Laser-accurate existing drawings of your Hounslow property — floor plans, elevations and sections measured on site and drawn to millimetre tolerance, so every design, planning application and lease that follows starts from a base that is actually right, delivered in days.
Hounslow Council granted 86% of the householder planning decisions it made in its latest published year — 1 point below the 87% England-wide householder average. Side-return and mansard schemes dominate in Chiswick, where officers weigh roof bulk against a strongly uniform terrace roofscape, which is where a policy-literate drawing pack earns its keep. Its dominant Georgian (1714–1837), Victorian (1837–1901), Edwardian (1901–1910), interwar (1918–1939) and postwar (1945–1970) housing stock sets the design brief on most streets.
The permitted-development ceilings are fixed: 40m³ of new roof volume for a terraced loft and 50m³ for a semi or detached house under Class B, plus a 3m single-storey rear extension on a terrace or 4m on a detached house under Class A. Hounslow carries at least one Article 4 direction, and conservation areas including Bedford Park, Old Chiswick and Strand-on-the-Green remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Hounslow is determined against an 8-week statutory target.
Chiswick (Victorian and Edwardian terraces wrapped around the Bedford Park garden suburb), Brentford (older riverside terraces alongside recent waterfront redevelopment), Isleworth (the Old Isleworth riverside conservation area and Georgian frontages), Osterley (interwar semis on the fringe of Osterley Park), Feltham (postwar and interwar suburban estates to the south-west) and Hounslow (the town centre with mixed terraces and converted flats) — these are the Hounslow pockets our drawings cover most. Heritage designations here include Bedford Park, Old Chiswick, Strand-on-the-Green, Wellesley Road and Old Isleworth. Hounslow Council weighs each proposal against Hounslow Local Plan and the Residential Extension Guidelines SPD, where the borough's western edge sits under Heathrow flight paths, so glazing, ventilation and noise mitigation surface on larger schemes. Converted terraces are common through central Chiswick and Brentford, and flats and maisonettes carry no householder permitted-development rights.. On roofs the borough is London butterfly and valley roofs on the Chiswick terraces and hipped roofs on the interwar semis, over Victorian and Edwardian terraces across Chiswick, interwar semi-detached houses around Osterley and Hounslow and converted period flats and maisonettes.
Every proposed drawing is really two drawings — the house as it is, and the house as it will be — and the second is only as good as the first. A measured survey captures the property as-built: room sizes, wall thicknesses, window and door positions, floor-to-floor heights, ceiling lines and the outside envelope, all cross-checked so the plans, elevations and sections agree. Hounslow's Victorian and Edwardian terraces across Chiswick, interwar semi-detached houses around Osterley and Hounslow and converted period flats and maisonettes are rarely square or standard — walls lean, floors step, bays and returns hide behind later work — so measuring by hand off an old estate-agent plan simply carries the errors forward.
We survey with a laser measure and, on larger or more complex Hounslow buildings, a scanner that captures a point cloud — millions of measured points the drawings are traced from — so nothing is estimated. The output is a clean set of scaled as-existing drawings, delivered in CAD, that an architect, engineer or lease-plan draughtsman can work straight into. Side-return and mansard schemes dominate in Chiswick, where officers weigh roof bulk against a strongly uniform terrace roofscape, and an accurate existing set is what lets the proposed scheme answer that without a mid-project surprise.
Period and listed stock — the kind found across Bedford Park, Old Chiswick, Strand-on-the-Green, Wellesley Road and Old Isleworth and Hounslow's other conservation areas — is exactly where survey accuracy matters most, because heritage detail, irregular geometry and past alterations all have to be recorded faithfully. Bedford Park — the pioneering garden suburb shared with Ealing — carries a long-standing Article 4 direction, and the Chiswick and Old Isleworth conservation areas remove permitted-development rights on many of their period streets. We capture the fabric as it really is so the record stands up to scrutiny.
A measured survey is worth its cost whenever an accurate existing record matters. For Hounslow properties that usually means one of these:
We measure the whole property on site — plans, elevations, sections, floor-to-floor heights and the external envelope — and deliver a clean, scaled as-existing CAD set that your architect, engineer or lease draughtsman can build straight onto, so no one is re-measuring halfway through the Hounslow project.
Below is Hounslow Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Hounslow grants a fair share of householder applications, with terrace roofscape in the Chiswick conservation areas the dominant constraint on loft and rear schemes. A measured survey never appears in these figures, but it sits behind the applications that do — an accurate existing set is the difference between a scheme that is decided on merit and one queried because the drawings do not add up.
Source: MHCLG planning application statistics (householder decisions, rolling year). Compare every borough on our London approval-rate league table.
Tell us about your project and get a fixed, no-obligation quote back within one working day. If you don't need planning permission at all, we'll tell you that too — for free.
The deliverable is a coordinated set: existing floor plans for every level, elevations of each face, and at least one section cut through the building to show floor-to-floor and ceiling heights — the dimension a plan alone can never carry. Everything is drawn to a stated scale and tolerance and issued as CAD, so it drops straight into the next stage. Across Chiswick, Brentford and Isleworth, the buildings that most reward this are the large and altered ones, where a wrong assumption about a wall or a level costs a redesign later.
The borough's western edge sits under Heathrow flight paths, so glazing, ventilation and noise mitigation surface on larger schemes. We cross-check every dimension on site so the plans, elevations and sections agree with each other and with the real Hounslow building — the discipline that stops a proposed extension being drawn against a wall that is not where the old plan said it was.
We survey houses, flats and mixed-use buildings across the borough. A few of the Hounslow neighbourhoods where measured surveys come up most often:
Measured surveys of Chiswick's Victorian and Edwardian terraces wrapped around the Bedford Park garden suburb — laser-measured, cross-checked and delivered as scaled as-existing CAD.
Measured surveys of Brentford's older riverside terraces alongside recent waterfront redevelopment — laser-measured, cross-checked and delivered as scaled as-existing CAD.
Measured surveys of Isleworth's the Old Isleworth riverside conservation area and Georgian frontages — laser-measured, cross-checked and delivered as scaled as-existing CAD.
Measured surveys of Osterley's interwar semis on the fringe of Osterley Park — laser-measured, cross-checked and delivered as scaled as-existing CAD.
Measured surveys of Feltham's postwar and interwar suburban estates to the south-west — laser-measured, cross-checked and delivered as scaled as-existing CAD.
Measured surveys of Hounslow's the town centre with mixed terraces and converted flats — laser-measured, cross-checked and delivered as scaled as-existing CAD.
A full survey records the property in three dimensions, not one. This is what each output gives and what it is used for.
| Output | What it records | Used for | Typical method |
|---|---|---|---|
| Existing floor plans | Room sizes, wall thicknesses, openings | Design, planning, lease plans | Laser measure |
| Elevations | Each external face, window positions, heights | Planning applications, heritage | Laser & photo |
| Sections | Floor-to-floor and ceiling heights | Loft, structural, headroom checks | Laser & scan |
| Point cloud | Millions of measured points | Complex or large buildings | 3D laser scanner |
On period and listed stock around Bedford Park and Old Chiswick, a point-cloud survey records irregular Hounslow fabric that hand measurement would miss.
A fixed process built around getting the existing record right first time — most as-existing sets are delivered within five days of the site visit.
Tell us the Hounslow property type and what the survey is for. We confirm what you need — plans only, or plans, elevations and sections — and whether a scan is worth it for the building's size or complexity.
A surveyor measures the whole property with a laser measure and, where useful, a 3D scanner — every room, the external envelope, floor-to-floor heights and the awkward corners an old plan glosses over.
We draw up the coordinated existing plans, elevations and sections to a stated scale and tolerance and issue them as CAD, ready for the next stage of your Hounslow project.
You get the full set in CAD and PDF, and we answer any query from the architect, engineer or Hounslow Council that follows — the survey is the base everything else is checked against.
No — a measured survey is simply an accurate record of the property as it stands, so it needs no permission from Hounslow Council and involves no building work. It is the step before any application: the as-existing drawings it produces become the base for the proposed scheme you later submit. Many Hounslow projects go wrong precisely because they skip it and design onto an inaccurate old floorplan instead.
They answer completely different questions. A valuation or condition survey tells you what a Hounslow property is worth or what state it is in; a measured building survey tells you precisely what shape and size it is — the dimensions an architect or engineer needs to draw from. If you are extending, converting or applying to Hounslow Council, it is the measured survey you need, not a valuation.
You can, and for a small square room it is fine — but Hounslow's victorian and edwardian terraces across chiswick are rarely square, and small errors compound across a whole building until the plans, elevations and sections no longer agree. A laser or scanned survey cross-checks every dimension so the set is internally consistent. The cost is modest against a redesign, or an application Hounslow Council queries because the drawings do not match the building.
A full measured survey includes all three. Floor plans alone cannot tell you floor-to-floor or ceiling heights, which is exactly what a loft conversion, a structural calculation or a headroom check in a Hounslow property depends on. We record elevations of each external face and cut at least one section through the building, so the existing set is complete and every later stage has the dimension it needs. Hounslow Council is the decision-maker.
Yes — an accurate measured survey is the ideal base for both. A Land Registry-compliant lease plan is drawn from the same existing measurements, and a party wall surveyor works from an accurate record of the Hounslow property and its boundaries. Commissioning one survey that serves the design, a lease plan and any party wall work avoids paying to measure the building more than once. Hounslow Council is the decision-maker.
We price each Hounslow survey on the size of the property and whether you need plans only or plans, elevations and sections, and send a fixed, no-obligation quote within one working day. Larger or listed buildings that warrant a 3D scan are quoted accordingly. The survey pays for itself by keeping every later drawing and Hounslow Council submission accurate. Call 020 7864 7245 to start.
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