Updated 8 October 2026 · 108 new leads in the last 30 days
Construction Leads in Hertsmere
Access construction leads in Hertsmere by tracking newly submitted planning applications. See which homeowners and developers across the borough are preparing extensions, loft conversions, and new builds, and get in touch before they begin shortlisting builders.
- New planning applications added frequently from Hertsmere Borough Council
- Connect with homeowners at the early planning stage
- No shared enquiries or competitive bidding
Data sourced from Hertsmere Borough Council planning records and refreshed regularly.
108
New Leads (30 Days)
£135,069
Average Project Value
30
High Value Projects
Over £100k
Extensions
Most Common Project
Construction Trends in Hertsmere
Hertsmere is best known for Borehamwood and Elstree's film and television studio heritage, home to Elstree Studios and the BBC's Elstree Centre, where productions from Star Wars to EastEnders have been made — a legacy that continues to draw commercial investment into the borough alongside its residential streets. Borehamwood's housing stock is largely post-war, generating a steady, high-volume flow of extensions, loft conversions, and garage conversions. Radlett, Bushey, and Potters Bar, by contrast, are among Hertfordshire's more affluent commuter towns, with larger detached and period housing sitting mostly within London's Metropolitan Green Belt, which restricts new-build development outside existing settlement boundaries and keeps a large share of construction activity focused on extending and refurbishing existing homes.
Project Type Breakdown
Here's a breakdown of the most common types of construction projects in Hertsmere over the past 30 days.
In Hertsmere, Extensions are the most common project type, appearing in 71 of the 108 leads tracked in the last 30 days, with Loft Conversions also showing consistent demand alongside Garage Conversions. 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 Hertsmere
The architects and planning consultants submitting the most construction-related applications in Hertsmere, based on recent planning records.
- 1Dimensions- Planning&Architecture
- 2A.J Ferryman & Associates
- 3Steene Associates (Architects) Ltd
- 4PLK Design Limited
- 5MFS Resolution
- 6The Loft Converter
- 7Architects Corporation Ltd
- 8KDA Designs LTD
- 9KDB Building Designs Ltd
- 10Middlesex & Herts
Project Value Insights
Understanding typical project values in Hertsmere helps you prioritise the most profitable leads and manage your workload effectively. These ranges are a general guide to the scale of work involved — individual project costs vary by design, specification, and site conditions.
- £25k – £50kSmall extensions, porches, and internal alterations
- £50k – £100kRear extensions and loft conversions
- £100k – £250kLarge extensions and full property refurbishments
- £250k+New builds and high-end residential projects
Higher-value projects are especially common in Radlett, Bushey, and Potters Bar, where larger properties and more extensive upgrades are the norm.
Recent Planning Applications in Hertsmere
Extensions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Wrap-Around Extension | 45 Highview Gardens Potters Bar Hertfordshire EN6 5PN | £100k–£250k | Construction of part single, part two storey side and rear extension. | Approved |
| Rear Extension | 23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG | £50k–£100k | Retrospective application for alterations to existing first floor rear extension and reduction of bulk to loft and roof. | Approved |
| Single Storey Side Extension | 2 Rosebery Road Bushey Hertfordshire WD23 1DA | £50k–£100k | Single storey side extension. | Approved |
| Wrap-Around Extension | Hertsmere | £100k–£250k | Construction of a two-storey side and rear extension along with a single-storey outbuilding. | Approved |
| Double Storey Extension | 89 Hatfield Road Potters Bar Hertfordshire EN6 1HZ | £100k–£250k | Demolition of existing garage and construction of part single, part two storey extension. | Approved |
Wrap-Around Extension
45 Highview Gardens Potters Bar Hertfordshire EN6 5PN
Construction of part single, part two storey side and rear extension.
Rear Extension
23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG
Retrospective application for alterations to existing first floor rear extension and reduction of bulk to loft and roof.
Single Storey Side Extension
2 Rosebery Road Bushey Hertfordshire WD23 1DA
Single storey side extension.
Wrap-Around Extension
Hertsmere
Construction of a two-storey side and rear extension along with a single-storey outbuilding.
Double Storey Extension
89 Hatfield Road Potters Bar Hertfordshire EN6 1HZ
Demolition of existing garage and construction of part single, part two storey extension.
Loft Conversions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Loft Conversion | Hertsmere | £250k–£1m | First floor rear extension and loft conversion with rooflights and dormer. | Approved |
| Loft Conversion | 34 Elmroyd Avenue Potters Bar Hertfordshire EN6 2EE | £50k–£100k | Loft conversion to habitable space including a rear dormer. | Approved |
| Loft Conversion | 29 Willow Way Potters Bar Hertfordshire EN6 2PR | £50k–£100k | Single-storey rear extension with fenestration alterations and extension of internal loft space. | Approved |
| Loft Conversion | 27 Park View Potters Bar Hertfordshire EN6 5PY | £100k–£250k | Demolition of existing conservatory to allow part single/part two-storey side and rear extensions, single-storey front porch, and loft conversion with rear dormer and three front rooflights. | Approved |
| Loft Conversion | 2 The Drive Park Avenue Bushey Hertfordshire WD23 2BJ | £50k–£100k | Alter existing front dormer, add rear dormer and install rear and side rooflights. | Approved |
Loft Conversion
Hertsmere
First floor rear extension and loft conversion with rooflights and dormer.
Loft Conversion
34 Elmroyd Avenue Potters Bar Hertfordshire EN6 2EE
Loft conversion to habitable space including a rear dormer.
Loft Conversion
29 Willow Way Potters Bar Hertfordshire EN6 2PR
Single-storey rear extension with fenestration alterations and extension of internal loft space.
Loft Conversion
27 Park View Potters Bar Hertfordshire EN6 5PY
Demolition of existing conservatory to allow part single/part two-storey side and rear extensions, single-storey front porch, and loft conversion with rear dormer and three front rooflights.
Loft Conversion
2 The Drive Park Avenue Bushey Hertfordshire WD23 2BJ
Alter existing front dormer, add rear dormer and install rear and side rooflights.
Other Projects
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| New Build | 69 Deacons Hill Road Elstree Borehamwood Hertfordshire WD6 3HZ | £250k–£1m | Demolition of existing two storey detached dwelling and construction of a new two storey detached dwelling with loft accommodation and dormers. | Withdrawn |
| Heritage | Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG | £250k–£1m | Repair and conservation works to Tyttenhanger House including roof structure and clock tower. | Approved |
| Heritage | Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG | £100k–£250k | Repair and conservation works to Tyttenhanger House including roof structure and photovoltaic panels. | Approved |
| Heritage | Flat 5 Wessex House Marlborough Drive Bushey Hertfordshire WD23 2RP | £25k–£50k | Replacement of existing double glazed units in ensuite bathroom. | Approved |
| Garden Room | 52 Bendysh Road Bushey Hertfordshire WD23 2HY | £25k–£50k | Erection of outbuilding in rear garden. | Approved |
New Build
69 Deacons Hill Road Elstree Borehamwood Hertfordshire WD6 3HZ
Demolition of existing two storey detached dwelling and construction of a new two storey detached dwelling with loft accommodation and dormers.
Heritage
Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG
Repair and conservation works to Tyttenhanger House including roof structure and clock tower.
Heritage
Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG
Repair and conservation works to Tyttenhanger House including roof structure and photovoltaic panels.
Heritage
Flat 5 Wessex House Marlborough Drive Bushey Hertfordshire WD23 2RP
Replacement of existing double glazed units in ensuite bathroom.
Garden Room
52 Bendysh Road Bushey Hertfordshire WD23 2HY
Erection of outbuilding in rear garden.
Data sourced from Hertsmere Borough Council planning records and refreshed regularly.
Featured Projects
A snapshot of recent construction opportunities across Hertsmere.
Demolition of existing two storey detached dwelling and construction of two storey detached dwelling with accommodation at loft level, front and rear dormers and 4x rooflights to each side elevation, associated landscaping, parking and ancillary works, including cycle and bin storage.
£250k–£1m69 Deacons Hill Road Elstree Borehamwood Hertfordshire WD6 3HZ
Demolition of existing two storey detached dwelling and construction of a new two storey detached dwelling with loft accommodation and dormers.
Construction of part single, part two storey side and rear extension with associated roof works.
£100k–£250k45 Highview Gardens Potters Bar Hertfordshire EN6 5PN
Construction of part single, part two storey side and rear extension.
Partially retrospective application for alterations to existing first floor rear extension, and reduction to bulk of rear extension to loft and roof, to regularise works carried out following approval of application reference 21/0874/FUL.
£50k–£100k23 Hillside Avenue Borehamwood Hertfordshire WD6 1HG
Retrospective application for alterations to existing first floor rear extension and reduction of bulk to loft and roof.
First floor rear extension. Conversion of loft to habitable space to include rooflights and rear dormer. Conversion of garage to habitable space to include replacement of garage door with windows. Alterations to front facade including new bay windows. Alterations to front entrance doors and construction of front portico. New brick slip facade, alterations to fenestration. Construction of single storey outbuilding, removal of existing swimming pool enclosure.
£250k–£1mHertsmere
First floor rear extension and loft conversion with rooflights and dormer.
Examples of projects at an early stage before wider competition builds.
See All 108 Construction Leads in Hertsmere
Unlock full details and connect with homeowners while projects are still taking shape.
Get Access NowPlanning Application Status in Hertsmere
50%
Approved
48%
Pending
2%
Refused
In Hertsmere, 50% of planning applications are approved, 48% are still pending, and 2% are refused. Pending applications can give builders an opportunity to make contact while projects are still at an early stage.
Getting in touch earlier puts you in a stronger position before others step in.
Based on planning applications submitted over the last 30 days.
Planning Approval Times in Hertsmere
Among applications tracked by BuildAlert in Hertsmere, the median time from submission to decision is 8 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 Hertsmere
In Hertsmere, 77% of planning applications are domestic and 23% are commercial. Both segments offer opportunities depending on the scale of work you take on.
Demand for Building Work in Hertsmere
Borehamwood's post-war housing stock supports a high volume of standard extension and loft conversion work, while the borough's film and television industry continues to bring commercial investment into the area around the studios. Radlett, Bushey, and Potters Bar's Green Belt setting and larger, more established housing stock support consistently higher-spec extension and refurbishment work than Borehamwood's more standard streets, giving builders across the borough exposure to both ends of the market.
How to Win Jobs in Hertsmere
Contact Homeowners Early
Planning applications highlight upcoming work, giving you a chance to get in touch before builders are shortlisted.
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 simple steps to start winning more construction work in Hertsmere.
Track Planning Applications
We monitor Hertsmere Borough Council and surrounding authorities daily for new residential projects.
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Contact Homeowners
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Nearby Areas
Builders based in Hertsmere often take on work in nearby Hertfordshire areas such as St Albans, Dacorum, and Welwyn Hatfield, helping maintain a consistent flow of projects.
Frequently Asked Questions
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