10 Downing Street
London SW1A 2AA
Detached · Freehold · Grade I Listed · Built c. 1684
Report HC-100319 · updated 27 Jul 2026
HouseCheckup Score
Valuation
£4.25M
Flood Zone
1
EPC Rating
D
IQ Score
76 / 100
Council Tax
Band H
Heritage
Grade I
Yield (est.)
4.8%
Executive Summary & Red Flags
Page 1
Strengths
Concerns
Property Profile & Building History
Page 2
Property Details
Property Type
Detached
Tenure
Freehold (Crown Estate)
Built
c. 1684 (342 years old)
Floor Area
~350 sqm (estimated)
Bedrooms
4+ (official residence)
Council Tax Band
H (\u00a34,120/yr)
Listed
Grade I
Conservation Area
Yes
EPC History
| Date | Rating | Score | Assessor |
|---|---|---|---|
| 14 Mar 2022 | D | 55 | Certified Energy |
| 08 Nov 2018 | D | 52 | Green Deal Assessors |
| 22 Jan 2015 | E | 42 | EPC London |
EPC Score Trend
42 → 52 → 55
Sales History
| Date | Price | Type |
|---|---|---|
| Crown property | — | No recorded sales |
This is a Crown property and has not been sold on the open market. For most properties, HouseCheckup shows the full Land Registry price-paid history back to 1995.
Planning History
Internal refurbishment of ground floor
Installation of security bollards
Replacement of windows to rear
Extension to press briefing room
Restoration of original cornicing
Upgrade to CCTV and access control
This property has an active planning history with 6 applications in the last 4 years. The mix of Listed Building Consent (LBC) and Full Planning applications reflects the Grade I listed status — even internal changes require LBC approval. The refused application for the press briefing room extension indicates the strict approach Westminster takes to development in this area.
Built c.1684 as three townhouses, later combined and substantially modified by William Kent in the 1730s. The property has been the official residence of the Prime Minister since 1735. As a Grade I listed building, it is of exceptional interest — only 2.5% of all listed buildings in England achieve this classification.
Sold-Price History & Market Trend
Pages 6-8
Illustrative Estimate
£4,250,000
Confidence range: £3,800,000 – £4,700,000
Last Sold
Crown property
Price / sqm
£12,150
Area Avg / sqm
£15,200
Price / Room
£1,062,500
Comparables
8 within 0.5mi
Estimated Price History (1995–2025)
Price per sqm Comparison
The live report builds this section from HM Land Registry Price Paid history (street and wider postcode) and the HMLR UKHPI area-wide trend — every figure traceable to a named source. The illustrative £4,250,000 estimate and price-per-sqm comparison shown here would, for a normal address, sit alongside that real sold-price history; an indicative value range built from sold-price comparables is a paid Complete-tier feature. (10 Downing Street is a Crown property with no open-market sales, so its numbers are necessarily indicative.)
Energy & Carbon (EPC)
Page 13
Energy Performance Certificate
Annual Energy Costs
Carbon Footprint
An EPC Band D rating of 55 is below the England average of 66 (Band D). Annual energy costs of £3,940 are approximately 60% higher than a typical 4-bedroom property, driven primarily by the building's age (c.1684) and heritage constraints that limit insulation improvements. The potential Band B (81) rating would reduce annual costs by approximately £1,800 — but achieving this would require Listed Building Consent for most energy improvements.
Flood & Climate Risk
Page 6-7
EA areas ≤2km
Low
0 designated nearby
EA areas ≤5km
Low
Within wider radius
Live EA alerts ≤10km
Negligible
None right now
Surface water — now
Negligible
Very low (NAFRA2)
Surface water — 2050s
Low
Climate epoch
Coastal Erosion
Negligible
Inland — omitted
The live report screens Environment Agency designated flood-warning areas at 2km and 5km, checks for live EA alerts within 10km, and reads the EA/DEFRA NAFRA2 surface-water risk band for the present day against the projected 2050s climate epoch — flagging when modelled risk rises. Where an address sits on a mapped coastal frontage it adds the Shoreline Management Plan policy; inland addresses (like this one) omit coastal erosion entirely rather than claiming “no risk”. The address-level Flood Zone (1/2/3a/3b) is available free on the EA Flood Map for Planning and integrated in the paid Complete tier.
Ground & Environmental Risk
Pages 10 & 18
Shrink-swell Clay
Low
London clay — low susceptibility
Landslides
Negligible
Flat terrain
Compressible Ground
Low
Some alluvium present
Radon
Negligible
<1% of homes above action level
Contaminated Land
Low
None within 500m
Coal Mining
Negligible
Not in affected area
Noise Levels
Moderate
Moderate
Air Quality
The live report screens ground stability at area level from the Mining Remediation Authority (coal), BGS (clay shrink-swell trajectory and the National Landslide Database) and UKHSA (radon potential). Here the London Clay geology has low shrink-swell risk and negligible landslide susceptibility, and radon is not a concern in central London. Per-address BGS GeoSure banding, contaminated-land intersects and DEFRA modelled air quality (PM2.5/NO₂) are paid Complete-tier integrations rather than free per-address feeds. Noise comes from DfT road-traffic and DEFRA Noise Important Areas — 54 dB daytime is just below the WHO 55 dB guideline.
Crime — 24-Month Trend
Page 11
12-Month Crime Trend
-35%
year on year
The live report pulls reported crimes within 1 mile of the postcode centroid from data.police.uk across a 24-month window: the full category mix, a recent 6-month headline and a simple seasonality read of which calendar quarter runs hottest. Westminster shows higher-than-average volumes, typical for central London boroughs with high footfall and tourism, but the trend is declining. The most common categories — theft and anti-social behaviour — reflect the area's commercial and tourist character rather than residential safety concerns.
Schools & Healthcare
Page 12
| Name | Phase | Ofsted | Distance |
|---|---|---|---|
| Westminster Abbey Choir School(180 pupils) | Primary | Outstanding | 0.2mi |
| St Matthew’s CofE Primary(210 pupils) | Primary | Good | 0.3mi |
| Burdett-Coutts CofE Primary(245 pupils) | Primary | Good | 0.4mi |
| Westminster City School(780 pupils) | Secondary | Good | 0.5mi |
| Harris Westminster Sixth Form(540 pupils) | Secondary | Outstanding | 0.6mi |
| Grey Coat Hospital(1,050 pupils) | Secondary | Outstanding | 0.7mi |
The school provision shown here is illustrative. In the live report the schools & Ofsted section is built from DfE GIAS plus Ofsted ratings — an authenticated source we surface in the paid Complete tier; the preview shows the section structure and points to the official register rather than inventing ratings. School quality is one of the strongest price drivers in SW1A, with properties near Outstanding schools commanding a notable premium.
Transport, Energy & Broadband
Page 13
Nearest Stations
Westminster
Tube · 0.2mi · 3 min walk
Jubilee, District, Circle
St James’s Park
Tube · 0.3mi · 4 min walk
District, Circle
Pimlico
Tube · 0.6mi · 8 min walk
Victoria
Victoria
Rail / Tube · 0.7mi · 9 min walk
National Rail, Victoria
Broadband Speed
Mobile Coverage
The live report lists the nearest rail stations and NaPTAN stops within walking distance, and surfaces the MHCLG Energy Performance Certificate when one is on file for the postcode (current and potential band, running costs and recommended improvements) — never a fabricated band. Transport connectivity here is exceptional, with 3 tube stations within 0.7 miles and Victoria mainline under 10 minutes' walk. Broadband (the illustrative 920 Mbps full-fibre figure) comes from Ofcom Connected Nations, a paid Complete-tier integration.
Planning & Heritage
Pages 14-15
Heritage Constraints
Heritage constraints apply — planning restrictions may affect modifications
Entire building is listed
Whitehall Conservation Area
Permitted development removed
Recent Planning Applications
Internal refurbishment of ground floor offices
Ref: 24/00142/FULL
Installation of security bollards to Downing Street entrance
Ref: 23/08901/FULL
Replacement of windows to rear elevation with heritage glazing
Ref: 23/02817/LBC
Extension to press briefing room at rear ground floor
Ref: 22/09456/FULL
Three active heritage constraints significantly limit development potential: Grade I listing (the highest level of protection — only 2.5% of listed buildings), Conservation Area status, and an Article 4 Direction removing permitted development rights. Any external or material internal alterations require Listed Building Consent. This is a key factor in the lower-than-average price-per-sqm and affects all investment strategy scores.
Investor Analysis
Page 17
Rental Yield
Strategy Scores
Buy-to-Let
Flip / Refurb
HMO
Development
Long-term Hold
The investor analysis shown here is illustrative. In the live report this section explains the methodology and reserves the rental-yield model and the five investment-strategy scores (BTL, Flip, HMO, Development, Long-term Hold) for the paid Complete and Investor Pro tiers — the preview does not output them. For this property the thesis is dominated by long-term capital preservation: prime, supply-constrained SW1A location offset by heritage constraints, low yield and regulatory complexity.
Key Insight
This property is best understood as a capital preservation asset, not an income generator. With a net yield of just 0.9% and severe development restrictions, the investment thesis rests entirely on long-term price appreciation in one of the world's most supply-constrained property markets.
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