Combined Measured Building and Topographical Survey in Ealing
The London Borough of Ealing spans a diverse range of property types — from Victorian and Edwardian terraces in Acton, Ealing, and Shepherd's Bush, to detached houses in Northolt and Perivale, to commercial buildings along the A40 corridor. Whatever your project, a combined measured building and topographical survey in Ealing gives you the complete picture: accurate building dimensions and site levels in a single site visit, delivered by one team, from one provider.
This guide covers what a combined survey includes, typical 2025 costs in Ealing, the deliverables you will receive, and how Ealing Council's planning requirements shape what you need to commission.
What Is a Combined Measured Building and Topographical Survey?
A combined survey brings together two essential survey types into a single commission:
| Survey Component | What It Captures | Why You Need It | | --- | --- | --- | | Measured Building Survey | Floor plans (all levels), external elevations, roof plan, cross-sections, floor-to-ceiling heights, window and door positions, structural elements, staircases | Accurate dimensions for your extension, loft conversion, or refurbishment design | | Topographical Survey | Site boundaries, ground levels and contours, trees and vegetation, drainage covers, visible utilities, roads and paths, fences and walls, spot heights, building footprints | Accurate site levels for drainage design, landscaping, and boundary verification |
When both are commissioned together, you save approximately 15% compared to two separate commissions — and the data is consistent, sharing a single coordinate system throughout.
Why Ealing Properties Often Need a Combined Survey
Common Ealing Property Types and Their Survey Needs
| Property Type | Location | Combined Survey Need | | --- | --- | --- | | Victorian terraces | Acton, Ealing, Shepherd's Bush | Irregular geometry requires precise measurement; sloped gardens need topographical data for drainage | | Edwardian semi-detached | Northfields, South Ealing, Hanwell | Combined survey covers the house and garden levels for rear extensions | | Inter-war semi-detached | Northolt, Greenford, Perivale | Bungalow-style properties with flat roofs and large rear gardens — topo data important | | Detached houses | Ealing Common, Montpelier, West Ealing | Large plots with complex topography — ground levels and drainage critical | | Commercial buildings | A40 corridor, Acton, Park Royal | Full measured survey plus site plan for planning and tenant fit-out | | Period conversions | throughout Ealing | Accurate floor plans for leasehold alterations and planning consent |
Ealing Planning Requirements and How a Combined Survey Meets Them
Ealing Council's planning department typically requires the following for house extension and conversion applications:
| What Ealing Council Requires | Survey Type That Provides It | | --- | --- | | Location plan (1:1250 scale) | Topographical — accurate boundary and site layout | | Site plan (1:200 scale) | Topographical — proposed works in context with the site and levels | | Floor plans of existing building | Measured building survey | | All external elevations | Measured building survey | | Section through proposed extension | Measured building survey | | Drainage strategy with levels | Topographical — spot heights and fall calculations | | Boundary and neighbour relationship | Topographical — confirmed boundary lines |
A combined survey provides all of these in a single package — saving time and ensuring the building and site data are seamlessly integrated.
What Does the Survey Cover?
Measured Building Survey Component
| Deliverable | Details | | --- | --- | | Floor plans | All levels — ground, first, second, and any upper floors. Includes room names, dimensions, architectural features, sanitary ware, and built-in fixtures. | | External elevations | All four facades — north, south, east, and west. Shows openings, materials, bay windows, decorative features, and height to eaves and ridge. | | Roof plan | Plan view of the roof showing pitch, shape, dormers, chimneys, roof lights, and valleys. | | Cross-sections | Two or three sections through the building at key points — showing floor-to-ceiling heights, ceiling voids, stair geometry, and structural zones. | | Site plan | Scaled location plan showing the building within its plot — with boundary dimensions, neighbouring buildings, and existing access. | | Window and door schedule | Dimensions and positions of all windows and doors — useful for ordering replacements or specifying new openings. | | Key features | Fireplace surrounds, cornices, stair geometry, ceiling heights, window cill levels, structural beams and columns. |
Topographical Survey Component
| Deliverable | Details | | --- | --- | | Site boundaries | Accurate boundary lines confirmed against Land Registry title | | Ground contours | Spot heights across the site at regular intervals — showing the slope and fall of the land | | Trees and vegetation | Location, species, trunk diameter, canopy spread, and height of all significant trees — critical for tree protection orders (TPOs) | | Drainage covers | Position and invert level of all surface water and foul water drains | | Visible utilities | Electricity boxes, gas meters, water stops, telecom cabinets, and other visible surface services | | Roads and paths | Vehicle access, pedestrian paths, and hardstanding areas within the site | | Fences and walls | All boundary treatments with heights and materials | | Building footprints | Accurate outlines of all buildings on the site with heights to eaves and ridge | | Services evidence | Location of utility meter boxes, manhole covers, and any visible service connections |
2025 Costs for a Combined Survey in Ealing
| Property Type | Combined Survey Cost (ex VAT) | | --- | --- | | Small residential (up to 2,000 sq ft / 2–3 bed) | £1,400–£2,200 | | 3-bedroom house | £1,450–£1,800+ VAT | | 4-bedroom Victorian or Edwardian house | £1,700–£2,200+ VAT | | 5+ bedroom detached house | £2,200–£3,500 | | Small commercial building | £2,500–£5,000 | | Medium commercial building | £5,000–£10,000+ |
Ealing-Specific Cost Factors
| Factor | Impact | | --- | --- | | London premium | +10–20% compared to outside London — ULEZ charges, congestion, and parking add to provider costs | | Property age and complexity | Victorian and Edwardian properties in Acton, Ealing, and Shepherd's Bush have irregular geometry that requires more measurement time | | Sloping sites | Gardens with significant fall (common in parts of Ealing) require more detailed topographical capture | | Furnished and occupied properties | Survey takes longer when rooms are fully furnished — additional time may be charged | | Conservation areas | Properties in Ealing, Bedford Park, or Addison conservation areas may require additional detail for planning | | Access and parking | Some areas of Ealing have limited parking — surveyors may pass on congestion costs |
Rule of thumb: Approximately £500+ VAT per day for survey work — one day on site plus two to four days of office processing and CAD production.
Technology Used in Modern Ealing Surveys
Professional survey companies in Ealing use the following technology:
| Technology | What It Does | Why It Matters | | --- | --- | --- | | 3D laser scanning (FARO, Leica RTC360) | Captures ~1 million points per second with millimetre accuracy | No guessing — every dimension comes from the scan data | | Total stations | Precision angle and distance measurement | Establishes control points and verifies accuracy | | GNSS (GPS) | Satellite positioning for site coordinates | Ground control tied to Ordnance Survey National Grid | | Digital HDR photography | Captures colour and texture of every surface | Elevations and elevations are accurate and photographic | | Point cloud processing | Registers multiple scan stations into a single dataset | Seamless 3D model of the whole building and site |
Deliverables You Will Receive
Standard Deliverables
| Format | Contents | | --- | --- | | 2D CAD drawings (DWG) | Floor plans, elevations, sections, roof plan, site plan, and topographical plan — all in AutoCAD DWG format | | 2D PDF drawings | Same drawings in PDF — easy to share with your architect, engineer, or planning consultant | | Topographical plan | Contours, spot heights, boundaries, trees, drainage, services — in DWG and PDF | | Measured building survey report | Written confirmation of methodology, accuracy, and any access limitations |
Optional Upgrades
| Upgrade | Additional Cost | When You Need It | | --- | --- | --- | | 3D BIM model (Revit/IFC) | +£550+ per model | When your architect requires a BIM model for design coordination | | Point cloud data (RCP/RCS) | +£200–£500 | When you want the raw scan data for future works or FM purposes | | 360° imagery / TruView | +£200–£500 | When you want a visual walkthrough for remote review | | NIA/GIA calculation | +£150–£300 | When you need Net or Gross Internal Area figures for valuation | | Reflected ceiling plan | +£200–£400 | When you are redesigning the electrical or HVAC layout |
Typical Turnaround Time in Ealing
| Stage | Timeline | | --- | --- | | Quote and proposal | Within 20 minutes to 24 hours | | Site visit scheduling | Within a few days — often 48–72 hours for Ealing properties | | Site survey | 1 day (2–4 hours for a typical house; longer for larger or complex properties) | | Office processing and CAD production | 2–4 days depending on property size and complexity | | Final delivery | 3–7 working days standard; 5–7 days typical for Ealing | | Express option | 24–72 hours — add 40–50% to the price |
For most Ealing residential properties, you can expect a first draft within five working days of the site visit.
Ealing-Specific Considerations
Conservation Areas
Ealing has several designated conservation areas — including Ealing, Bedford Park, Addison, Hammersmith Grove, and others. If your property is in a conservation area, Ealing Council may require additional detail in the measured building survey, including:
| Additional Detail | Why It Is Required | | --- | --- | | Detailed elevation drawings at 1:50 | Planning committee reviews architectural detail in conservation areas | | Window and door schedule with ironmongery | Replacement windows and doors must match original detailing | | Moulding and cornice details | Original architectural features must be recorded and replicated | | Period feature photographs | Supporting evidence for planning applications involving historic fabric |
Green Belt and Open Space Considerations
Properties in Northolt, Greenford, and Perivale may be affected by Green Belt designations and Open Space designations. A topographical survey is particularly important for these properties — boundary accuracy and tree location are critical for planning applications in Green Belt areas.
A40 Corridor Development
The A40 corridor through Ealing, Acton, and Park Royal is undergoing significant redevelopment. If your property is in this area, be aware that planning applications may be subject to major development infrastructure requirements — including Contributions and Section 106 agreements. The topographical survey will be scrutinised for boundary accuracy and drainage strategy in these cases.
Frequently Asked Questions
Q: How long does a combined survey take on site in Ealing?
For a typical Ealing house (2–4 bedrooms), the site visit takes 2–4 hours. A larger property, a Victorian house with complex geometry, or a property with a large sloped garden takes longer. The topographical survey of the site adds an additional 1–2 hours. Most combined surveys for Ealing residential properties are completed within a single day.
Q: Do I need to be present for the whole survey?
No — you do not need to be present for the entire survey. A surveyor can work around a property that is partially occupied, measuring rooms and the exterior while you go about your day. Let the survey company know in advance if there are locked rooms or areas you would like them to avoid.
Q: What happens if parts of my property are inaccessible?
The surveyor will measure everything that is accessible. If areas are locked, the surveyor will note this in the report. For topographical surveys, the site is usually fully accessible. Let the survey company know in advance of any access restrictions so they can plan the visit accordingly.
Q: My property is in a conservation area in Ealing — do I need more detail?
Possibly yes. Ealing Council's planning department may require more detailed drawings and documentation for properties in conservation areas. Discuss this with your architect and planning consultant — and mention it to the survey company when commissioning so they can adjust the scope accordingly.
Q: I already have drawings from when I bought the property — do I still need a survey?
If your property was built before the 1990s, the drawings from your purchase are likely to be inaccurate. Pre-digital drawings can be 20–50mm out of true in any dimension — and they may not reflect any works carried out since. If you are planning an extension, loft conversion, or refurbishment, accurate current dimensions are essential.
Q: Can I get just the topographical survey without the measured building survey?
Yes — most survey companies offer topographical surveys as a standalone service. However, if you need planning permission or are commissioning design works, you will almost certainly also need the measured building survey. Commissioning both at the same time is approximately 15% cheaper than two separate commissions.
Q: How often should the survey data be updated?
Measured building and topographical survey data remains valid indefinitely for design purposes, provided the building and site have not changed. If significant works have been carried out — an extension, loft conversion, basement, or new hard landscaping — a new survey is required for the affected areas.
Q: Can the survey data be used for a BIM model?
Yes — the point cloud from the laser scanning can be used to create a 3D BIM model in Revit (LOD 200–400). This is an optional add-on to the measured building survey. If your architect requires a BIM model for design coordination, the survey company can produce this as an additional deliverable.