21 Alva Way, Watford, WD19 5EE
About 21 Alva Way
21 Alva Way is a two-bedroom detached house in Watford (WD19 5EE). It has a recorded floor area of 217 m² (around 2336 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (August 2025) shows a C (score 76), near the top of the C band. When first surveyed in May 2017 the rating was G, the property has climbed 4 bands since. Between certificates, window efficiency went from Very Poor to Average, hot-water efficiency went from Very Poor to Good and lighting went from Average to Very Good; while roof efficiency dropped from Good to Average. The recommended improvements would push it to B (score 83).
At 217 m² the property is well over the postcode median (102 m² across 10 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £927,000 sits 99.4% above the 2017 sale of £465,000. On a £-per-square-foot basis, the last sale (£199/sq ft) was about 29.5% below the postcode norm. 9 planning records sit against the property, 4 approved, 4 refused. Past consents include an extension, an annexe and a loft conversion, meaningful when judging how the property has evolved. On the market in August 2017 and unlisted since — roughly 9 years.
What this property has
Inside
- Bedrooms2
- Bathrooms1
- Dining roomYes
- EnsuiteYes
Outside
- GarageYes
Building
- RefurbishedYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Upgraded to gas central heating
Connected to mains gas supply
Heating controls upgraded for better temperature management
Hot water system upgraded
Single glazing replaced with double or better glazing
Floor insulation added or improved
More low energy lighting installed
Planning history
21 Alva Way has 4 separate extension applications on the council record.
- Nov 2019AnnexAmendmentIn report
Retrospective: Demolition of existing dwelling and construction of replacement bungalow with accomodation within the roofspace served by front and rear dormer; construction of outbuilding for use as a residential annexe and alterations to driveway.
RetrospectiveExtension- Documents
- 13 docs on file
- Reference
- 19/1710/RSP
- Jun 2019AmendmentIn report
Non-Material Amendment to planning permission 18/0589/FUL: Increase in height of eaves on single storey rear extension
- Documents
- 6 docs on file
- Reference
- 19/0843/NMA
What's in 21 Alva Way, Watford, WD19 5EE's planning history?
7 more on this property, plus refusals, disputes and full decisions nearby, in the report.
Sales history & valuation
21 Alva Way valuation sits well clear of the typical sold price in this postcode.
£927,000
Modelled from EPC, postcode comparables.
£465,000
Recorded with HM Land Registry.
Sales timeline
24 August 2017Most recent
£465,000
Median price across the last 5 sales in WD19 5EE: £510,000 (2025–2020).
Versus other Alva Way homes
21 Alva Way is notably below the street on price per m².
Price per m²
£2,143
Street avg £4,297
Floor Area
217 m²
Street avg 98 m²
Habitable Rooms
7 rooms
Street avg 4 rooms
CO₂ Emissions
5.0 t/year
Street avg 4.1 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Alva Way — bus stop.
Closest school
0.5 km
Warren Dell Primary School. 27 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
49.0dB

Night-time· 23:00 – 07:00
39.1dB








