25 Cassiobury Drive, Watford, WD17 3AA
About 25 Cassiobury Drive
25 Cassiobury Drive is a four-bedroom detached house in Watford (WD17 3AA). It has a recorded floor area of 133 m² (around 1427 sq ft), construction records dating it to 1900-1929 and council tax band G. The latest certificate (March 2010) shows an E (score 40), well below the UK norm with real room to improve. The latest certificate is from March 2010, so improvements made since then won't be reflected. Records show the property has been extended at some point in its history.
Held since September 2010 — that's 16 years off the open market, well above the local norm. Across 1999–2010, sale prices on this property compounded at 6.3% per year. Today's modelled estimate of £1,037,000 sits 70% above the 2010 sale of £610,000. On a £-per-square-foot basis, the last sale (£427/sq ft) was about 27.2% above the typical sold price in the postcode. 2 planning records sit against the property, 0 approved, 0 refused. At 133 m² it's 18.7% smaller than the typical home in the postcode (163 m² median across 16 EPCs).
What this property has
Inside
- Bedrooms4
- Dining roomYes
- EnsuiteYes
Outside
- Private gardenRear
- GarageDouble
Building
- Previously extendedYes
- RefurbishedYes
Energy performance
25 Cassiobury Drive's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 29 Mar 2020
EPC Rating
Planning history
- Jun 2022OutbuildingFullIn report
Retrospective application to retain garden outbuilding (games room)
Retrospective- Documents
- 8 docs on file
- Reference
- 22/00524/FULH
- Aug 2015PorchFullIn report
Extension: Single storey · Side and rear of property
Demolition of existing garage and erection of single storey side and rear extension and front porch (AMENDED PLANS AND AMENDED DESCRIPTION)
Extension- Documents
- 24 docs on file
- Reference
- 15/00822/FULH
We flagged 1 thing worth checking at 25 Cassiobury Drive
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
25 Cassiobury Drive's estimated value is more than triple its earliest registered sale price (1999).
£1,037,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.3% per year over 11 years.
£610,000
Growth on file: 6.3% per year over 11 years.
Sales timeline
30 September 2010Most recent
£610,000
+93.7%over 10 years26 November 1999
£315,000
Median price across the last 5 sales in WD17 3AA: £975,000 (2025–2019).
Nearby sales in WD17 3AA
13 Cassiobury Drive, Watford, WD17 3AA
Sold Sept 2025
£975,00029 Cassiobury Drive, Watford, WD17 3AA
Sold Apr 2024
£1,021,00021 Cassiobury Drive, Watford, WD17 3AA
Sold Nov 2022
£850,00019 Cassiobury Drive, Watford, WD17 3AA
Sold Dec 2020
£1,410,00039 Cassiobury Drive, Watford, WD17 3AA
Sold Sept 2019
£974,500
Versus other Cassiobury Drive homes
On epc rating, 25 Cassiobury Drive runs well behind the street norm.
Price per m²
£4,601
Street avg £5,368
Floor Area
133 m²
Street avg 172 m²
Habitable Rooms
7 rooms
Street avg 7 rooms
CO₂ Emissions
7.7 t/year
Street avg 7.5 t/year
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
10/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Cassiobury Park Avenue — bus stop.
Closest school
0.2 km
West Herts College. 35 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
52.4dB

Night-time· 23:00 – 07:00
43.3dB








