Updated 8 October 2026 · 90 new leads in the last 30 days
Construction Leads in Three Rivers
Access construction leads in Three Rivers by tracking newly submitted planning applications. See which homeowners and developers across the district are preparing extensions, loft conversions, and new builds, and get in touch before they begin shortlisting builders.
- New planning applications added frequently from Three Rivers District Council
- Connect with homeowners at the early planning stage
- No shared enquiries or competitive bidding
Data sourced from Three Rivers District Council planning records and refreshed regularly.
90
New Leads (30 Days)
£156,320
Average Project Value
32
High Value Projects
Over £100k
Extensions
Most Common Project
Construction Trends in Three Rivers
Three Rivers takes its name from the confluence of the Chess, Colne, and Gade rivers alongside the Grand Union Canal, and Rickmansworth's Aquadrome remains a focal point for the district's waterside character. Chorleywood, a few miles east, is known for its large area of common land — 76 hectares of grassland and woodland within a mile of the M25 — with a conservation area covering much of the village around it. Croxley Green keeps a similarly protected village character. Much of the district sits within London's Metropolitan Green Belt, which restricts new-build development outside existing settlement boundaries and keeps construction activity focused mainly on extending and refurbishing the district's substantial detached and semi-detached housing stock.
Project Type Breakdown
Here's a breakdown of the most common types of construction projects in Three Rivers over the past 30 days.
In Three Rivers, Extensions are the most common project type, appearing in 66 of the 90 leads tracked in the last 30 days, with Garden Rooms also showing consistent demand alongside Loft 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 Three Rivers
The architects and planning consultants submitting the most construction-related applications in Three Rivers, based on recent planning records.
- 1Architects Corporation Ltd
- 2YOOP Architects
- 3Noades Architects
- 4Dusek Design Associates Ltd
- 5Kristian Peel Architecture Ltd
- 6Beau Ideal Architects
- 7KG Plan & Design Ltd
- 8R.A.C. Draughting Services
- 9KRN Design Studio
- 10Architecture for the Senses
Project Value Insights
Understanding typical project values in Three Rivers 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 Chorleywood and Rickmansworth, where larger properties and more extensive upgrades are the norm.
Recent Planning Applications in Three Rivers
Extensions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Double Storey Extension | Croxley Green | £100k–£250k | Construction of part-single, part-two storey side extension with various alterations including dormers and solar panels. | Approved |
| Rear Extension | 35 Crofters Road Northwood HA6 3EB | £100k–£250k | Construction of first floor rear extension, loft extension with dormer, and various external alterations. | Refused |
| Wrap-Around Extension | Three Rivers | £100k–£250k | Conversion of garage to habitable space and construction of side and rear extensions, porch, and detached garage. | Approved |
| Single Storey Rear Extension | Chess Vale House 10 Harewood Rickmansworth Hertfordshire WD3 4EZ | £50k–£100k | Construction of a single storey rear extension and alterations to fenestration. | Approved |
| Wrap-Around Extension | Picketty House 22 Wyatts Road Chorleywood Rickmansworth Hertfordshire WD3 5TE | £100k–£250k | Demolition of garage and construction of a two storey side and rear extension. | Approved |
Double Storey Extension
Croxley Green
Construction of part-single, part-two storey side extension with various alterations including dormers and solar panels.
Rear Extension
35 Crofters Road Northwood HA6 3EB
Construction of first floor rear extension, loft extension with dormer, and various external alterations.
Wrap-Around Extension
Three Rivers
Conversion of garage to habitable space and construction of side and rear extensions, porch, and detached garage.
Single Storey Rear Extension
Chess Vale House 10 Harewood Rickmansworth Hertfordshire WD3 4EZ
Construction of a single storey rear extension and alterations to fenestration.
Wrap-Around Extension
Picketty House 22 Wyatts Road Chorleywood Rickmansworth Hertfordshire WD3 5TE
Demolition of garage and construction of a two storey side and rear extension.
Loft Conversions
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Loft Conversion | Three Rivers | £250k–£1m | Construction of part-single, part-two storey side extension and loft conversion with various alterations. | Approved |
| Loft Conversion | 37 Russell Road Moor Park Northwood Hertfordshire HA6 2LP | £250k–£1m | Construction of first-floor side extension, part two storey and part single storey rear extension, and various alterations including a swimming pool. | Approved |
| Loft Conversion | 30 Gable Close Abbots Langley Hertfordshire WD5 0LD | £50k–£100k | Certificate of lawfulness for a loft conversion with rear dormer and front rooflights. | Approved |
| Loft Conversion | 22 Batchworth Lane Northwood HA6 3DR | £250k–£1m | Substantial demolition and redevelopment including two-storey and single-storey front, side and rear extensions, new roof form with side/rear dormers and front rooflight, and alterations to fenestration and materials. | Approved |
| Loft Conversion | 20 Batchworth Lane Northwood HA6 3DR | £250k–£1m | Substantial demolition and rebuild with two-storey and single-storey front, side and rear extensions, new roof form with dormers and rooflights, front bay and internal alterations. | Approved |
Loft Conversion
Three Rivers
Construction of part-single, part-two storey side extension and loft conversion with various alterations.
Loft Conversion
37 Russell Road Moor Park Northwood Hertfordshire HA6 2LP
Construction of first-floor side extension, part two storey and part single storey rear extension, and various alterations including a swimming pool.
Loft Conversion
30 Gable Close Abbots Langley Hertfordshire WD5 0LD
Certificate of lawfulness for a loft conversion with rear dormer and front rooflights.
Loft Conversion
22 Batchworth Lane Northwood HA6 3DR
Substantial demolition and redevelopment including two-storey and single-storey front, side and rear extensions, new roof form with side/rear dormers and front rooflight, and alterations to fenestration and materials.
Loft Conversion
20 Batchworth Lane Northwood HA6 3DR
Substantial demolition and rebuild with two-storey and single-storey front, side and rear extensions, new roof form with dormers and rooflights, front bay and internal alterations.
Other Projects
| Project Type | Area | Est. Value | Description | Status |
|---|---|---|---|---|
| Heritage | Three Rivers | £100k–£250k | Internal structural works to floors, walls, ceilings, and roof of a listed building. | Approved |
| New Build | 5 Sandy Lodge Lane Moor Park Northwood Hertfordshire HA6 2JA | £250k–£1m | Demolition of existing dwelling and erection of two storey detached dwelling. | Refused |
| Garden Room | Three Rivers | £25k–£50k | Certificate of lawfulness for proposed outbuilding construction. | Approved |
| Garden Room | Rickmansworth Methodist Church Berry Lane Mill End Rickmansworth Hertfordshire WD3 7HJ | £25k–£50k | Construction of a detached modular outbuilding for storage. | Approved |
| Garden Room | 36 Blackford Road South Oxhey Watford Hertfordshire WD19 6YN | £50k–£100k | Retrospective application for a replacement detached outbuilding as an annexe. | Approved |
Heritage
Three Rivers
Internal structural works to floors, walls, ceilings, and roof of a listed building.
New Build
5 Sandy Lodge Lane Moor Park Northwood Hertfordshire HA6 2JA
Demolition of existing dwelling and erection of two storey detached dwelling.
Garden Room
Three Rivers
Certificate of lawfulness for proposed outbuilding construction.
Garden Room
Rickmansworth Methodist Church Berry Lane Mill End Rickmansworth Hertfordshire WD3 7HJ
Construction of a detached modular outbuilding for storage.
Garden Room
36 Blackford Road South Oxhey Watford Hertfordshire WD19 6YN
Retrospective application for a replacement detached outbuilding as an annexe.
Data sourced from Three Rivers District Council planning records and refreshed regularly.
Featured Projects
A snapshot of recent construction opportunities across Three Rivers.
Construction of part-single, part-two storey side extension, single storey rear extension; loft conversion including hip to gable roof extension with rear dormer and front rooflights, erection of front porch, replacement of garage door and roof and installation of solar, alterations to fenestration and materials, installation of airconditioning unit
£250k–£1mThree Rivers
Construction of part-single, part-two storey side extension and loft conversion with various alterations.
Construction of part-single, part-two storey side extension, alterations to roof including side and rear dormers, side and rear solar panels; rooflights, alterations to fenestration and new flue
£100k–£250kCroxley Green
Construction of part-single, part-two storey side extension with various alterations including dormers and solar panels.
Listed Building Consent: Internal structural works to floors, walls and ceilings and roof, including temporary removal and replacement of roof tiles to facilitate structural alterations
£100k–£250kThree Rivers
Internal structural works to floors, walls, ceilings, and roof of a listed building.
Demolition of existing dwelling and erection of two storey detached dwelling with associated alterations to the driveway and amenity space.
£250k–£1m5 Sandy Lodge Lane Moor Park Northwood Hertfordshire HA6 2JA
Demolition of existing dwelling and erection of two storey detached dwelling.
Examples of projects at an early stage before wider competition builds.
See All 90 Construction Leads in Three Rivers
Unlock full details and connect with homeowners while projects are still taking shape.
Get Access NowPlanning Application Status in Three Rivers
48%
Approved
49%
Pending
3%
Refused
In Three Rivers, 48% of planning applications are approved, 49% are still pending, and 3% are refused. Pending applications can give builders an opportunity to make contact while projects are still at an early stage.
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 Three Rivers
Among applications tracked by BuildAlert in Three Rivers, 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 Three Rivers
In Three Rivers, the vast majority (88%) 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 Three Rivers
Three Rivers' strong Metropolitan line commuter links into London support one of Hertfordshire's more affluent property markets, and the Green Belt restrictions covering much of the district reinforce a pattern of extending rather than moving among homeowners in Rickmansworth, Chorleywood, and Croxley Green. Chorleywood's conservation area and proximity to its protected common support particularly careful, higher-spec renovation work, while Rickmansworth's waterside setting near the Aquadrome adds a further draw for larger extension and refurbishment projects.
How to Win Jobs in Three Rivers
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 Three Rivers.
Track Planning Applications
We monitor Three Rivers District Council and surrounding authorities daily for new residential projects.
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Contact Homeowners
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Nearby Areas
Builders based in Three Rivers often take on work in nearby Hertfordshire areas such as Watford and Dacorum, helping maintain a consistent flow of projects.
Frequently Asked Questions
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