When You Need a Topographical Survey in Ealing
A topographical survey is typically required before planning or technical design when levels, drainage, access, trees, or tight boundaries matter. It is especially useful for:
- New builds and replacement dwellings: accurate site data for design
- Major extensions: levels affect drainage and access
- Sloping or irregular sites: critical for drainage design
- SuDS and flood-risk work: contours and levels for drainage modelling
- Sites with trees: BS5837 arboricultural surveys require accurate topographical data
- Party wall support: pre-works condition surveys for adjacent properties
- Tight boundaries: where underground services or boundary constraints could affect design
West Ealing is explicitly advertised by local survey providers, confirming Ealing is a normal service area rather than a specialist remote job.
Costs in Ealing/London (2025)
| Site Type | Typical Price (ex VAT) | | --- | --- | | Small residential plot | From £350–£600 | | Small-to-medium London plot | From £895 | | 0.25–0.5 acres | £795–£895 | | 0.5–1 acre | £995–£1,200 | | 1–3 acres | £1,500+ | | 3+ acres | POA |
For a typical house plot in Ealing, expect a simple topo survey at the cheaper end of the range. Larger gardens, terraced infill sites, busy urban plots, or surveys needing extra detail will push the fee higher. Prices vary by scope and complexity.
What the Survey Covers
A standard topographical survey records:
- Building footprints with threshold, eaves, and ridge levels
- Boundaries, fences, walls
- Roads, paths, driveways
- Trees (trunk diameter, canopy spread, height)
- Drainage covers and visible utilities
- Street furniture and access points
- Spot levels and contours (0.5m or 1m intervals)
More detailed instructions can include utility context, georeferenced service positions, photos, legends, and CAD layer information.
Standard Deliverables
The usual output is a CAD plan in AutoCAD DWG, often with a PDF copy. Some providers also offer Revit or 3D formats. If utility or GPR work is included, deliverables can expand to utility drawings, confidence levels, methodology notes, and supporting reports. All surveys are georeferenced to OS National Grid with OD heights.
Turnaround Time
| Phase | Duration | | --- | --- | | Booking lead-in | 1–2 weeks | | Fieldwork | 1 day for standard site | | Drawing delivery | 1–2 working days | | Total | 2–3 weeks from instruction |
Several London providers advertise fast turnaround and deadline-led scheduling. Provide a red-line boundary, approximate site size, and intended use (planning, extension design, drainage, party wall) for a quicker quote.
Ealing W5/W13 Coverage
We provide topographical surveys throughout the London Borough of Ealing — including W5 (Ealing, Ealing Broadway, Ealing Common, Hanger Lane), W13 (West Ealing, Northfields, Pitshanger), Acton, Hanwell, Northolt, Perivale, Southall, Greenford, and all surrounding W, NW, and UB postcode areas. West Ealing is explicitly covered by local survey providers.
Frequently Asked Questions
Q: When do I need a topographical survey in Ealing?
You need a topographical survey for most planning applications in Ealing, especially new builds, major extensions, replacement dwellings, and sites with trees or complex topography. Ealing planning department typically requires accurate site plans showing levels, boundaries, and tree positions.
Q: What contour interval do I need?
1m contours are standard for planning applications. Drainage and earthworks design typically require 0.5m contours. Confirm with your design team.
Q: What accuracy can I expect?
RICS standards require ±50mm accuracy for detail points. All surveys are georeferenced to OS National Grid with OD heights.
Q: How long does a topographical survey take in Ealing?
Booking lead-in is typically 1–2 weeks. Fieldwork is 1 day for standard sites. Drawing production takes 1–2 working days. Total: 2–3 weeks from instruction.
Q: What information do I need to get a quote?
Provide a red-line boundary (approximate site area), intended use (planning, extension design, drainage, party wall), required contour interval, and any special requirements (trees, utilities, listed buildings).