Updated 8 October 2026 · 552 new leads in the last 30 days
Construction Leads in Westminster
Find active construction leads in Westminster from planning applications submitted to Westminster City Council. Connect with homeowners planning high-value refurbishments, basement works, and listed building projects before they engage a builder.
- Drawn from Westminster City Council planning submissions, updated regularly
- Get in front of homeowners while they are still planning the work
- No shared lists, no bidding. Direct access to the data.
Data sourced from Westminster City Council planning records, updated regularly.
552
New Leads (30 Days)
£136,956
Average Project Value
130
High Value Projects
Over £100k
Heritages
Most Common Project
Construction Trends in Westminster
Residential work in Westminster tends to be complex and high-value. St John's Wood and Maida Vale have substantial Victorian villas and mansion blocks on tree-lined avenues where loft schemes and full refurbishments are common. Pimlico is almost entirely Regency stucco terraces, many needing serious structural attention and internal overhaul. Mayfair and Belgravia represent some of the most demanding domestic work in the country: basement excavations beneath Georgian townhouses, listed building alterations, and whole-house renovations managed across long timelines. Conservation area coverage is near-total, which means even modest alterations often require consent and a specialist approach.
Project Type Breakdown
The breakdown below shows the most common construction project types submitted to Westminster City Council planning in the past 30 days.
In Westminster, Heritages are the most common project type, appearing in 436 of the 552 leads tracked in the last 30 days, with Extensions also showing consistent demand alongside Garden Rooms. Projects can fall into more than one category, so these figures don't need to add up to the total.
Most Active Architects and Planning Consultants in Westminster
The architects and planning consultants submitting the most construction-related applications in Westminster, based on recent planning records.
- 1Montagu Evans LLP
- 2DP9
- 3Newmark
- 4Smith Jenkins Ltd
- 5Savills
- 6Rolfe Judd Planning
- 7Firstplan
- 8Turley
- 9The Planning Lab
- 10Howard De Walden Estates Limited
Project Value Insights
Westminster sits at the top end of London for domestic project values. These ranges give builders a frame of reference for the kinds of budgets typically in play.
- £25k – £50kInternal alterations, minor structural works, and heritage repairs
- £50k – £100kLoft conversions, rear extensions, and high-spec flat refurbishments
- £100k – £250kWhole-floor refurbishments, double-storey works, and significant listed building schemes
- £250k+Basement excavations, full townhouse renovations, and large structural projects
The highest-value work is concentrated in Mayfair, Belgravia, and St John's Wood, where budgets for single projects can run well above the top of this range.
Recent Planning Applications in Westminster
Extensions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Extension | City of Westminster | £50k–£100k | Detailed drawings for windows to mansard roofs as part of listed building consent. | Approved |
| Single Storey Rear Extension | City of Westminster | £50k–£100k | Erection of a single storey rear extension at lower ground floor level. | Approved |
| Single Storey Rear Extension | City of Westminster | £50k–£100k | Erection of a single storey rear extension at first floor level. | Refused |
| Single Storey Side Extension | London | £50k–£100k | Erection of a single-storey ground floor side/infill extension. | Approved |
| Rear Extension | City of Westminster | £50k–£100k | Garage conversion with rear extension and internal alterations. | Approved |
Extension
City of Westminster
Detailed drawings for windows to mansard roofs as part of listed building consent.
Single Storey Rear Extension
City of Westminster
Erection of a single storey rear extension at lower ground floor level.
Single Storey Rear Extension
City of Westminster
Erection of a single storey rear extension at first floor level.
Single Storey Side Extension
London
Erection of a single-storey ground floor side/infill extension.
Rear Extension
City of Westminster
Garage conversion with rear extension and internal alterations.
Loft Conversions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Loft Conversion | City of Westminster | £25k–£50k | New glazed roof to rear extension and loft conversion with conservation skylight. | Approved |
| Loft Conversion | City of Westminster | £100k–£250k | Full planning permission for a mansard roof over the main house and side wing, replacement lower-ground rear extension with roof terrace, lowering of lower-ground slab, installation of an air source heat pump, new front boundary treatment and a new second-floor window. | Approved |
| Loft Conversion | 106 Kilravock Street London W10 4HZ | £50k–£100k | Utilisation of existing loft space with internal layout updates, introduction of rooflights and replacement of ground-floor fenestration. | Approved |
| Loft Conversion | 4 Biddulph Road London W9 1JB | £250k–£1m | Variation of condition to allow alteration to the rear/side roof design for a scheme involving rear ground and first floor extensions, single-storey side extension, rear roof dormer, basement excavation, rooflights, window/door alterations, bin store and landscaping. | Approved |
| Loft Conversion | City of Westminster | £50k–£100k | Provision of a rear dormer and insertion of rooflights to the front roofslope. | Approved |
Loft Conversion
City of Westminster
New glazed roof to rear extension and loft conversion with conservation skylight.
Loft Conversion
City of Westminster
Full planning permission for a mansard roof over the main house and side wing, replacement lower-ground rear extension with roof terrace, lowering of lower-ground slab, installation of an air source heat pump, new front boundary treatment and a new second-floor window.
Loft Conversion
106 Kilravock Street London W10 4HZ
Utilisation of existing loft space with internal layout updates, introduction of rooflights and replacement of ground-floor fenestration.
Loft Conversion
4 Biddulph Road London W9 1JB
Variation of condition to allow alteration to the rear/side roof design for a scheme involving rear ground and first floor extensions, single-storey side extension, rear roof dormer, basement excavation, rooflights, window/door alterations, bin store and landscaping.
Loft Conversion
City of Westminster
Provision of a rear dormer and insertion of rooflights to the front roofslope.
Other Projects
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Heritage | City of Westminster | £50k–£100k | Detailed drawings of residential timber windows at seventh floor level as per condition 5 of listed building consent. | Approved |
| Heritage | City of Westminster | £25k–£50k | Details of new windows and doors pursuant to listed building consent. | Approved |
| Heritage | City of Westminster | £25k–£50k | Internal alterations including repainting window frames and replacing window hinges/handles. | Approved |
| Heritage | London | £50k–£100k | Internal layout alterations and refurbishment works at Manor House. | Approved |
| Heritage | City of Westminster | £25k–£50k | Details of new doors and architraves pursuant to listed building consent. | Approved |
Heritage
City of Westminster
Detailed drawings of residential timber windows at seventh floor level as per condition 5 of listed building consent.
Heritage
City of Westminster
Details of new windows and doors pursuant to listed building consent.
Heritage
City of Westminster
Internal alterations including repainting window frames and replacing window hinges/handles.
Heritage
London
Internal layout alterations and refurbishment works at Manor House.
Heritage
City of Westminster
Details of new doors and architraves pursuant to listed building consent.
Data sourced from Westminster City Council planning records, updated regularly.
Featured Projects
A selection of recent construction opportunities from across Westminster that builders can follow up on now.
New glazed roof to the existing rear extension, two new conservation skylights to rear roofslope, new window to rear ground floor level and replacement of windows from UPVC to timber slimline double glazed windows.
£25k–£50kCity of Westminster
New glazed roof to rear extension and loft conversion with conservation skylight.
Detailed drawings (scales 1:20, 1:5, 1:1) for the windows to the mansard roofs to Sackville Street pursuant to partial discharge of condition 5 of listed building consent dated 13th January 2023 (RN: 22/07005/LBC)
£50k–£100kCity of Westminster
Detailed drawings for windows to mansard roofs as part of listed building consent.
Erection of a single storey rear extension at lower ground floor level and associated works.
£50k–£100kCity of Westminster
Erection of a single storey rear extension at lower ground floor level.
Erection of a single storey rear extension at first floor level.
£50k–£100kCity of Westminster
Erection of a single storey rear extension at first floor level.
Recent Westminster applications at an early enough stage to act on.
See All 552 Construction Leads in Westminster
Access full project details and contact homeowners directly, before the work is widely quoted.
Get Access NowPlanning Application Status in Westminster
48%
Approved
49%
Pending
3%
Refused
In Westminster, 48% of planning applications are approved, 49% are still pending, and 3% are refused. Pending applications can give builders an opportunity to make contact while projects are still at an early stage.
Reaching out while applications are still active helps you get ahead of the pack.
Based on planning applications submitted over the last 30 days.
Planning Approval Times in Westminster
Among applications tracked by BuildAlert in Westminster, the median time from submission to decision is 6 weeks. Smaller projects like extensions tend to be approved more quickly, while larger developments can take longer.
Based on approved applications with recorded decision dates over the last 3 months.
Domestic vs Commercial Projects in Westminster
In Westminster, 37% of planning applications are domestic and 63% are commercial. Both segments offer opportunities depending on the scale of work you take on.
Demand for Building Work in Westminster
Owners in Westminster rarely move within the borough. The cost and scarcity of available stock makes that impractical for most. Stamp duty on a typical Westminster transaction can run to six figures on its own. That keeps investment focused on improving existing properties rather than trading up. Much of the work comes from long-term residents adding space or modernising, alongside international buyers undertaking full renovations before they occupy. Architects are almost always involved from the start, and projects frequently run to many months.
How to Win Jobs in Westminster
Contact Homeowners Early
Planning data identifies who is preparing to build. Getting in early gives you the best chance of starting a conversation before other builders are involved.
Focus on Approved Applications
Approved applications can be particularly valuable because the project has cleared a major planning hurdle and may be moving closer to construction.
Target Higher-Value Projects
Filter by estimated project value to focus your outreach on jobs that match the size and type of work your business takes on.
How BuildAlert Works
Three steps to start identifying and winning construction work in Westminster.
Track Planning Applications
We monitor Westminster City Council and surrounding authorities daily for new residential projects.
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Contact Homeowners
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Nearby Areas
Builders active in Westminster often work across neighbouring boroughs too. Kensington and Chelsea, Camden, and Hammersmith and Fulham all sit within easy reach and bring through a similar type of residential work.
Frequently Asked Questions
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Find residential construction work in Westminster through planning data. No intermediaries, no bidding.