Osbourne House, Flat 10, 10 St Martins Lane, Beckenham, BR3 3XS
About Osbourne House
Osbourne House is a four-bedroom semi-detached house in Beckenham (BR3 3XS). It has a recorded floor area of 180 m² (around 1938 sq ft), construction records dating it to 1996-2002 and council tax band G. At 180 m² this is the largest unit on EPC record across Osbourne House (86–180 m²). The building's EPC ratings span C to B, with this unit at the bottom. On EPC score it ranks last in the building (77 versus a best of 82). The latest certificate (June 2023) shows a C (score 77), near the top of the C band. The rating has held steady at C across 2 certificates since December 2008. Between certificates, lighting went from Very Poor to Very Good; while roof efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good.
At 180 m² it's 21.6% larger than the typical home in the postcode (148 m² median across 22 EPCs). On the market in March 2012 and unlisted since — roughly 14 years. Today's modelled estimate of £1,002,000 is 39.2% above the 2012 sale price.
Know exactly what you're buying at Osbourne House
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms4
- Bathrooms3
- EnsuiteYes
Outside
- Private gardenYes
- ParkingYes
Building
- LiftYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
More low energy lighting installed
Planning history
Osbourne House has no planning applications on record.
Notable planning nearby
8applications of note in the surrounding area
We flagged 3 things worth checking at Osbourne House
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.
- Signs of HMO activity in the area
- Larger development activity nearby
- Environmental risk flagged
30-day money-back guarantee
Sales history & valuation
Osbourne House valuation sits well clear of the typical sold price in this postcode.
£1,002,000
Modelled from EPC, postcode comparables.
£720,000
Recorded with HM Land Registry.
Sales timeline
2 March 2012Most recent
£720,000
Median price across the last 5 sales in BR3 3XS: £818,000 (2024–2020).
Nearby sales in BR3 3XS
Anderson House, Flat 1, 12 St Martins Lane, Beckenham, BR3 3XS
Sold May 2024
£950,000Anderson House, Flat 9, 12 St Martins Lane, Beckenham, BR3 3XS
Sold Feb 2023
£725,000Anderson House, Flat 3, 12 St Martins Lane, Beckenham, BR3 3XS
Sold Mar 2022
£590,000Osbourne House, Flat 2, 10 St Martins Lane, Beckenham, BR3 3XS
Sold Nov 2021
£900,00016 St Martins Lane, Beckenham, BR3 3XS
Sold Apr 2019
£727,500
Everything we know about Osbourne House, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Signs of HMO activity in the area
- Larger development activity nearby
- Environmental risk flagged

Versus other St Martins Lane homes
On floor area, Osbourne House stands well clear of the street.
Price per m²
£4,000
Street avg £4,432
Floor Area
180 m²
Street avg 140 m²
Habitable Rooms
6 rooms
Street avg 4 rooms
CO₂ Emissions
3.9 t/year
Street avg 2.8 t/year
Similar properties nearby
Anderson House, Flat 10, 12 St Martins Lane
BR3 3XS
Anderson House, Flat 11, 12 St Martins Lane
BR3 3XS
Anderson House, Flat 1, 12 St Martins Lane
BR3 3XS
Anderson House, Flat 7, 12 St Martins Lane
BR3 3XS
Anderson House, Flat 5, 12 St Martins Lane
BR3 3XS
Anderson House, Flat 2, 12 St Martins Lane
BR3 3XS
Anderson House, Flat 8, 12 St Martins Lane
BR3 3XS
Anderson House, Flat 9, 12 St Martins Lane
BR3 3XS
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
9/mo
Rising year-on-year across the wider district.
Nearest stop
0.3 km
Langley Court / West Gate — bus stop.
Closest school
0.2 km
Unicorn Primary School. 31 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
50.5dB

Night-time· 23:00 – 07:00
41.7dB