Updated 22 October 2026 · 128 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.
128
New Leads (30 Days)
£135,645
Average Project Value
39
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 81 of the 128 leads tracked in the last 30 days, with Loft Conversions 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 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
- 4Architects Corporation Ltd
- 5HOME EXTENSION DESIGNS LTD
- 6MFS Resolution
- 7PLK Design Limited
- 8The Loft Converter
- 9KDA Designs LTD
- 10Signature Buildings Ltd
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 |
|---|---|---|---|---|
| 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 Rear Extension | 72 Oulton Crescent Potters Bar Hertfordshire EN6 3EG | £50k–£100k | Construction of a single storey rear extension and alterations to fenestration. | Approved |
| Single Storey Side Extension | 2 Rosebery Road Bushey Hertfordshire WD23 1DA | £50k–£100k | Single storey side extension. | Approved |
| Wrap-Around Extension | 56 Williams Way Radlett Hertfordshire WD7 7HB | £100k–£250k | Construction of single storey side and rear extension, and loft conversion with dormers. | Approved |
| Wrap-Around Extension | 8 Avenue Rise Bushey Hertfordshire WD23 3AS | £100k–£250k | Single storey side and rear extension with patio and landscaping. | Approved |
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 Rear Extension
72 Oulton Crescent Potters Bar Hertfordshire EN6 3EG
Construction of a single storey rear extension and alterations to fenestration.
Single Storey Side Extension
2 Rosebery Road Bushey Hertfordshire WD23 1DA
Single storey side extension.
Wrap-Around Extension
56 Williams Way Radlett Hertfordshire WD7 7HB
Construction of single storey side and rear extension, and loft conversion with dormers.
Wrap-Around Extension
8 Avenue Rise Bushey Hertfordshire WD23 3AS
Single storey side and rear extension with patio and landscaping.
Loft Conversions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Loft Conversion | 69 Elmroyd Avenue Potters Bar Hertfordshire EN6 2EF | £100k–£250k | Demolish existing garage, store and conservatory to construct a single-storey side and rear extension and extend loft with two side dormers, rooflights and associated roof alterations. | 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 | 51 Hartforde Road Borehamwood Hertfordshire WD6 5HX | £50k–£100k | Certificate (proposed) for loft conversion with hip-to-gable roof alteration and rear dormer to form habitable space. | Approved |
| Loft Conversion | 18 Kemprow Aldenham Watford Hertfordshire WD25 8BP | £100k–£250k | Single-storey rear extension, new porch, raised roof with loft conversion including front dormer and 5 rooflights, and associated external works. | Approved |
| Loft Conversion | 54 The Ridgeway Radlett Hertfordshire WD7 8PS | £250k–£1m | Demolish existing dwelling and construct a replacement semi‑detached dwelling with loft accommodation, single‑storey rear outbuilding and new boundary works and gates. | Approved |
Loft Conversion
69 Elmroyd Avenue Potters Bar Hertfordshire EN6 2EF
Demolish existing garage, store and conservatory to construct a single-storey side and rear extension and extend loft with two side dormers, rooflights and associated roof alterations.
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
51 Hartforde Road Borehamwood Hertfordshire WD6 5HX
Certificate (proposed) for loft conversion with hip-to-gable roof alteration and rear dormer to form habitable space.
Loft Conversion
18 Kemprow Aldenham Watford Hertfordshire WD25 8BP
Single-storey rear extension, new porch, raised roof with loft conversion including front dormer and 5 rooflights, and associated external works.
Loft Conversion
54 The Ridgeway Radlett Hertfordshire WD7 8PS
Demolish existing dwelling and construct a replacement semi‑detached dwelling with loft accommodation, single‑storey rear outbuilding and new boundary works and gates.
Other Projects
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Garden Room | 16 New Road Shenley Radlett Hertfordshire WD7 9EA | £25k–£50k | Erection of a single storey outbuilding in the rear garden. | Approved |
| 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 |
| Garden Room | Hertsmere | Under £25k | Retention of existing self-contained residential outbuilding as lawful development. | Approved |
| Garden Room | The Studio Hilfield Lane Aldenham Watford Hertfordshire WD25 8PF | £25k–£50k | Construction of a single storey outbuilding. | Approved |
| Garden Room | 18 Kemprow Aldenham Watford Hertfordshire WD25 8BP | £25k–£50k | Construction of a single storey outbuilding with a Certificate of Lawful Development. | Approved |
Garden Room
16 New Road Shenley Radlett Hertfordshire WD7 9EA
Erection of a single storey outbuilding in the rear garden.
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.
Garden Room
Hertsmere
Retention of existing self-contained residential outbuilding as lawful development.
Garden Room
The Studio Hilfield Lane Aldenham Watford Hertfordshire WD25 8PF
Construction of a single storey outbuilding.
Garden Room
18 Kemprow Aldenham Watford Hertfordshire WD25 8BP
Construction of a single storey outbuilding with a Certificate of Lawful Development.
Data sourced from Hertsmere Borough Council planning records and refreshed regularly.
Featured Projects
A snapshot of recent construction opportunities across Hertsmere.
Erection of a single storey outbuilding in the rear garden.
£25k–£50k16 New Road Shenley Radlett Hertfordshire WD7 9EA
Erection of a single storey outbuilding in the rear garden.
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.
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.
Retention of existing self-contained residential outbuilding / dwelling Certificate of Lawful Development (Existing).
Under £25kHertsmere
Retention of existing self-contained residential outbuilding as lawful development.
Examples of projects at an early stage before wider competition builds.
See All 128 Construction Leads in Hertsmere
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Get Access NowPlanning Application Status in Hertsmere
46%
Approved
53%
Pending
1%
Refused
In Hertsmere, 46% of planning applications are approved, 53% are still pending, and 1% 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, the vast majority (84%) 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 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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