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Get startedNew Mill Cottage is a three-bedroom detached house in Sidlesham, Chichester, Chichester (PO20 7LU). It has a recorded floor area of 118 m² (around 1270 sq ft), construction records dating it to 1900-1929 and council tax band F. The latest certificate (October 2023) shows a D (score 62), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since September 2010. Between certificates, roof efficiency went from Average to Good, window efficiency went from Poor to Average and lighting went from Average to Very Good; while wall efficiency dropped from Good to Poor. The recommended improvements would lift it to B (score 81), a 2-band jump.
Sale prices here have outpaced Chichester HPI: 5.8% per year against 0% for the wider region. Today's modelled estimate of £620,000 sits 77.1% above the 2015 sale of £350,000. On the market in May 2015 and unlisted since — roughly 11 years.
Recommended upgrades on file would lift this property by multiple EPC bands.
New Mill Cottage changed hands twice within eighteen months — unusual for the area.
£620,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.8% per year over 1 year.
£350,000
Growth on file: 5.8% per year over 1 year.
Price per m²
£2,966
Street avg £3,790
Floor Area
118 m²
Street avg 148 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km

Daytime· 07:00 – 23:00
45.9dB

Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Windows upgraded, improving insulation
Roof insulation improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
29 May 2015Most recent
£350,000
+6.9%over 1 year28 March 2014
£327,500
Median price across the last 5 sales in PO20 7LU: £719,900 (2025–2020).
Boskerris Mill Lane Sidlesham Chichester
Sold Jun 2025
1 Clayton Cantle Mill Lane Sidlesham Chichester
Sold Apr 2024
Dolphin House Mill Lane Sidlesham Chichester
Sold Dec 2022
Harbour House Mill Lane Sidlesham Chichester
Sold Mar 2021
Island Cottage Mill Lane Sidlesham Chichester
Sold Oct 2020
CO₂ Emissions
4.4 t/year
Street avg 5.3 t/year
PO20 7LU
Manhood Lane — bus stop.
Closest school
1.2 km
Sidlesham Primary School. 1 school nearby.
Flood risk
High
From the Environment Agency.
Night-time· 23:00 – 07:00
38.5dB
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