Updated 21 September 2026 · 329 new leads in the last 30 days
Construction Leads in Barnet
Browse construction leads in Barnet from recently published planning applications across the borough. See which homeowners are preparing building work and make contact while the project is still being planned.
- Built from Barnet Council planning submissions
- Find projects while homeowners are still shaping the brief
- No bidding platforms or shared enquiry lists
Data sourced from Barnet Council planning records and refreshed regularly.
329
New Leads (30 Days)
£137,309
Average Project Value
108
High Value Projects
Over £100k
Extensions
Most Common Project
Construction Trends in Barnet
Barnet has one of north London’s strongest suburban housing markets, with a broad mix of 1930s semis, Edwardian terraces, detached family homes, and larger properties on generous plots. New Barnet, Friern Barnet, and East Barnet often produce rear extensions, loft conversions, and side additions, while Mill Hill, Totteridge, and Hadley Wood bring through more substantial refurbishments and structural schemes. Around Finchley, Golders Green, and Hampstead Garden Suburb, older homes and conservation constraints can create more detailed planning applications for alterations, roof work, and carefully designed extensions.
Project Type Breakdown
The chart below shows recent planning applications in Barnet by project type, giving builders a clearer view of the domestic work currently moving through the borough.
In Barnet, Extensions account for the majority of planning applications (275 of 447 in the last 30 days), with Loft Conversions also showing consistent demand alongside Garden Rooms.
Most Active Architects and Planning Consultants in Barnet
The architects and planning consultants submitting the most construction-related applications in Barnet, based on recent planning records.
- 1UPP Architects + Town Planners
- 2Dimensions- Planning&Architecture
- 3Adara
- 4W Planning
- 5The Market Design and Build
- 6Domus Architects and Project Managers Ltd
- 7Great Plans
- 8Homecraft Global
- 9Manu Design Limited
- 10HK Architects
Project Value Insights
Project budgets in Barnet cover a wide range. These value bands help you focus on opportunities that fit your team, workload, and margins.
- £25k – £50kGarage conversions, garden studios, smaller rear additions, and internal upgrades
- £50k – £100kDormer loft conversions, side extensions, and larger single-storey works
- £100k – £250kTwo-storey extensions, wraparound additions, and substantial home refurbishments
- £250k+Major structural alterations, high-spec renovations, and large detached-home projects
Higher-value projects are more common around Totteridge, Hadley Wood, Mill Hill, and Hampstead Garden Suburb, where larger homes, premium finishes, and stronger renovation budgets can support more ambitious work.
Recent Planning Applications in Barnet
Extensions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Wrap-Around Extension | 30 Greenway Close London N20 8EN | £100k–£250k | Part single, part two storey side and rear extension with roof extension and dormers. | Refused |
| Single Storey Rear Extension | London Borough of Barnet | £50k–£100k | Single storey rear extension with rooflight and additional rooflights to existing roof. | Approved |
| Side Extension | Greater London | £250k–£1m | Refurbishment of existing outbuildings and dwellinghouse, including side extensions and basement extension with swimming pool. | Approved |
| Rear Extension | Greater London | £50k–£100k | Retention and alterations to first floor rear extension with pitched roof. | Withdrawn |
| Extension | Greater London | £100k–£250k | Conversion and extension of a detached garage to a self-contained dwelling with associated amenities. | Refused |
Wrap-Around Extension
30 Greenway Close London N20 8EN
Part single, part two storey side and rear extension with roof extension and dormers.
Single Storey Rear Extension
London Borough of Barnet
Single storey rear extension with rooflight and additional rooflights to existing roof.
Side Extension
Greater London
Refurbishment of existing outbuildings and dwellinghouse, including side extensions and basement extension with swimming pool.
Rear Extension
Greater London
Retention and alterations to first floor rear extension with pitched roof.
Extension
Greater London
Conversion and extension of a detached garage to a self-contained dwelling with associated amenities.
Loft Conversions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Loft Conversion | 1 Woodville Gardens London NW11 9ED | £50k–£100k | Roof extension involving hip to gable, rear dormer and front facing rooflights. | Approved |
| Loft Conversion | Heron Croft Cavendish Road Barnet EN5 4ED | £100k–£250k | Single-storey side and rear wraparound extension with rooflights, front extension and porch, plus roof alterations including hip-to-gable, rear dormer and additional rooflights. | Refused |
| Loft Conversion | 37 Wykeham Road London NW4 2SS | £50k–£100k | Proposed lawful development certificate for roof extension with box dormer infill and side-facing windows. | Approved |
| Loft Conversion | 74 Sunnyfield London NW7 4RG | £100k–£250k | Non-material amendment to approved householder scheme (extensions, dormers and garage conversion) to add four rooflights to the rear roof slope. | Withdrawn |
| Loft Conversion | 15 Church Crescent London N20 0JR | £100k–£250k | Two-storey front extensions, garage conversion to habitable room, infill rear extension with balcony and comprehensive roof extension including crown roof, dormers and skylights; alterations to façade and fenestration. | Approved |
Loft Conversion
1 Woodville Gardens London NW11 9ED
Roof extension involving hip to gable, rear dormer and front facing rooflights.
Loft Conversion
Heron Croft Cavendish Road Barnet EN5 4ED
Single-storey side and rear wraparound extension with rooflights, front extension and porch, plus roof alterations including hip-to-gable, rear dormer and additional rooflights.
Loft Conversion
37 Wykeham Road London NW4 2SS
Proposed lawful development certificate for roof extension with box dormer infill and side-facing windows.
Loft Conversion
74 Sunnyfield London NW7 4RG
Non-material amendment to approved householder scheme (extensions, dormers and garage conversion) to add four rooflights to the rear roof slope.
Loft Conversion
15 Church Crescent London N20 0JR
Two-storey front extensions, garage conversion to habitable room, infill rear extension with balcony and comprehensive roof extension including crown roof, dormers and skylights; alterations to façade and fenestration.
Other Projects
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Heritage | 8 North Square London NW11 7AA | £100k–£250k | Conversion of garage and utility room into habitable space with rooflight and door/window replacements. | Approved |
| New Build | Greater London | £250k–£1m | Demolition of existing dwelling and erection of 3 two-storey dwellings with roofspace. | Approved |
| New Build | Greater London | £100k–£250k | Construction of a two storey single family dwellinghouse following demolition of existing house. | Approved |
| Heritage | Greater London | £25k–£50k | Re-tiling of roof and replacement of cast iron gutters and down pipes. | Approved |
| Garden Room | London | £25k–£50k | Erection of a rear outbuilding including a raised platform. | Approved |
Heritage
8 North Square London NW11 7AA
Conversion of garage and utility room into habitable space with rooflight and door/window replacements.
New Build
Greater London
Demolition of existing dwelling and erection of 3 two-storey dwellings with roofspace.
New Build
Greater London
Construction of a two storey single family dwellinghouse following demolition of existing house.
Heritage
Greater London
Re-tiling of roof and replacement of cast iron gutters and down pipes.
Garden Room
London
Erection of a rear outbuilding including a raised platform.
Data sourced from Barnet Council planning records and refreshed regularly.
Featured Projects
A selection of recent planning applications from across Barnet that local builders can follow up on.
Part single, part two storey side and rear extension following demolition of the existing conservatory. Roof extension involving including removal of chimney stack and new roof with side and rear dormers and front, side and rear facing rooflights
£100k–£250k30 Greenway Close London N20 8EN
Part single, part two storey side and rear extension with roof extension and dormers.
Conversion of existing garage and utility room into habitable room, including raising height of roof and insertion of 1no. rooflight and replacement of existing windows on west (side) garage elevation with 1no. door and 1no. window. Insertion of 1no. rooflight to flat section of the main roof. Removal of modern external waste pipes. (Revised design) Internal works include changes to floor layouts, changes to bathrooms, removal of a stud wall in bedroom, reinstatement of period fireplaces, creation of a double doorway at ground floor level to replace existing, relocation of ground floor WC (Listed Building Consent)
£100k–£250k8 North Square London NW11 7AA
Conversion of garage and utility room into habitable space with rooflight and door/window replacements.
Single storey rear extension with 1no. rooflight. Addition of 1no. front and 1no. rear facing rooflights to existing roof
£50k–£100kLondon Borough of Barnet
Single storey rear extension with rooflight and additional rooflights to existing roof.
Retention and refurbishment of the existing dwellinghouse, including demolition and replacement of two storey side extensions, replacement of windows, extension of basement with new swimming pool, gym, lounge area and plantrooms, and associated landscaping and refuse/recycling store.
£250k–£1mGreater London
Refurbishment of existing outbuildings and dwellinghouse, including side extensions and basement extension with swimming pool.
Recent applications from across the borough that builders can follow up on.
See All 329 Construction Leads in Barnet
View full Barnet project details while homeowners are still shaping their plans.
Get Access NowPlanning Application Outcomes in Barnet
38%
Approved
53%
Pending
9%
Rejected
In Barnet, 38% of planning applications are approved, 53% are still pending, and 9% are rejected. Contacting homeowners early gives you the best chance of winning work.
Earlier contact usually means less competition.
Based on planning application outcomes over the last 3 months.
Planning Approval Times in Barnet
In Barnet, most planning applications are decided within 8 weeks. Smaller projects like extensions tend to be approved more quickly, while larger developments can take longer.
Domestic vs Commercial Projects in Barnet
In Barnet, the vast majority (89%) of planning applications are domestic projects such as extensions and loft conversions. Commercial developments make up a smaller portion but can offer higher-value opportunities for larger contractors.
Demand for Building Work in Barnet
High property values in Barnet mean many owners treat building work as a serious long-term investment. Moving within north London can be expensive, so families often look to unlock more space from the home they already own. Older properties also create demand for wider upgrade work, including roofing, insulation, electrics, damp treatment, layout changes, kitchens, bathrooms, and full refurbishments alongside the more visible extension projects.
How to Win Jobs in Barnet
Contact Homeowners Early
Planning applications show who is preparing building work. Getting in touch at that stage helps you start the conversation before the project is widely quoted.
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 finding building work in Barnet through planning application data.
Track Planning Applications
We monitor Barnet Council and surrounding authorities daily for new residential projects.
Filter by Location & Type
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Contact Homeowners
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Nearby Areas
Builders working in Barnet often cover neighbouring north London boroughs too. Enfield, Haringey, Camden, and Harrow all sit within reach and bring through a useful mix of residential building work.
Frequently Asked Questions
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Find construction work in Barnet using planning data — no bidding platforms or shared enquiry lists.