How much is 10 Downing Street worth?

• !12 flood-warning areas sit within about 2 km of this postcode: catchment context to check at the property, not a building-risk finding.
• !2 flood alerts are active within 10 km right now. These alerts have not been matched to this building.
• !This is a busier area for reported crime: about 5090 incidents a month within a mile. That's normal for towns and cities; the figure counts volume and isn't adjusted for how built-up the area is.
• !This home is inside the Whitehall Conservation Area, so changing windows, doors, walls or trees usually needs permission.
• !387 listed buildings are within 700 m (76 grade I, 82 grade II*, 229 grade II); the nearest is 10, Downing Street Sw1 at 19 m. Check whether this property itself is listed.
• !This home is inside an Article 4 Direction area (Article 4 Basement Development Permitted Rights Removed), so some normally-allowed alterations (often including converting to a small HMO) need planning permission.
• !95 brownfield (previously-developed) sites are currently on the local register within 1,500 m, plus 2 earlier entries since removed from it (97 register entries in all): possible future development nearby.

What this flood check covers. At the postcode location, the available source results cover flooding from rivers and the sea (the Environment Agency's statutory Flood Zone) and flooding from surface water (rainfall running off the ground), now and on the 2050s climate projection. We do not assess groundwater flooding (a rising water table), reservoir flooding or sewer flooding, because those come from datasets we do not hold. Groundwater is reported by a commercial flood search, the kind a conveyancer commissions from a commercial search provider; sewer flooding by your water company's drainage and water search (CON29DW); reservoir flooding free from the Environment Agency at check-long-term-flood-risk.service.gov.uk. Mapped levels above describe the postcode location for the mechanisms named; they do not establish this building's flood probability or history.

Ask the seller to confirm the property's flood history on the TA6 Property Information Form.

• Warning no longer in force: Tidal Thames riverside from Putney Bridge to Teddington Weir · raised 10 Oct 2026

  There is no longer a threat of flooding. Weather conditions are expected to improve and no further flooding is expected. We will continue to monitor the situation and will issue further alerts or warnings if necessary. Continue to take care on waterside roads and footpaths and don't put yourself in unnecessary danger.

• Warning no longer in force: Tidal Thames riverside from the Thames Barrier to Putney Bridge · raised 10 Oct 2026

  There is no longer a threat of flooding. Tidal conditions are expected to improve and no flooding is expected. We will continue to monitor the situation and will issue further alerts or warnings if necessary. Continue to take care on waterside roads and footpaths and don't put yourself in unnecessary danger.

What to do:Ask the seller (on the TA6 form) whether the property has ever flooded, and get a flood-specific insurance quote before you commit.

31 flood-management assets within about 1.5 km, from the Environment Agency's asset register: walls, embankments, culverts, outfalls and maintained channels. None of the graded assets is below the EA's target condition.

• Property Flood Resilience in Kensington and Chelsea · Surface Water Flooding · Greater London
• Thames Barrier Connectivity Works · Capital Maintenance · Sea Flooding · Greater London
• Dartford Creek Barrier · Capital Maintenance · River Flooding · Greater London
• Thames estuary asset maintenance-Swan Draw Dock · Capital Maintenance · Tidal Flooding · Greater London
• Thames Barrier Monel Bolt replacement · Capital Maintenance · Tidal Flooding · Greater London

EA capital flood and coastal risk-management programme: schemes funded or in progress, not a guarantee of protection at this address.

Contains Environment Agency information © Environment Agency and database right, licensed under the Open Government Licence v3.0 "Maintained by" is the register's responsible party; a riparian or private owner means the cost of upkeep falls on them, not the EA.

Both coal-area queries returned no match at the postcode point. This is outside the queried DHRA/DLRA coverage; it does not establish the absence of every mining hazard at the property.

What to do:Ask whether the home has ever had subsidence or underpinning, and check it's covered by buildings insurance.

• Collapsible deposits

  Collapsible deposits: Low across this 65 km² area (BGS GeoSure 5 km cell); the nearest Moderate-rated cell begins about 15.2 km W.

• Compressible ground

  Compressible ground: Low across this 65 km² area (BGS GeoSure 5 km cell); the nearest Significant-rated cell begins about 5.3 km E.

  BGS advisory: Areas of localised significant rating.

• Landslide (slope instability)

  Landslide (slope instability): Low across this 65 km² area (BGS GeoSure 5 km cell); the nearest Moderate-rated cell begins about 7.7 km SE.

  BGS advisory: Areas of localised significant rating.

• Running sand

  Running sand: Low across this 65 km² area (BGS GeoSure 5 km cell); the nearest Moderate-rated cell begins about 5.3 km E.

• Shrink–swell (clay subsidence)

  Shrink–swell (clay subsidence): Significant across this 65 km² area (BGS GeoSure 5 km cell); no cell in Great Britain is rated higher for this hazard.

  BGS advisory: Areas of localised significant rating.

• Soluble rocks (dissolution / sinkholes)

  Soluble rocks (dissolution / sinkholes): Low across this 65 km² area (BGS GeoSure 5 km cell); the nearest Significant-rated cell begins about 13.3 km SE.

Non-coal mining: no known record of mining activity in this 2.6 km² area (BGS 1 km cell); the nearest Moderate-rated cell begins about 2.5 km SE.

This is the BGS mining hazard dataset that EXCLUDES coal. A rating of NA means no record of NON-COAL mining (tin, lead, salt, limestone, chalk and similar); it says nothing about coal. Coal risk is screened separately against the Mining Remediation Authority development risk areas.

BGS attaches a standing advisory note to every cell in one or more of the layers above. Because it applies to the whole of Great Britain it says nothing about this location, so it is not shown here as a finding.

BGS notice: "Not suitable for local or site specific analysis, data is generalised for national overview uses only"

These ratings describe an area, not a building. The GeoSure cell above covers about 65 km², and the mining cell about 2.6 km². Which side of a cell edge a house falls on is arbitrary, so read the distances above as carefully as the ratings. Only a site investigation speaks to this plot.

Contains British Geological Survey materials © UKRI 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. Open Government Licence v3.0. BGS GeoSure 5 km hex grid + BGS Mining hazard (not including coal) 1 km hex grid, product version Version 8.

What to do:Treat this as a screening layer, not an answer about the plot. If any hazard here rates Moderate or Significant, or a higher-rated area starts close by, ask your surveyor to look for it specifically, and ask the seller whether the property has ever had movement, cracking or underpinning.

No former landfill site is recorded within 1 km of this address on the Environment Agency's historic landfill layer. The record is good but not perfect: it was compiled from council and Agency files in the 1990s and is still being added to, so an environmental search can occasionally name a tip the layer lacks.

Between 1 and 2 km (context, not a finding about this plot): 1 further former landfill site: Portugal Street (EAHLD12040, 1.46 km).

No currently or recently permitted landfill boundary is recorded within 2 km of this address.

The Environment Agency records every substantiated incident with a Category 1 (major) or Category 2 (significant) impact on water, land or air. 1 incident within 1 km in the last 10 years:

• 24 Sept 2019 · Category 2 (significant) to water and air479 m

  Sewage Materials: Storm Sewage · air 2 / land 4 / water 2 · EA ref 1740919

Older incidents within 1 km (2000 to 10 years ago)

• 9 Jul 2001 · Category 1 (major) to water795 m

  Sewage Materials: Storm Sewage · air 4 / land 4 / water 1 · EA ref 14969

Environment Agency information warning: Where these data indicate an incident occurred on a particular site or property no inference should be drawn that the site or property owner necessarily was responsible. Incidents are plotted at the location the Agency confirmed, which may be the watercourse or road affected rather than the source. Snapshot of the Agency's quarterly file taken 5 Oct 2026, covering 15 Feb 2000 to 22 Sept 2026; recent incidents can take months to appear.

Environmental permits and discharges within 1 km (Environment Agency public registers)

19 permitted sites within 1 km, holding 30 permits between them. The same site with several permits is shown once. Most are routine (a storm overflow, a hospital's radioactive-materials registration); a permit records permission, not behaviour. A further 16 low-grade waste exemptions are registered within 1 km and counted rather than listed.

• Discharge to water or groundwater, THE CABINET OFFICE, 70 WHITEHALL, LONDON, SW1A 2AS57 m

  Permit TH/EPRUP3620GY/001 · Trade - Abstracted Groundwater Used in Heat Exchanger · effective 1 Nov 2012

• Discharge to water or groundwater, VICTORIA COMBINED SEWER OVERFLOW, VICTORIA EMBANKMENT, WESTMINSTER, LONDON, SW1A 2HR372 m

  2 permits TH/EPRWB3295ES/001, TH/EPRWB3295ES/002 · Sewage - Storm Sewage · effective 31 Dec 2023 · revoked 14 Apr 2024 · Sewage - Storm Sewage · effective 15 Apr 2024

  Storm overflow Combined sewer overflow at Victoria → River Thames (Esturine) · 2025: 0 spills · 0 h · monitor 90.7 %

• Discharge to water or groundwater, VICTORIA EMBANKMENT FORESHORE, WHITEHALL GARDENS, CITY OF WESTMINSTER, LONDON, WC2N 5DJ391 m

  2 permits TH/EPRMB3592AC/001, TH/EPRNB3096AF/001 · Trade - Dewatering · effective 1 May 2019 · revoked 4 Oct 2023 · Trade - Process · effective 19 Sept 2019 · revoked 25 May 2023

• Discharge to water or groundwater, REGENT STREET CSO, VICTORIA EMBANKMENT, WESTMINSTER, LONDON, WC2N 5DJ432 m

  2 permits TH/CSAB.0570/001, TH/CSAB.0570/002 · Sewage - Storm Sewage · effective 5 Oct 1987 · revoked 11 Apr 2021 · Sewage - Storm Sewage · effective 12 Apr 2021 · revoked 23 Feb 2026

  Storm overflow REGENT STREET CSO → R.THAMES ( TIDAL ) · 2025: 0 spills · 0 h · monitor 97.3 % · 2024: 13 spills · 28 h · monitor 99.7 % · 2023: 13 spills · 28 h · monitor 99.1 %

• Discharge to water or groundwater, NORTHUMBERLAND STREET CSO, VICTORIA EMBANKMENT, WESTMINSTER, LONDON-, WC2N 5DJ444 m

  2 permits TH/CSAB.0531/001, TH/CSAB.0531/002 · Sewage - Storm Sewage · effective 5 Oct 1987 · revoked 11 Apr 2021 · Sewage - Storm Sewage · effective 12 Apr 2021

  Storm overflow NORTHUMBERLAND STREET CSO → R.THAMES ( TIDAL ) · 2025: 1 spill · 1.5 h · monitor 99.5 % · 2024: 16 spills · 38 h · monitor 98.8 % · 2023: 19 spills · 41 h · monitor 95.7 %

• Discharge to water or groundwater, PALACE OF WESTMINSTER, LONDON, PALACE OF WESTMINSTER, WESTMINSTER, LONDON, SW1A 0AA476 m

  Permit TH/CATM.2293/001 · Sewage - Sewage in an Emergency · effective 6 Jun 1996

• Permitted industrial installation, PricewaterhouseCoopers Llp, PwC, 1 Embankment Place, LONDON, WC2N 6RH501 m

  Permit EPR/HB3395YT · Medium Combustion Plant and Specified Generator · http://environment.data.gov.uk/public-register/def/regime/industrial-installation

• Discharge to water or groundwater, 36-38 QUEEN ANNE'S GATE, 36-38 QUEEN ANNE'S GATE, LONDON, SW1H 9AP552 m

  Permit TH/NPSWQD008790/001 · Trade - Abstracted Groundwater Used in Heat Exchanger · effective 8 Mar 2010

• Discharge to water or groundwater, THE LONDON EYE, THE RIVERSIDE BUILDING, COUNTY HALL, WESTMINSTER BRIDGE ROAD, LONDON, SE1 7PB564 m

  Permit TH/CASM.0261/001 · Trade - Process · effective 31 Aug 2000

• Discharge to water or groundwater, ST MARTIN IN THE FIELDS CHURCH, 5-6 ST MARTIN'S PLACE, 12 ADERLAIDE STREET, LONDON, LONDON, WC2N 4JJ588 m

  2 permits TH/NPSWQD000369/001, TH/NPSWQD000369/002 · Trade - Abstracted Groundwater Used in Heat Exchanger · effective 7 Apr 2008 · revoked 17 Feb 2013 · Trade - Abstracted Groundwater Used in Heat Exchanger · effective 18 Feb 2013

• Discharge to water or groundwater, SHELL CENTRE, LONDON, SHELL CENTRE, LONDON697 m

  Permit TH/CTMR.0127/001 · Trade - Cooling Waters · effective 1 Nov 1976

• Discharge to water or groundwater, SAVOY STREET CSO, WATERLOO BRIDGE, WESTMINSTER, LONDON, SE1 8TL710 m

  2 permits TH/CSAB.0532/001, TH/CSAB.0532/002 · Sewage - Storm Sewage · effective 5 Oct 1987 · revoked 11 Apr 2021 · Sewage - Storm Sewage · effective 12 Apr 2021

  Storm overflow SAVOY STREET CSO → R.THAMES ( TIDAL ) · 2025: 6 spills · 13 h · monitor 92.7 % · 2024: 5 spills · 1.9 h · monitor 97.3 %

• Discharge to water or groundwater, WOOD STREET CSO, MILLBANK, WESTMINSTER, LONDON, SW1P 3SF717 m

  2 permits TH/CSAB.0564/001, TH/CSAB.0564/002 · Sewage - Storm Sewage · effective 5 Oct 1987 · revoked 8 Feb 2021 · Sewage - Storm Sewage · effective 9 Feb 2021

  Storm overflow WOOD STREET CSO → R.THAMES ( TIDAL ) · 2025: 4 spills · 4.6 h · monitor 79.5 % · 2024: 9 spills · 23 h · monitor 85.7 % · 2023: 13 spills · 19 h · monitor 99.8 %

• Discharge to water or groundwater, ROYAL FESTIVAL HALL, THE SOUTH BANK CENTRE, BELVEDERE ROAD, LONDON, SE1 8XX794 m

  4 permits TH/CASM.1004/001, TH/CASM.1004/002, TH/CASM.1004/003, TH/CASM.2630/001 · Trade - Cooling Waters · effective 17 May 2004 · revoked 31 Oct 2005 · Trade - Cooling Waters · effective 1 Nov 2005 · revoked 31 Oct 2006 · Trade - Cooling Waters · effective 1 Nov 2006 · Trade - Abstracted Groundwater Used in Heat Exchanger · effective 25 May 2007 · revoked 25 May 2019

• Permitted industrial installation, 8, Southbank Place Development Energy Centre CHP Plant, Casson Square, Lambeth, London, SE1 7GU831 m

  Permit EPR/UP3700BV · New Medium Combustion Plant before 20th December 2018 - 25A(a) & 12(1A)(a) · http://environment.data.gov.uk/public-register/def/regime/industrial-installation

4 further permitted sites within 1 km not listed individually: 2 permitted radioactive-substance use (e.g. medical/industrial); 1 permitted industrial installation; 1 discharge to water or groundwater.

6 monitored storm overflows within 1 km and 10 more between 1 and 2 km, with what the water company reported to the Environment Agency for each year of the return: 15 counted spills over 23 hours between them in 2025. A storm overflow is permitted sewer infrastructure that releases diluted sewage to a watercourse when the network is overwhelmed by rain; it is not a record of contamination on the plot.

Reading the table. “sp” is counted spills under the Environment Agency's 12–24 hour method; hours are the total time discharging. A monitor-uptime note under a year means the event duration monitor ran for less than 90 % of that year, so the figures understate it. These are the water companies' regulatory annual returns, not live status, and the return lists only overflows that were monitored in the year. Snapshot of the returns taken 9 Oct 2026.

What we could not check

What to do:Ask your conveyancer to raise the CON29 3.13 contaminated-land enquiry with the council: the statutory register is the one record this section cannot read.

Each figure is a modelled annual mean for 2024, shown against the annual-mean objective that applies in the UK (excluding Scotland-specific objectives). Comparing a modelled background cell against those objectives is a benchmark, not a compliance determination. The objectives themselves apply at specific relevant locations, which a council assesses.

The nearest modelled major road is A3212, about 100 m away. Defra models its kerbside nitrogen dioxide (1–5 m from the kerb) at 30.3 µg/m³ as an annual mean, 0.4 µg/m³ HIGHER than the 1 km background above.

That gap is the number that matters if the property fronts this road. The background figure is deliberately modelled away from traffic, so a home on the kerb of a busy road can sit well above its own 1 km square. Rooms facing A3212 will be closer to the kerbside figure than to the background one.

• A3212100 m · NO₂ 30.3 µg/m³
• A3214270 m · NO₂ 30.0 µg/m³
• A302270 m · NO₂ 30.0 µg/m³
• A3211290 m · NO₂ 30.0 µg/m³
• A302300 m · NO₂ 30.0 µg/m³

Defra models roadside concentrations only for its major-road link network, not for every street. A link nearby is meaningful; the absence of one means no MODELLED major-road link was found within the search radius, which is not the same as the property not being on a busy road.

Modelled annual-mean background concentration for the 1 km grid square containing this address (Defra Pollution Climate Mapping). It is a model output for the square kilometre, not a measurement taken at the property.

© Crown copyright 2021 Defra via uk-air.defra.gov.uk, licensed under the Open Government Licence. Modelled year 2024; objectives applied for the UK (excluding Scotland-specific objectives).

• Thames Tideway Tunnel · Waste waterPost-decision · 1.25 km

Planning Inspectorate national infrastructure register.

What to do:If any are close or still in planning, check the project page for how it could affect the area before you offer.

This is the total charge for the billing-authority area: the county or unitary element plus adult social care, police, fire and an AVERAGE parish precept. Parish precepts vary within an authority, so an individual bill can sit slightly either side of this figure. Northern Ireland is not in this table at all: it charges domestic rates based on capital value rather than council-tax bands.

Band D charges 2026/27, MHCLG, https://www.gov.uk/government/statistics/council-tax-levels-set-by-local-authorities-in-england-2026-to-2027. Open Government Licence v3.0. Band proportions are the statutory ones. Discounts (single occupancy, students, disability banding) are not applied.

What to do:Check this property's actual band on the Valuation Office Agency's free band search before you budget: the band mix in this section describes the surrounding area, not this address.

What to do:Look the address up at gov.uk/find-energy-certificate (free, instant) and ask the agent for the certificate; it is legally required before a home is marketed.

Modelled solar yield via PVGIS (EU Joint Research Centre). Actual output depends on roof shading, orientation and panel quality.

What to do:Enter the postcode at checker.ofcom.org.uk for predicted broadband speeds by provider and indoor/outdoor mobile signal on all four networks, then ask the seller which provider they use and what speed they actually get.

387 in total within about 700 m, nearest first. "Listed since" is the register's entry date, which for older listings is the date the record was digitised rather than the original designation. Grade I is of exceptional interest, II* particularly important, II of special interest. All three carry the same legal consent requirement. National Heritage List for England via planning.data.gov.uk.

What to do:Before budgeting for renovations, confirm with the local planning authority exactly what needs permission.

Source: the local planning authority's brownfield land register via planning.data.gov.uk. Register entries are candidate sites for housing, not planning permissions; a site "since removed" has usually been built out or withdrawn.

11 Downing Street in London, also known colloquially in the United Kingdom as Number 11, is the official residence of the chancellor of the exchequer. The residence, in Downing Street in London, was built alongside the official residence of the Prime Minister at Number 10 in 1682.

Area summary via Wikipedia (CC BY-SA).

• Supermarkets & shops285 nearby · closest 314 m
• Schools & nurseries146 nearby · closest 495 m
• GP, pharmacy & health350 nearby · closest 550 m
• Parks & recreation668 nearby · closest 19 m
• Cafés, pubs & restaurants4054 nearby · closest 210 m
• Post office, bank & library158 nearby · closest 470 m

• Harris Westminster Sixth Form495 m
• Westminster Abbey Choir School570 m
• Milne’s House589 m
• Westminster School593 m
• Ashburnham House595 m
• St. Matthew's Primary School and Nursery721 m

• Embankment Place Primary Healthcare550 m
• Pall Mall Dental Clinic552 m
• Boots572 m
• Dolphins Pharmacy667 m
• Superdrug679 m
• Covent Garden Dental Clinic699 m

Amenity locations via OpenStreetMap (ODbL).

These are raw counts of incidents reported to police within about a mile. A busy high street naturally shows more than a quiet lane, so read it alongside the area type rather than as a danger score.

• Harris Westminster Sixth Form · 16 plusNot currently graded · 506 m
• St Matthew's School, Westminster · PrimaryGood · 724 m
• The Grey Coat Hospital · SecondaryOutstanding · 961 m
• Westminster City School · SecondaryNot currently graded · 1.00 km
• Soho Parish CofE Primary School · PrimaryNot currently graded · 1.02 km
• Burdett-Coutts and Townshend Foundation CofE Primary School · PrimaryNot currently graded · 1.07 km
• Oasis Academy South Bank Primary · PrimaryNot currently graded · 1.17 km
• The Marine Society College of the Sea · 16 plusNot currently graded · 1.19 km

Schools: DfE Get Information About Schools. Ratings: Ofsted (single overall grades were phased out for routine inspections in 2024, so newer inspections may show no grade).

Nearby stops

The 30 nearest of 16767 rated premises within about 0.5 miles. None of those listed is rated below 3.

16737 more rated premises within the radius are not listed.

By type: Restaurant/Cafe/Canteen 17 · Retailers - other 4 · Hotel/bed & breakfast/guest house 3 · Other catering premises 2 · Takeaway/sandwich shop 2 · School/college/university 1 · Retailers - supermarkets/hypermarkets 1.

Food hygiene ratings: Food Standards Agency, ratings.food.gov.uk. © Crown copyright, Open Government Licence v3.0. Ratings shown as at their inspection date and may have changed.

These records use exact address, company-number or reviewed building-ID links. A shared postcode is not a match. Other spatial checks in this report are centred on the postcode location unless their source states otherwise.

161 requests to 104 public sources were made for this report: 154 answered and 7 did not. 6 sources did not answer at all. Wherever that is the case the section above says "could not check" rather than showing a clean result.

A source that did not answer is missing information, never evidence of a clean result. Requests are to the public registers named in each section; no commercial search provider is used.