21 Allanson Road, Marlow, SL7 1LE
About 21 Allanson Road
21 Allanson Road is a three-bedroom semi-detached house in Marlow (SL7 1LE). It has a recorded floor area of 117 m² (around 1259 sq ft), construction records dating it to 1976-1982 and council tax band D. Other recorded features include a conservatory. The home occupies a cul-de-sac position. The latest certificate (April 2024) shows a C (score 74). The recommended improvements would push it to B (score 85).
At 117 m² the property is well over the postcode median (83 m² across 14 EPCs), placing it in the larger end of the local stock. A recent sale: £695,000 in December 2024. 2 planning records sit against the property, 1 approved, 1 refused. Past consents include an extension, meaningful when judging how the property has evolved. Across 2003–2024, sale prices on this property compounded at 5.5% per year. On a £-per-square-foot basis, the last sale (£552/sq ft) was about 36.6% above the typical sold price in the postcode.
Know exactly what you're buying at 21 Allanson Road
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms3
- Bathrooms2
- CloakroomYes
- EnsuiteYes
- StudyYes
- ConservatoryYes
- FireplaceYes
Outside
- Private gardenRear
- GarageYes
- Cul-de-sacYes
Building
- RefurbishedYes
Energy performance
EPC Rating
Planning history
- Nov 2015ExtensionFullIn report
Extension: Part single, part two storey
Householder application for construction of single storey front porch extension and part two storey, part single storey rear extension
- Documents
- 4 docs on file
- Reference
- 15/07949/FUL
- Sept 2015PorchFullIn report
Extension: Part single, part two storey · Rear of property
Householder application for construction of single storey front porch extension and part two storey, part single storey rear extension.
Extension- Documents
- 4 docs on file
- Reference
- 15/07128/FUL
What's in 21 Allanson Road, Marlow, SL7 1LE's planning history?
Refusals, disputes and full decisions on this property and nearby, in the report.
Sales history & valuation
21 Allanson Road has more than tripled in price since its earliest registered sale in 2003.
£724,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.5% per year over 21 years.
£695,000
Growth on file: 5.5% per year over 21 years.
Sales timeline
13 December 2024Most recent
£695,000
+206.2%over 21 years12 December 2003
£227,000
Median price across the last 5 sales in SL7 1LE: £605,000 (2025–2021).
Everything we know about 21 Allanson Road, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?

Versus other Allanson Road homes
Years Held for 21 Allanson Road lags the street by a wide margin.
Price per m²
£5,940
Street avg £5,515
Floor Area
117 m²
Street avg 97 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
3.2 t/year
Street avg 3.1 t/year
Similar properties nearby
1 Beaufort Close
SL7 1EN
1 Allanson Road
SL7 1LE
1 Dedmere Rise
SL7 1PQ
1 Claremont Gardens
SL7 1BP
1 Archers Court, Station Road
SL7 1PT
1 Bisham Court, Bisham
SL7 1SD
1 Churchill Drive
SL7 1TN
1 Carlton Place
SL7 1AL
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
Bobmore Lane — bus stop.
Closest school
0.4 km
Great Marlow School. 11 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
55.9dB

Night-time· 23:00 – 07:00
47.2dB