Updated 8 October 2026 · 126 new leads in the last 30 days
Construction Leads in North Hertfordshire
Access construction leads in North Hertfordshire by tracking newly submitted planning applications. See which homeowners and developers across Letchworth, Hitchin, and Baldock are preparing extensions, loft conversions, and new builds, and get in touch before they begin shortlisting builders.
- New planning applications added frequently from North Hertfordshire Council
- Connect with homeowners at the early planning stage
- No shared enquiries or competitive bidding
Data sourced from North Hertfordshire Council planning records and refreshed regularly.
126
New Leads (30 Days)
£115,142
Average Project Value
35
High Value Projects
Over £100k
Extensions
Most Common Project
Construction Trends in North Hertfordshire
North Hertfordshire is home to Letchworth Garden City, founded in 1903 as the world's first garden city, where the Letchworth Garden City Heritage Foundation still manages much of the estate alongside the council's own planning controls, adding an extra layer of design scrutiny to alterations and extensions. Hitchin, a historic market town known for its lavender fields, has its own conservation area generating a steady flow of heritage-sensitive renovation work. The district's biggest change in the years ahead is Baldock, where the council's Growing Baldock masterplan — approved in 2025 — will deliver up to 3,300 new homes on land to the north and east of the town, described locally as the largest development project in North Hertfordshire for decades. Royston, on the county border with Cambridgeshire, keeps a more traditional market-town character generating standard extension and loft conversion work.
Project Type Breakdown
Here's a breakdown of the most common types of construction projects in North Hertfordshire over the past 30 days.
In North Hertfordshire, Extensions are the most common project type, appearing in 69 of the 126 leads tracked in the last 30 days, with Heritages 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 North Hertfordshire
The architects and planning consultants submitting the most construction-related applications in North Hertfordshire, based on recent planning records.
- 1Pentangle Design Group
- 2CROE Architects
- 3ArchiTech Ltd.
- 4Inigo Architecture Ltd
- 5Houghton Architecture Ltd
- 6RLP Surveyors
- 7Campbell McCrae Ltd
- 8D.Chandler Architectural Design Ltd.
- 9charlotte Fausset Architect
- 10Rejig Homes Ltd
Project Value Insights
Understanding typical project values in North Hertfordshire 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 often found in Letchworth Garden City and Hitchin, where period properties and heritage foundation oversight support larger renovation budgets.
Recent Planning Applications in North Hertfordshire
Extensions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Double Storey Extension | North Hertfordshire | £100k–£250k | Two storey with Juliet balcony and single storey rear extension after demolishing existing conservatory. | Approved |
| Single Storey Front Extension | North Hertfordshire | £100k–£250k | Single storey side and front extension linking dwelling to garage, with porch extension and alterations. | Approved |
| Double Storey Extension | 1 Matthew Gate Hitchin Hertfordshire SG4 9EQ | £100k–£250k | Part first floor and two-storey side extension above existing garage. | Approved |
| Single Storey Rear Extension | Letchworth | £50k–£100k | Single storey rear extension. | Approved |
| Wrap-Around Extension | 55 Benslow Lane Hitchin Hertfordshire SG4 9RD | £100k–£250k | Two storey front extension and part single storey rear and side extensions with dormer window. | Approved |
Double Storey Extension
North Hertfordshire
Two storey with Juliet balcony and single storey rear extension after demolishing existing conservatory.
Single Storey Front Extension
North Hertfordshire
Single storey side and front extension linking dwelling to garage, with porch extension and alterations.
Double Storey Extension
1 Matthew Gate Hitchin Hertfordshire SG4 9EQ
Part first floor and two-storey side extension above existing garage.
Single Storey Rear Extension
Letchworth
Single storey rear extension.
Wrap-Around Extension
55 Benslow Lane Hitchin Hertfordshire SG4 9RD
Two storey front extension and part single storey rear and side extensions with dormer window.
Loft Conversions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Loft Conversion | 7 Uplands Avenue Hitchin Hertfordshire SG4 9NH | £50k–£100k | Installation of a box dormer to side roofslope to convert loft into habitable accommodation. | Approved |
| Loft Conversion | 385 Western Way Letchworth Garden City Hertfordshire SG6 4SS | £50k–£100k | Lawful development certificate proposed for single-storey side extension, front porch, two front rooflights and rear box dormer to convert loft to habitable space. | Refused |
| Loft Conversion | 23 Watton Road Knebworth Hertfordshire SG3 6AH | £50k–£100k | Rear roof extension with new rear dormer and side rooflights to provide additional first-floor accommodation following removal of existing rear dormer. | Approved |
| Loft Conversion | North Hertfordshire | £100k–£250k | Single-storey rear extension, replacement rear dormer windows and front dormer roof, new front rooflights, installation of rear and side solar panels, alterations to fenestration and external render, and removal of chimneys. | Approved |
| Loft Conversion | 31 York Road Hitchin Hertfordshire SG5 1XB | £100k–£250k | Single-storey rear extension, two front rooflights and L-shaped rear dormer to enable loft conversion; alterations to fenestration. | Pending |
Loft Conversion
7 Uplands Avenue Hitchin Hertfordshire SG4 9NH
Installation of a box dormer to side roofslope to convert loft into habitable accommodation.
Loft Conversion
385 Western Way Letchworth Garden City Hertfordshire SG6 4SS
Lawful development certificate proposed for single-storey side extension, front porch, two front rooflights and rear box dormer to convert loft to habitable space.
Loft Conversion
23 Watton Road Knebworth Hertfordshire SG3 6AH
Rear roof extension with new rear dormer and side rooflights to provide additional first-floor accommodation following removal of existing rear dormer.
Loft Conversion
North Hertfordshire
Single-storey rear extension, replacement rear dormer windows and front dormer roof, new front rooflights, installation of rear and side solar panels, alterations to fenestration and external render, and removal of chimneys.
Loft Conversion
31 York Road Hitchin Hertfordshire SG5 1XB
Single-storey rear extension, two front rooflights and L-shaped rear dormer to enable loft conversion; alterations to fenestration.
Other Projects
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| New Build | Bramble Bank Bedford Road Holwell Hitchin Hertfordshire SG5 3RX | Variation of conditions for previously approved two detached dwellings. | Approved | |
| New Build | Land West Of Tuthill House Kelshall Tops Therfield Hertfordshire SG8 9PT | Variation of condition for previously approved plans for three detached dwellings. | Approved | |
| Garden Room | North Hertfordshire | £50k–£100k | Erection of a detached three bay cart lodge following demolition of an existing outbuilding and associated cellar. | Approved |
| Heritage | Hitchin | £25k–£50k | Installation of an EV charger on the front elevation of a listed building. | Approved |
| Garden Room | Pendmere Fore Street Weston Hertfordshire SG4 7AS | £25k–£50k | Erection of a detached garden room/office in the front garden. | Approved |
New Build
Bramble Bank Bedford Road Holwell Hitchin Hertfordshire SG5 3RX
Variation of conditions for previously approved two detached dwellings.
New Build
Land West Of Tuthill House Kelshall Tops Therfield Hertfordshire SG8 9PT
Variation of condition for previously approved plans for three detached dwellings.
Garden Room
North Hertfordshire
Erection of a detached three bay cart lodge following demolition of an existing outbuilding and associated cellar.
Heritage
Hitchin
Installation of an EV charger on the front elevation of a listed building.
Garden Room
Pendmere Fore Street Weston Hertfordshire SG4 7AS
Erection of a detached garden room/office in the front garden.
Data sourced from North Hertfordshire Council planning records and refreshed regularly.
Featured Projects
A snapshot of recent construction opportunities across North Hertfordshire.
Erection of detached three bay cart lodge following demolition of existing outbuilding and associated cellar. Installation of external storage area and hardstanding to provide additional parking spaces.
£50k–£100kNorth Hertfordshire
Erection of a detached three bay cart lodge following demolition of an existing outbuilding and associated cellar.
Two storey with Juliet balcony and single storey rear extension following demolition of existing rear conservatory. Installation of first floor side window.
£100k–£250kNorth Hertfordshire
Two storey with Juliet balcony and single storey rear extension after demolishing existing conservatory.
Installation of EV charger to front elevation.
£25k–£50kHitchin
Installation of an EV charger on the front elevation of a listed building.
Single storey side and front extension linking dwelling to existing detached garage and front porch extension with access steps following demolition of existing conservatory and porch. Insertion of two storey front bay window following removal of existing ground floor bay window. Alterations to fenestration. Installation of rear raised terrace and steps. Alterations to existing garage fenestration to facilitate partial conversion of garage into shower room.
£100k–£250kNorth Hertfordshire
Single storey side and front extension linking dwelling to garage, with porch extension and alterations.
Examples of projects at an early stage before wider competition builds.
See All 126 Construction Leads in North Hertfordshire
Unlock full details and connect with homeowners while projects are still taking shape.
Get Access NowPlanning Application Status in North Hertfordshire
53%
Approved
44%
Pending
3%
Refused
Most planning applications in North Hertfordshire are approved, meaning a large proportion of these projects go ahead and become real building jobs. This creates strong opportunities for builders who contact homeowners early.
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 North Hertfordshire
Among applications tracked by BuildAlert in North Hertfordshire, the median time from submission to decision is 7 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 North Hertfordshire
In North Hertfordshire, 78% of planning applications are domestic and 22% are commercial. Both segments offer opportunities depending on the scale of work you take on.
Demand for Building Work in North Hertfordshire
Baldock's Growing Baldock masterplan is set to become North Hertfordshire's dominant new-build story, with up to 3,300 homes, new schools, and employment space planned on land north and east of the town — a long-running pipeline of groundworks and finishing trade work as the site comes forward in phases. Letchworth's heritage foundation oversight adds a design-led dimension to renovation and extension work there, while Hitchin and Royston's older housing stock supports a steadier, more traditional extension and loft conversion market.
How to Win Jobs in North Hertfordshire
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 North Hertfordshire.
Track Planning Applications
We monitor North Hertfordshire Council and surrounding authorities daily for new residential projects.
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Contact Homeowners
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Nearby Areas
Builders based in North Hertfordshire often take on work in nearby Hertfordshire areas such as Stevenage and East Hertfordshire, helping maintain a consistent flow of projects.
Frequently Asked Questions
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