39 Cassiobury Drive, Watford, WD17 3AA
About 39 Cassiobury Drive
39 Cassiobury Drive is a five-bedroom detached house in Watford (WD17 3AA). It has a recorded floor area of 149 m² (around 1604 sq ft), construction records dating it to 1930-1949 and council tax band F. The latest certificate (June 2019) shows a C (score 72). When first surveyed in November 2008 the rating was F, the property has climbed 3 bands since. Between certificates, wall efficiency went from Very Poor to Good, roof efficiency went from Very Poor to Good and window efficiency went from Poor to Good. The recommended improvements would push it to B (score 82). Other recorded features include a conservatory.
7 planning records sit against the property, 2 approved, 1 refused. Past consents include a loft conversion, meaningful when judging how the property has evolved. Its energy rating outperforms most of the postcode (better than 75% of similar EPCs). Across 1997–2019, sale prices on this property compounded at 18.8% per year. Today's modelled estimate of £1,118,000 is 14.7% above the 2019 sale price. On a £-per-square-foot basis, the last sale (£608/sq ft) was about 78.9% above the typical sold price in the postcode. Most recent transfer: September 2019 at £974,500.
What this property has
Inside
- Bedrooms5
- Dining roomYes
- CloakroomYes
- EnsuiteYes
- ConservatoryYes
Outside
- GarageYes
Everything you need to know about 39 Cassiobury Drive
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
EPC Rating
Certificate validity
Valid until 6 June 2029
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Windows upgraded, improving insulation
Wall insulation improved
Roof insulation improved
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £1,645 · Includes VAT
Planning history
A a two-storey front extension application was refused at 39 Cassiobury Drive in 2025.
7 applications on record at 39 Cassiobury Drive, Watford, WD17 3AA
- Dec 2015Loft ConversionAmendmentOutcome in report
Lawful Development Certificate for hip to gable ends loft conversion with rear dormer.
- Documents
- 8 docs on file
- Reference
- 15/01485/LDC
- More recent applications — locked
- ExtensionApr 2026Decision
- ExtensionDec 2025Decision
+ 4 more applications in the report
Unlock 39 Cassiobury Drive, Watford, WD17 3AA's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (7 on record)
- All 7 applications on this property in full, plus 1 notable nearby
- The 46 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
39 Cassiobury Drive has more than quadrupled in price since its earliest registered sale in 1997.
£1,118,000
Modelled from EPC, postcode comparables and a sale-price growth of 18.8% per year over 22 years.
£974,500
Growth on file: 18.8% per year over 22 years.
Sales timeline
18 September 2019Most recent
£974,500
+116.6%over 10 years2 March 2009
£450,000
+1945.5%over 11 years27 August 1997
£22,000
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
£1,410,00015 Cassiobury Drive, Watford, WD17 3AA
Sold Sept 2019
£930,000
Versus other Cassiobury Drive homes
On co₂ emissions, 39 Cassiobury Drive stands well clear of the street.
Price per m²
£6,540
Street avg £5,238
Floor Area
149 m²
Street avg 171 m²
Habitable Rooms
7 rooms
Street avg 7 rooms
CO₂ Emissions
4.4 t/year
Street avg 7.7 t/year
Everything you need to know about 39 Cassiobury Drive
The true value, the hidden risks and the full sale history, in one report.
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
266/mo
Falling 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
A Local Area 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






