Updated 26 July 2026 · 392 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.
392
New Leads (30 Days)
£147,943
Average Project Value
98
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 account for the majority of planning applications (275 of 425 in the last 30 days), with Extensions also showing consistent demand alongside Garden Rooms.
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 | Second Floor Flat 82 Saltram Crescent London W9 3JX | Internal and external alterations including creation of loft conversion with rear dormer and installation of roof lights. | Refused |
Loft Conversion
City of Westminster
New glazed roof to rear extension and loft conversion with conservation skylight.
Loft Conversion
Second Floor Flat 82 Saltram Crescent London W9 3JX
Internal and external alterations including creation of loft conversion with rear dormer and installation of roof lights.
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 | City of Westminster | £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
City of Westminster
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 392 Construction Leads in Westminster
Access full project details and contact homeowners directly, before the work is widely quoted.
Get Access NowPlanning Application Outcomes in Westminster
42%
Approved
51%
Pending
7%
Rejected
In Westminster, 42% of planning applications are approved, 51% are still pending, and 7% are rejected. Contacting homeowners early gives you the best chance of winning work.
Reaching out while applications are still active helps you get ahead of the pack.
Based on planning application outcomes over the last 3 months.
Planning Approval Times in Westminster
In Westminster, most planning applications are decided within 7 weeks. Smaller projects like extensions tend to be approved more quickly, while larger developments can take longer.
Domestic vs Commercial Projects in Westminster
In Westminster, 58% of planning applications are domestic and 42% 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
Prioritise leads that have already received planning approval. These homeowners are ready to hire and start work.
Target Higher-Value Projects
Filter for projects over £50k. Fewer builders compete for larger jobs, giving you better margins and longer contracts.
How BuildAlert Works
Three steps to start identifying and winning construction work in Westminster.
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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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