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21 Blenheim House, Crown Square, Southwark, London, SE1 2SF

Estimated value

£3,249,000

  • Since the 2017 sale (£3,600,000)-10%
  • Against SE1 2SF's recent median (£3,470,000)-6%

Newest record on this page: August 2022. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Floor area
240 m²
2583 sq ft
Energy rating
C
Score 77
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Valuation

About this valuation

How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.

Our estimate

£3,249,000

  • Against its 2017 sale (£3,600,000)-10%
  • Against SE1 2SF's recent median (£3,470,000)-6%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 21 Blenheim House is modelled from its 240 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in SE1 2SF. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.

What it's based on

  • Floor area

    240 m² from the EPC lodged in August 2016

  • Sales of this home

    1 sale recorded, the latest in 2017

  • Recent sales in SE1 2SF

    5 sales, median £3,470,000 (2022–2018)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: August 2022Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
PlanningNone on this homeFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

Sales timeline

  1. 2 May 2017Most recent

    £3,600,000

Median price across the last 5 sales in SE1 2SF: £3,470,000 (2022–2018).

Risks

What this page doesn't show

1 potential issue has already been flagged for 21 Blenheim House, Crown Square, Southwark, London, SE1 2SF. The detail, evidence and what to ask about it are in the Risks Report.
  • Larger development activity nearbyIn report
  • Flood risk from rivers, sea and surface waterIn report
  • Subsidence and ground-stability signalsIn report
  • Refusals, enforcement and big schemes nearbyIn report

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Overview

About 21 Blenheim House

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

21 Blenheim House is a property in Southwark, London, London (SE1 2SF). It has a recorded floor area of 240 m² (around 2583 sq ft). At 240 m² this is the 29th smallest of 32 units on EPC record in the building, where floor areas span 40–416 m². The building's EPC ratings span C to B, with this unit at the bottom. The latest certificate (August 2016) shows a C (score 77), near the top of the C band. The latest certificate is from August 2016, so improvements made since then won't be reflected.

At 240 m² the property is well over the postcode median (121 m² across 31 EPCs), placing it in the larger end of the local stock. On a £-per-square-foot basis, the last sale (£1,394/sq ft) was about 48.4% below the postcode norm. 9 years since the last transfer (May 2017).

Before you decide

Everything you need to know about 21 Blenheim House

The true value, the hidden risks and the full sale history, in one report.

Larger development activity nearby

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Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

21 Blenheim House'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 16 Aug 2026

Current Certificate
Aug 2016

EPC Rating

A
B
C
C77
D
E
F
G
Main Heating
—
Main Fuel
—
Hot Water
Very Good
Windows
Good
CO2 Emissions
6.9 t/year
Occupancy
—

Certificate validity

Expired on 16 August 2026

New assessment needed to sell or let
Planning

Planning history

Applications and permits filed against 21 Blenheim House, Crown Square, Southwark, London, SE1 2SF, sourced from the PlanIt planning register.

21 Blenheim House has no planning applications on record.

1

But the area is active

1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.

On the street

Versus other Crown Square homes

Four headline reads against 31 similar flats on this street, drawn from the latest EPC and Land Registry data.

Price per m² for 21 Blenheim House lags the street by a wide margin.

Price per m²

£15,000

Street avg £27,556

Strongly below

Floor Area

240 m²

Street avg 134 m²

Strongly above

CO₂ Emissions

6.9 t/year

Street avg 3.0 t/year

Strongly below

Years Held

9 years

Street avg 9 years

On par
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the London district page.
Full London report

Rail-style transport is unusually close for this postcode.

Crime

1516/mo

Steady year-on-year across the wider district.

Nearest stop

0.1 km

Tower Bridge — bus stop.

Closest school

0.3 km

Tower Bridge Primary School. 104 schools nearby.

Nearest schools

  • Tower Bridge Primary SchoolPrimary252m
  • Snowsfields Primary SchoolPrimary508m
  • St Joseph's Catholic Primary SchoolPrimary728m
  • St Michael's Catholic CollegeSecondary834m

Nearest stops

  • Tower BridgeBus stop81m
  • Tower Bridge RoadBus stop127m
  • Unicorn TheatreBus stop169m
  • Boss StreetBus stop191m

Most reported crime locally

  • Theft from Person6,403 reports25%
  • Violence & Sexual Offences4,098 reports16%
  • Anti-social Behaviour4,047 reports16%
  • Other Theft4,028 reports16%

Go deeper on the local area

A Local Area report breaks down crime, transport links, schools and air quality in depth.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around SE1 2SF from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for SE1 2SF

Daytime· 07:00 – 23:00

57.8dB

Moderate
Night-time road noise heatmap for SE1 2SF

Night-time· 23:00 – 07:00

50.4dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

2nd Floor FlatEPC C

We've checked 10 risk factors against the available data for this property and believe a Level 2 HomeBuyer Report could be a suitable option for you.

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£2.1m

10 Blenheim House, Crown Square, Southwark

SE1 2SF

£1.5m

10 Hanover House, Crown Square, Southwark

SE1 2SE

1 bed
£1.3m

1 Butlers & Colonial Wharf, Southwark

SE1 2PX

£1.2m

1 Blenheim House, Crown Square, Southwark

SE1 2SF

2 bed
£1.2m

1 Windlesham House, Duchess Walk, Southwark

SE1 2RZ

1 bed1 bath
£1.1m

1 Chatsworth House, Duchess Walk, Southwark

SE1 2RY

1 bed1 bath
£981k

1 Koops Mill Mews, Southwark

SE1 2SH

£822k

1 Sandringham House, Earls Way, Southwark

SE1 2QX

1 bed1 bath

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.
Valuation method in detail
How the estimate is made
The estimate for 21 Blenheim House is modelled from its 240 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in SE1 2SF. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
Where sold prices come from
Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 1 sale is recorded for 21 Blenheim House. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
Reading the EPC
Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for 21 Blenheim House was lodged in August 2016 at band C and expired in August 2026, so a new one is needed to sell or let. Floor area, heating and insulation details on this page come from it.
Planning records
Planning applications are collected from local authority registers through PlanIt. None is matched to 21 Blenheim House. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
Area figures
Crime is police-recorded street-level data over the last 17 months, which places each incident at an approximate point. The 104 schools and 30 stops listed are measured in a straight line from SE1 2SF, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 21 Blenheim House, Crown Square, Southwark, London, SE1 2SF. Each answer is also embedded as structured data for search engines.

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