Greater London · London and the South East
Flat roof survey in Harlesden, Greater London
Get a clear view of the flat roof at a property in Harlesden from an independent roof surveyor. We visit on weekdays and at weekends.
- Cracked or split membrane
- Failed upstands where the roof meets a wall
- Leaks around rooflights
Local flat roofs in Harlesden
In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. Next to the main roofs there is normally a flat roof somewhere, whether on an extension, a garage or a commercial unit. Historic houses such as Pitzhanger Manor, about 3.1 miles south-west, show how far back building in the area around Harlesden goes. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and a listed home or one in a conservation area may need consent for changes of material.
Shop and office owners around London Designer Outlet may find that the flat roofs over shops and commercial units are worth checking before a leak, not after. If you look after a building like John Keble CofE Primary School, schools and public buildings frequently have big flat roofs, and their outlets and upstands need regular checks.
Harlesden is about 4 miles west of City of Westminster, in Greater London. Anywhere in Harlesden, we can carry out flat roof surveys at your property, on a weekday, Saturday or Sunday. Harlesden is one of the towns and villages in Greater London we cover for flat roof surveys. For surveys nearby, see our London page.
Flat roof surveys in NW10, W3 and NW26 work the same way as everywhere else we cover. We offer flat roof surveys to properties on Fry Road, Wood Road and Park Road. Other places close to Harlesden include College Park (1 mile south-east), Old Oak Common (1 mile south), Church End (1 mile north), Stonebridge (1 mile north-west) and Willesden Green (1 mile north-east). Further out, we also cover London (7 miles east), City of Westminster (4 miles east), Marylebone (5 miles east), Kensington (3 miles south-east), St Pancras (6 miles east) and Shoreditch (7 miles east).
What’s near Harlesden
Around Harlesden, our work takes us to homes and buildings near St Claudine's Catholic School for Girls, Royal Oak Inn and Roundwood Park. There is a railway station in Harlesden itself: Willesden Junction station. Other landmarks nearby include Central Middlesex Hospital (1 mile west) and Brent Museum and Archives (1.1 miles north-east). Green spaces nearby include Castlebar Hill and The Long Water.
Flat roof survey in Harlesden: what you get
Each flat roof is looked at from the safest viewpoints we have: from the roof itself where that’s safe, from windows and nearby vantage points, and from inside where there is access. We do not walk on fragile rooflights or fragile roof sheeting. If part of the roof can’t be seen or reached safely, the report says so, so you know exactly what was covered. If you are worried about signs of deflection in the roof deck and edge trims that have lifted or split, we can find out what’s behind it.
Offices, shops and blocks of flats across London frequently have large flat roofs with plant, rooflights and walkways. Every penetration and upstand is a place where a membrane can fail. In Harlesden, roof access is agreed with the building manager or owner beforehand. Plant bases, rooflights and cable entries are all places where water can get in.
With the Standard Survey, you also get moisture detection, a structural check and a follow-up consultation. The Premium Survey adds thermal imaging, drone inspection where applicable, structural analysis and an in-person consultation.
- Location
- Harlesden (NW10, W3, NW26)
- Wider area
- Greater London
- Price
- From £150 inc. VAT
- Reports
- Emailed report with photos and recommendations
- Appointments
- Monday to Sunday, daytime
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
How the survey works
We look at the roof from outside and, where it is relevant and there is safe access, from inside the loft space too. In the loft, the signs we look for are staining, damp, daylight and sagging, as far as the space allows. All in, the survey normally takes an hour or two for an extension, garage or dormer roof, and around 3–4 hours for a commercial flat roof. In Harlesden, visits are available on weekdays and at weekends. It helps if you can point us to a visitor permit or a nearby bay, and to clear a path to the loft hatch. Upstairs rooms at the back are useful too, as they often give the best view of a rear addition.
- You send us the address and, for commercial roofs, an idea of the roof’s size.
- We check the rooms or spaces under the roof for staining where there is access.
- The roof is inspected from every safe viewpoint, without walking on fragile surfaces.
- Each defect is photographed and its likely cause noted.
- You get a report setting out the condition and our recommendations, in order of urgency.
Getting ready for the survey
- Let us know about parking near the property
- Keep pets out of the way during the survey
- Make a note of anything you’d like us to look at
Booking a survey
Not sure which survey you need? It’s easiest to ring 07833 053749 or send us an email and describe the roof and why you want it surveyed. We will talk you through the options and what they cost.
Advice
Nearby places to Harlesden
What else we do in Harlesden
Why act early in Harlesden
Ponding seldom gets better on its own. Most often it means blocked outlets, poor falls or a deck that is dipping, and each wet season wears the covering further. Knowing the cause early gives you more choice over what to do. Many older London roofs have only old felt under the slates, or no underlay at all, so once the slates or flashings let water past, little stops it reaching ceilings. Left alone, that means wet timbers and plaster, which is a far bigger job than the roof fault itself.
Prices quoted always include VAT, and the report isn’t charged as an extra. Flat roof survey starts from £150, including VAT. Size, height and access decide where your roof falls.
Why us?
- An independent look at the roof
- Covered by professional indemnity and public liability insurance
- Satisfaction rate of 98%
- Thermal imaging and drone inspection where they help
How we price flat roof surveys
We confirm the price for the job before booking. This is what makes a difference:
- How tall the building is and how easy the roof is to see
- The package you choose: Basic, Standard or Premium
- If the survey needs thermal imaging or a drone
- The shape of the roof and its details
Thermal imaging and drone inspection (where it applies) come with the Premium Survey, from £400 including VAT. We can help you choose the package that fits what you want to find out.
Booking your survey
A little information up front helps. It is useful to include:
- Any stains, drips or damp patches you’ve seen indoors
- When you need the report by
- How the loft is reached, if there is one
- Where the property is, with the postcode
A quick phone call is usually the easiest start: call 07833 053749 or email us, and we’ll ask about the building and what you need. The price is agreed before a date is set.
What you can safely check yourself
Fresh stains on ceilings or walls after rain are worth noting. Photograph them and note the date, as it helps a surveyor trace the cause.
After strong wind, take a look from the pavement or garden: pieces of tile or slate on the ground, a gap in the ridge or a lifted flashing are all worth noting. Do not go up yourself.
Common questions in Harlesden
Is parking a problem for a survey in Harlesden?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Does a conservation area affect roof work in Harlesden?
We cannot confirm that for you, but Historic England’s list and your council can. Both listing and conservation areas can limit changes of roofing material.
Will this cover the whole house?
No. We look closely at the flat roof rather than the whole building. It works alongside a RICS home survey, not instead of one, and structural calculations need a structural engineer.
How long is the visit?
Time on site depends on the roof, but most surveys take about 1–2 hours on an ordinary house, though large, tall or awkward roofs take more time. The report is sent afterwards by email.
Can you survey at the weekend?
Surveys run seven days a week. To find a day that suits you, phone 07833 053749 or send us an email.
Can you survey a flat roof on an office or unit?
Yes. Offices, units, shops and blocks of flats are all part of our work. We quote bigger roofs on their size and how they’re reached, so call 07833 053749 or use the contact form with the address.
Does someone need to be in?
That depends on the survey. Inside the building and in the loft, we need someone to let us in.
Practical tips
Small things make a difference. Our tips:
- Have the roof looked at again after a severe storm
- Ask whoever fits equipment on the roof to make good the covering
- Note where water lies after a downpour
- File the paperwork for the roof and any repairs
You get the report by email and can pass it to a roofer, your solicitor, the seller or your managing agent. It’s written in plain English, with a photo of each defect, so others can follow it without going up to look.
Small defects are simpler to deal with while they’re still small. A flat roof that’s looked after between surveys typically lasts longer.
Signs you need a flat roof survey in Harlesden
The surface of a flat roof heats up and cools down far more than the rooms below. This constant movement works at laps, seams and board joints, which can open splits and cracks over the years. Older coverings that have lost their flexibility are the most likely to suffer.
Here are some of the things we see frequently:
- Splits, cracks and crazing
- Dips that suggest the deck is deflecting
- Outlets that hold water back
- Raised blisters across the surface
Parking in Harlesden, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day easier.
What to check before booking
- How soon the report will arrive
- What the report includes, and whether it has photographs
- Is there a chance to talk the report through?
- Do they have a CAA Flyer ID and Operator ID for drone work?