency went from Very Poor to Average and window efficiency went from Average to Good. The recommended improvements would lift it to B (score 82), a 2-band jump.
One planning record on file: an extension approved in 2003. Past consents include an extension and a conservatory, meaningful when judging how the property has evolved.
Recommended upgrades on file would lift this property by multiple EPC bands.
Dellside has an approved rear extension on the planning record.
Dellside has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£597,000
Modelled from EPC, postcode comparables.
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
EPC Rating for Dellside runs comfortably ahead of the street norm.
EPC Rating
65 (D)
Street avg 54 (E)
Floor Area
112 m²
Street avg 167 m²
CO₂ Emissions
4.6 t/year
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km

Daytime· 07:00 – 23:00
46.0dB

Changes detected from historical EPC data
Heating controls changed
Roof insulation improved
More low energy lighting installed
Heating controls upgraded for better temperature management
Window efficiency improved
Cavity wall insulation installed
Roof insulation improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Extension: Rear of property
Erection of rear conservatory.
Median price across the last 5 sales in RH10 3JD: £525,000 (2022–2017).
4 Bonwick Cottages Copthorne Bank Copthorne Crawley
Sold Nov 2022
3 Bonwick Cottages Copthorne Bank Copthorne Crawley
Sold Feb 2019
The Bell House Copthorne Bank Copthorne Crawley
Sold Sept 2018
Wat Sri Intra Atula Copthorne Bank Copthorne Crawley
Sold Jul 2017
Woodside Cottage Copthorne Bank Copthorne Crawley
Sold Feb 2016
Street avg 8.4 t/year
Habitable Rooms
5 rooms
Street avg 7 rooms
RH10 3XP
Bonwicke Cottages — bus stop.
Closest school
1.1 km
Copthorne CofE Junior School. 3 schools nearby.
Night-time· 23:00 – 07:00
38.1dB