Updated 22 October 2026 · 123 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.
123
New Leads (30 Days)
£123,258
Average Project Value
38
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 73 of the 123 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
- 3Inigo Architecture Ltd
- 4ArchiTech Ltd.
- 5D.Chandler Architectural Design Ltd.
- 6RLP Surveyors
- 7Campbell McCrae Ltd
- 8Boyd Seddon Architect
- 9Houghton Architecture Ltd
- 10Kay Pilsbury Thomas Architects
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 |
|---|---|---|---|---|
| Wrap-Around Extension | 17 Hodwell Ashwell Baldock Hertfordshire SG7 5QQ | £100k–£250k | Two storey side/rear extension and single storey side extension with various alterations. | Approved |
| 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 |
| Single Storey Front Extension | North Hertfordshire | £50k–£100k | Single storey front infill extension and garage conversion with alterations. | Approved |
| Single Storey Side Extension | 49 Gaping Lane Hitchin Hertfordshire SG5 2JE | £25k–£50k | Full householder permission for a single-storey side extension following demolition of the existing side element. | Approved |
Wrap-Around Extension
17 Hodwell Ashwell Baldock Hertfordshire SG7 5QQ
Two storey side/rear extension and single storey side extension with various alterations.
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.
Single Storey Front Extension
North Hertfordshire
Single storey front infill extension and garage conversion with alterations.
Single Storey Side Extension
49 Gaping Lane Hitchin Hertfordshire SG5 2JE
Full householder permission for a single-storey side extension following demolition of the existing side element.
Loft Conversions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Loft Conversion | Letchworth | £100k–£250k | Two-storey and part single-storey rear extension, insertion of rooflights to facilitate loft conversion, fenestration alterations and demolition of existing rear extensions. | 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 | Hitchin | £50k–£100k | Raise roof height with rear dormer and front rooflight to facilitate loft conversion; removal of chimney. | Approved |
| Loft Conversion | North Hertfordshire | £50k–£100k | Full householder application for single-storey infill side extension linking garage to dwelling, insertion of dormer windows to rear and side roofslopes, and fenestration alterations. | 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. | Approved |
Loft Conversion
Letchworth
Two-storey and part single-storey rear extension, insertion of rooflights to facilitate loft conversion, fenestration alterations and demolition of existing rear extensions.
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
Hitchin
Raise roof height with rear dormer and front rooflight to facilitate loft conversion; removal of chimney.
Loft Conversion
North Hertfordshire
Full householder application for single-storey infill side extension linking garage to dwelling, insertion of dormer windows to rear and side roofslopes, and fenestration alterations.
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 |
|---|---|---|---|---|
| Garden Room | Shell Petrol Station Bedford Road Hitchin Hertfordshire SG5 2TY | £250k–£1m | Erection of retail building and detached bin store with installation of jet washes. | Approved |
| New Build | North Hertfordshire | £250k–£1m | Erection of 5 detached dwellings with associated car ports and landscaping. | Approved |
| Heritage | 1 John Street Royston Hertfordshire SG8 9BE | Under £25k | Details reserved by condition for retention of all 4-panel doors of listed building consent. | 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 |
| Garden Room | Pendmere Fore Street Weston Hertfordshire SG4 7AS | £25k–£50k | Erection of a detached garden room/office in the front garden. | Approved |
Garden Room
Shell Petrol Station Bedford Road Hitchin Hertfordshire SG5 2TY
Erection of retail building and detached bin store with installation of jet washes.
New Build
North Hertfordshire
Erection of 5 detached dwellings with associated car ports and landscaping.
Heritage
1 John Street Royston Hertfordshire SG8 9BE
Details reserved by condition for retention of all 4-panel doors of listed building consent.
Garden Room
North Hertfordshire
Erection of a detached three bay cart lodge following demolition of an existing outbuilding and associated cellar.
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 retail building, detached bin store, replacement pumps and installation of two machine jet washes, and associated works following demolition of the existing outbuilding, canopy link and plant room. Provision of two car parking spaces and cycle parking. (Amended plans received 15/09/2026).
£250k–£1mShell Petrol Station Bedford Road Hitchin Hertfordshire SG5 2TY
Erection of retail building and detached bin store with installation of jet washes.
Erection of 5 detached dwellings (use class C3) with associated car ports, access, parking, EV charging points and landscaping following demolition of no. 2 existing equestrian buildings.
£250k–£1mNorth Hertfordshire
Erection of 5 detached dwellings with associated car ports and landscaping.
Details Reserved by Condition 4: (Retention of all 4-panel doors) of Listed Building Consent 25/02331/LBC granted 14/04/2026 (as amended by plans received on 24/06/2026, 04/08/2026, 25 and 26/08/2026).
Under £25k1 John Street Royston Hertfordshire SG8 9BE
Details reserved by condition for retention of all 4-panel doors of listed building consent.
Two storey side/rear extension following demolition of existing garage/workshop. Covered front porch and alterations to fenestration. Installation of vehicular and pedestrian gates, brick piers, brick boundary walls and timber fencing. Erection of detached shed, external rendering and cladding. Soft and hard landscaping works (as amended by plan received on 14/08/2026).
£100k–£250k17 Hodwell Ashwell Baldock Hertfordshire SG7 5QQ
Two storey side/rear extension and single storey side extension with various alterations.
Examples of projects at an early stage before wider competition builds.
See All 123 Construction Leads in North Hertfordshire
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Get Access NowPlanning Application Status in North Hertfordshire
56%
Approved
39%
Pending
5%
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, the vast majority (81%) 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 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.
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We monitor North Hertfordshire Council and surrounding authorities daily for new residential projects.
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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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