Updated 25 August 2026 · 25 new leads in the last 30 days
Construction Leads in Harlow
Find construction leads in Harlow from live planning applications across the town. See which homeowners are preparing building projects and make contact while they are still deciding who to hire.
- Planning applications pulled directly from Harlow Council records
- Act on projects before homeowners start asking for quotes
- Direct outreach — no lead-sharing platforms or bidding involved
Planning data sourced from Harlow Council records and refreshed on a regular basis.
25
New Leads (30 Days)
£185,500
Average Project Value
9
High Value Projects
Over £100k
Extensions
Most Common Project
Construction Trends in Harlow
Harlow is largely a new town, which means much of the housing stock dates from the 1950s through to the 1980s — terraced homes, low-rise flats, and semi-detached council-era houses spread across distinct neighbourhoods. The planned layout leaves less room for wraparound extensions, but rear single-storey additions are common. Garage conversions are particularly active here given the number of properties built with integral or detached garages. There is also growing activity around full internal reconfigurations as residents bring older layouts up to modern standards.
Project Type Breakdown
A breakdown of recent planning submissions across Harlow, based on applications filed with the council.
In Harlow, Extensions account for the majority of planning applications (17 of 33 in the last 30 days), with Loft Conversions also showing consistent demand alongside Porches.
Most Active Planning Agents in Harlow
The architects and planning agents submitting the most applications in Harlow, based on recent planning records.
- 1Harlow Council Environmental Services
- 2JMS Planning & Development Ltd
- 3SMART SKILLS LTD
- 4Hill Partnerships
- 5Herts&EssexTree Care
- 6Carter Jonas
- 7NAPC
- 8Ceres Property
- 9Quod
- 10DHA Planning
Project Value Insights
Project values in Harlow tend to be on the practical end of the spectrum — most jobs are focused, well-defined, and sit in the lower-to-mid range for Essex.
- £15k – £35kGarage conversions, utility extensions, and small internal works
- £35k – £70kSingle-storey rear extensions and kitchen refits
- £70k – £150kDouble extensions, full refurbishments, and structural alterations
- £150k+New build plots and larger residential development projects
Higher-value work tends to come from the newer residential developments around Church Langley and Katherines, where detached homes command larger budgets than the older town-centre estates.
Recent Planning Applications in Harlow
Extensions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Single Storey Rear Extension | Harlow | £50k–£100k | Demolition of existing rear porch and erection of a single storey rear extension. | Approved |
| Single Storey Rear Extension | Harlow | £50k–£100k | Construction of a single storey rear extension with internal remodelling. | Approved |
| Single Storey Front Extension | Harlow | £100k–£250k | Construction of a single storey front extension, rear extension, and part first floor extension. | Approved |
| Single Storey Rear Extension | Harlow | Under £25k | Approval of details reserved by condition for single storey flat roof rear extension. | Approved |
| Double Storey Extension | Harlow | £100k–£250k | Construction of a two-storey rear extension and first-floor front dormer extension. | Refused |
Single Storey Rear Extension
Harlow
Demolition of existing rear porch and erection of a single storey rear extension.
Single Storey Rear Extension
Harlow
Construction of a single storey rear extension with internal remodelling.
Single Storey Front Extension
Harlow
Construction of a single storey front extension, rear extension, and part first floor extension.
Single Storey Rear Extension
Harlow
Approval of details reserved by condition for single storey flat roof rear extension.
Double Storey Extension
Harlow
Construction of a two-storey rear extension and first-floor front dormer extension.
Loft Conversions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Loft Conversion | Harlow | £50k–£100k | Proposed loft conversion with addition of rear dormer. | Approved |
| Loft Conversion | 101 Fennells Harlow Essex CM19 4RW | £50k–£100k | Proposed loft conversion with rear dormer and skylights. | Approved |
| Loft Conversion | 7 Greenfinch Way Newhall Harlow Essex CM17 9FT | £50k–£100k | Construction of a side-facing subordinate dormer for a loft conversion with four roof-slope skylight windows. | Unknown |
| Loft Conversion | 18 Whitewaits Harlow Essex CM20 3LJ | £50k–£100k | Proposed lawful development certificate for a single-storey rear extension and loft conversion incorporating a rear-facing box dormer. | Unknown |
| Loft Conversion | 74 Ashworth Place Harlow Essex CM17 9PW | £100k–£250k | Proposed single-storey 3m rear extension with flat roof and roof lantern; loft conversion including rear dormer and front rooflights (certificate application). | Unknown |
Loft Conversion
Harlow
Proposed loft conversion with addition of rear dormer.
Loft Conversion
101 Fennells Harlow Essex CM19 4RW
Proposed loft conversion with rear dormer and skylights.
Loft Conversion
7 Greenfinch Way Newhall Harlow Essex CM17 9FT
Construction of a side-facing subordinate dormer for a loft conversion with four roof-slope skylight windows.
Loft Conversion
18 Whitewaits Harlow Essex CM20 3LJ
Proposed lawful development certificate for a single-storey rear extension and loft conversion incorporating a rear-facing box dormer.
Loft Conversion
74 Ashworth Place Harlow Essex CM17 9PW
Proposed single-storey 3m rear extension with flat roof and roof lantern; loft conversion including rear dormer and front rooflights (certificate application).
Other Projects
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Garage Conversion | Harlow | £25k–£50k | Conversion of internal garage to office space. | Approved |
| Garage Conversion | Harlow | £25k–£50k | Integral garage conversion and enclosure of covered porch area. | Approved |
| New Build | Former 339 Northbrooks Harlow Essex CM19 4DP | £250k–£1m | Approval of details reserved by condition for a landscape and ecological plan. | Approved |
| Heritage | The Museum Of Harlow Muskham Road Harlow Essex CM20 2LF | £100k–£250k | Approval of details (Condition 7) for repairs to the museum's external pitched and flat roofs pursuant to listed building consent HW/LBC/24/00374. | Unknown |
| Garden Room | Beckmead Moundwood Academy Commonside Road Harlow Essex CM18 7EZ | £25k–£50k | Retention of a single-storey Portakabin modular school building for a temporary period of 12 months. | Unknown |
Garage Conversion
Harlow
Conversion of internal garage to office space.
Garage Conversion
Harlow
Integral garage conversion and enclosure of covered porch area.
New Build
Former 339 Northbrooks Harlow Essex CM19 4DP
Approval of details reserved by condition for a landscape and ecological plan.
Heritage
The Museum Of Harlow Muskham Road Harlow Essex CM20 2LF
Approval of details (Condition 7) for repairs to the museum's external pitched and flat roofs pursuant to listed building consent HW/LBC/24/00374.
Garden Room
Beckmead Moundwood Academy Commonside Road Harlow Essex CM18 7EZ
Retention of a single-storey Portakabin modular school building for a temporary period of 12 months.
Planning data sourced from Harlow Council records and refreshed on a regular basis.
Featured Projects
Recent planning activity from across Harlow, highlighting projects at an early stage.
Loft Conversion & addition of rear dormer
£50k–£100kHarlow
Proposed loft conversion with addition of rear dormer.
Demolition of existing rear porch and erection of a single storey rear extension with flat roof
£50k–£100kHarlow
Demolition of existing rear porch and erection of a single storey rear extension.
Construction of a single storey rear and side infill extension with internal remodelling (Amended)
£50k–£100kHarlow
Construction of a single storey rear extension with internal remodelling.
Construction of a single storey front extension, single storey rear extension, and part first floor extension. Application of render to the side wall
£100k–£250kHarlow
Construction of a single storey front extension, rear extension, and part first floor extension.
Early-stage applications from across the town — most still in the planning phase.
See All 25 Construction Leads in Harlow
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Get Access NowPlanning Application Outcomes in Harlow
85%
Approved
0%
Pending
15%
Rejected
Most planning applications in Harlow 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 application outcomes over the last 3 months.
Planning Approval Times in Harlow
In Harlow, most planning applications are decided within 6 weeks. Smaller projects like extensions tend to be approved more quickly, while larger developments can take longer.
Domestic vs Commercial Projects in Harlow
In Harlow, 76% of planning applications are domestic and 24% are commercial. Both segments offer opportunities depending on the scale of work you take on.
Demand for Building Work in Harlow
Harlow has seen renewed investment interest as transport links to London have improved, bringing in buyers who see value in the town's relatively affordable prices. That uptick in ownership has translated into building activity — people who have bought recently are now looking to make the homes work better for them. Projects tend to be practical in scope rather than aspirational, which suits builders who can price sharp and move quickly through jobs.
How to Win Jobs in Harlow
Contact Homeowners Early
New planning applications flag who is preparing to build — giving you the chance to make contact before anyone else does.
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
How to use planning data to find and win construction work in Harlow.
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Nearby Areas
Builders based in or around Harlow often extend into Epping Forest and Hertfordshire. The towns below generate enough activity to keep a pipeline running alongside local work.
Frequently Asked Questions
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