Greater London · London and the South East
Electronic Leak Detection in City of Westminster
A careful look at the flat roof membrane at your property in City of Westminster, and put it all in a written report with photos.
- Patched roofs that still leak
- Stains far from any visible defect
- Water coming in under a flat roof
Questions from City of Westminster
Can you look at the flat roof of a hotel or office near City of Westminster?
Yes. As well as homes, we check flat roofs on offices, hotels, blocks of flats and commercial units. Larger commercial roofs are quoted for the building, and roof access is agreed with you before the visit.
Will parking be an issue for a roof survey in City of Westminster?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Will you photograph what you find?
Yes, plenty. Pictures sit next to the findings they show, so you can see what we mean.
What happens next?
You’ll receive the report by email, and what you do next is up to you: raise it with a seller, send it to an insurer, brief a roofer or share it with a managing agent.
Is this a RICS survey?
No. We’re experienced roof surveyors, and our survey covers the roof rather than the whole building. If you need a full building survey, you will need a RICS survey as well.
Does someone need to be in?
That depends on the survey. For inside areas and the roof space, someone has to give us access, while outside access can be discussed as you book.
Will you go up on the roof?
Not always. Some roofs are too steep or fragile to walk on safely. Safe viewpoints, the loft and a drone where it applies let us see the rest.
Electronic leak detection in City of Westminster: what you get
You get a report showing the location of each breach, with photographs. It tells your roofer exactly where to repair instead of hunting for the leak. We don’t estimate repair costs, so your roofer prices the work. Testing again after repairs can confirm the breaches have been dealt with if the build-up allows. Results come in a written report with photos. Common reasons to book are leaks through a covered membrane and new roofs to check before paving or planting, across commercial flat roofs, roof terraces and balconies and green roofs.
On a London roof terrace or a flat roof over a back addition, water often runs under the covering before it shows. Upstands against parapets, outlets and the edge where flat meets pitched are common entry points. In a converted house in City of Westminster, the roof above may belong to the building rather than one flat.
Every survey ends with a written report, with photos, sent by email. It explains the condition of the flat roof membrane, the defects we found and what we recommend.
- Place
- City of Westminster (W2, NW8, W9, SW1V)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- Appointments
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
Places near City of Westminster
More services for City of Westminster
Before and after the survey
A survey works best with a little help from you, before and after. Tips:
- Tell us about the membrane and build-up if you know it
- Don’t let outlets block
- Ask contractors to protect the membrane
- Keep foot traffic on flat roofs to a minimum
File the report with your roof paperwork. It shows the condition of the membrane on that date.
Check contractors protect the waterproofing when fitting equipment. Check the roof after they’ve finished.
What affects the cost of electronic leak detection
What a survey costs depends on the time and equipment it needs. The main factors are:
- Roof area
- Features like valleys, chimneys, dormers and parapets
- Extensions, dormers and garages with roofs of their own
- If the survey needs thermal imaging or a drone
To find out what your survey will cost, call 07833 053749 or drop us an email and tell us about the roof. The price is agreed before a date is set.
Getting in touch
Here’s what helps us most when you get in touch:
- Any marks or damp showing indoors
- The kind of building and roof involved
- The address and postcode of the property
- Whether there’s a loft hatch, a shared roof or tricky access
Every survey is priced before it’s booked, so you know the cost up front. We quote electronic leak detection for each roof, as the method and time depend on the roof. To book, ring 07833 053749 or drop us an email.
Rented homes, blocks and businesses
Businesses and commercial landlords can book us too, including offices, shops and units. Larger roofs take longer, so they’re priced to suit.
Letting agents often book on a landlord’s behalf, with the report sent to whoever needs it. Access is agreed with the tenant ahead of time.
Electronic leak detection around City of Westminster
Historic houses like Handel Hendrix House, about 0.3 miles east, show how far back building in the area around City of Westminster goes. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead, and a listed home or one in a conservation area may need consent for changes of material. Close to the centre of London, a great many houses are Victorian or Edwardian terraces, many of them roofed in Welsh slate. Behind many of their parapets sit butterfly roofs and valley gutters that cannot be seen from the pavement. Shared chimney stacks, party-wall upstands and lead work come with this kind of house. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises.
If you live in an older home near St Mark's, the joins between later flat roofs and the old walls are where problems usually start. A roof leak in a hotel or guest house around City of Westminster means lost rooms as well as repairs, so it pays to find faults before guests do. Shop and office owners around Kingly Court may find that the flat roofs over shops and commercial units are worth checking before a leak, not after.
City of Westminster is about 3 miles west of London, in Greater London. We survey roofs in City of Westminster across London and South East England. City of Westminster is one of the towns and villages in Greater London we cover for electronic leak detection.
Electronic leak detection in W2, NW8, W9 and SW1V work the same way as everywhere else we cover. Whether your property is on Portman Square, Grosvenor Square and Cavendish Square or anywhere close by, we can survey it. City of Westminster sits on or near the A4 and A5. Neighbouring places we cover for electronic leak detection include Marylebone (1 mile north-east), Mayfair (1 mile south-east), Tyburn (1 mile west), Burlington Estate (1 mile south-east) and Connaught Village (1 mile west). Further out, we also cover London (3 miles south-east), Shoreditch (3 miles east), Walthamstow (7 miles north-east), Hoxton (3 miles north-east), Whitechapel (4 miles east) and Hampstead (3 miles north-west). Being one of Greater London’s larger places, City of Westminster has homes, rented property and businesses of every kind.
Landmarks near City of Westminster
Around City of Westminster, our work takes us to homes and buildings near LITE Regal International School, Royal Society of Medicine Library and Devonshire Arms, among other places. Also close by are The St Marylebone CofE School (0.5 miles north) and Hyde Park (0.6 miles south-west). City of Westminster has its own railway station: Bond Street station. Other landmarks nearby include Dunhill Museum & Archive (under half a mile north) and Kingly Court (0.6 miles east). For a walk, there’s Serpentine and Primrose Hill.
Roof by roof
Inverted and paved roofs
Paving and terraces cover the membrane. Whether it can be tested depends on the build-up.
Single-ply membranes
Many offices and units have single-ply roofs. Seams and penetrations are typical breach points.
Leave it or get it looked at?
Some flat roof leaks come from walls or details. ELD helps rule the membrane in or out so attention can go to the right place. Work on a London roof is rarely simple to arrange, with parking, neighbours and access all to think about. Knowing what’s needed early gives you time to plan it calmly.
The cost of a survey depends on the roof: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Why book with us
- An independent look at the roof
- 98% customer satisfaction
- More than 5,000 surveys completed
- CAA-registered drone operator (Flyer ID and Operator ID)
Take a look at how roof surveys are priced and our case studies.
What we do, step by step
Where it’s relevant and can be reached safely, the loft space is checked as well as the outside. In the loft, the signs we look for are staining, damp, daylight and sagging. All in, the survey normally takes a time that depends on the roof’s area and construction, which we set out in the quote. Surveys in City of Westminster can be booked for any day of the week. London parking is frequently by permit or pay-and-display, so it’s useful to know what’s near you. A back bedroom window can be the best vantage point for a rear addition, so we may ask to use one.
- You tell us about the roof and where water is showing.
- The roof is assessed for suitability first.
- We choose a low-voltage or high-voltage method to match the roof.
- We test the roof and locate any breaches.
- You get a report with photos of each breach.
Before the survey
- Keep pets in another room
- Mention any parking restrictions on your street
- Have any paperwork from past roof work to hand
Booking a survey
You can call us seven days a week, including Saturdays and Sundays. To book or ask a question, ring 07833 053749 or email us.