Greater London · London and the South East
College Park Roof Leak Investigation
An experienced roof surveyor for roof leak investigations in College Park. Over 5,000 surveys and 20+ years behind us.
- Wet patches high on an inside wall
- A leak that comes and goes with the weather
- Drips from nail tips in a cold loft
How a roof leak investigation works in College Park
Our roof leak investigations cover College Park and the wider South East. Surveys are carried out on weekdays and at weekends. We look inside and out, at flashings, valleys, chimneys, gutters and flat roof details. The findings come in a written report with photos. If it’s leaking right now, contain the water and keep it clear of electrics, then call 07833 053749 or send us an email to arrange a visit. If you are worried about water marks that spread in wet weather and water coming in around a roof light or dormer, a survey will tell you what’s going on, whatever the roof.
In a London flat, water can travel some way before it shows. That makes the source hard to pin down, and finding it matters for whoever has to deal with it. In College Park, we inspect what we can reach safely and are given access to. Let us know when the water shows, and in what kind of weather.
The written findings come by email, ready to forward to whoever needs them. Basic reports come within 48 hours, Standard within 24–48 hours and Premium on the day.
- Place
- College Park (NW10, W10, NW26)
- Wider area
- Greater London
- Price
- From £150 inc. VAT
- Report
- Written, with photos, emailed to you
- Appointments
- Monday to Sunday, daytime
- Insurance
- PI and public liability insurance
- Phone
- 07833 053749
- Page updated
- 27 October 2026
When to book a survey in College Park
Chimneys can let water in by several routes. Water can enter through crumbling mortar, cracked flaunching, worn flashings or uncapped pots. It can show up on the chimney breast, nearby ceilings or in the roof space.
These are some of the problems a survey can pick up:
- Staining around the chimney inside
- Wet patches on loft insulation
- Wet patches high on an inside wall
- Leaks at a dormer or roof window
If you look after a building such as Kenmont Primary School, water through a big roof can travel a long way before it drips, so the search covers more than the obvious spot.
Questions to ask before booking
- Whether you can ask questions once you have the report
- Are they insured for the work?
- How long the report takes to arrive
- Which limits apply to the survey
Honest limits
Before you book, it is worth knowing what a survey will not do:
- Leaks that only appear in weather we cannot recreate
- Structural calculations (that is a structural engineer’s job)
- The repair itself (the investigation finds and reports the cause)
If in doubt, call 07833 053749 or drop us an email and we’ll suggest the right survey. What our survey covers.
What this survey covers
- Chimney stacks
- Slate and tile slopes
- The roof space
- Valleys and parapet gutters
- Lead flashings
- Rooflights and dormers
- Flat roof details
Practical tips
Here are a few things we’d tell any owner:
- Clear the loft hatch so we can get in
- Have an electrician check any wet fittings
- Don’t climb onto the roof to look
- Note the weather when the leak shows
Where we find more than one possible route, we say which is most likely and why. We say which items need prompt attention, so you know what to deal with first.
Keep the loft space ventilated. Air movement keeps condensation down, and condensation is a common false alarm. Keep insulation clear of the eaves.
What a survey costs
What a survey costs depends on the time and equipment it needs. That comes down to:
- How big the roof is
- If the survey needs thermal imaging or a drone
- The number of roofs, including extensions and garages
- Basic, Standard or Premium
Price depends partly on the package: Basic from £150, Standard from £250 or Premium from £400, all including VAT. The roof’s size, height and access matter as well.
Helping us price your survey
There’s no need for technical words. It’s enough to tell us:
- Whether there’s a loft hatch, a shared roof or tricky access
- Pictures of the roof from a safe spot, if you have them
- The reason for the survey, like buying, a leak or storm damage
- The kind of building and roof involved
We survey roofs seven days a week. To arrange a day that suits you, ring 07833 053749 or drop us an email with the address and the days you’d prefer.
Wind, rain and roofs in College Park
Leighton House, about 2.6 miles south-east, is one of the historic houses in the wider area around College Park. Older homes in the wider area often have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and a listed home or one in a conservation area may need consent for changes of material. Welsh slate on Victorian and Edwardian terraces is a familiar sight across inner London. Behind many of their parapets sit butterfly roofs and valley gutters that cannot be seen from the pavement. Lead flashings, party-wall upstands and shared chimney stacks are typical of these houses, if yours is one of them. The covering and its details give the first clues when tracing where water is coming from.
Homes near green spaces like Little Wormwood Scrubs can get more leaves in their gutters in autumn, and an overflowing gutter soon means a wet wall. If your home is one of the older ones in the streets near Saint Mark's, water on an older roof tends to find its way in at the lead, the valleys or the chimney.
College Park is about 1 mile south-east of Harlesden, in Greater London. College Park gets the same service as everywhere else we work: a careful inspection, photos and a written report. We cover towns and villages across Greater London, from the larger towns to small villages. You can also see our page for London.
Postcode districts we cover here for roof leak investigations: NW10, W10 and NW26. Streets in the area include Tubbs Road, Waldo Road and Hythe Road, and we cover them all. We also cover Kensal Green (1 mile east), Old Oak Common (1 mile south-west), Harlesden (1 mile north-west), Willesden Green (1 mile north) and Kensal Rise (1 mile east). Larger places within reach include London (6 miles east), City of Westminster (4 miles east), Marylebone (4 miles east), Kensington (3 miles south-east), St Pancras (5 miles east) and Shoreditch (7 miles east).
Near you in College Park
In College Park, that means homes and buildings near Newman Catholic College, Brondesbury College and Little Wormwood Scrubs. College Park has its own railway station: Willesden Junction station. A little further out are Westfield London (1.7 miles south) and Brent Museum and Archives (1.1 miles north). Not far away are Westbere Copse and The Long Water.
What happens on the day
We photograph the roof as we go, so you can see in the report what we found and where. We take close-ups from wherever is safe, including by drone where it’s applicable and the weather allows. A typical visit takes between one and two hours for most homes, though a hard-to-trace leak can take longer. London terraces rarely offer a view of the whole roof from one spot, so a visit in College Park moves between viewpoints: the pavement, upstairs windows, the loft and any safe spot at the back. If other people live in the building, tell us who can let us into the shared parts.
- You get in touch with details of the leak and any photos.
- The visit starts indoors, at the stain and in the loft.
- We check the likely entry points outside, like flashings, valleys, chimneys and gutters.
- We use moisture detection, and thermal imaging where it is useful.
- You receive a written report with photos showing the likely source and what needs attention.
Before we arrive
- Make sure pets are kept safely away
- Leave a clear route to the loft
- Let us know about parking near the property
Getting a price
Buyers should book once an offer has been accepted, so you have the findings in time to act on them before you exchange. For any other survey, just ring 07833 053749 or drop us an email when you’re ready.
Related advice
FAQs for College Park
Is College Park in the area you cover?
Yes, College Park is within the area we cover. We survey roofs across London and the South East. Just phone 07833 053749 or use the contact form and tell us about the property, and we’ll talk through which survey suits.
Does a conservation area affect roof work in College Park?
We cannot confirm that for you, but Historic England’s list and your council can. A change of roofing material may need consent in either case.
Will you go up on the roof?
Not unless it is safe. Safe viewpoints, the loft space and a drone where applicable cover most of what’s needed.
Can you find a leak when it is not raining?
Frequently, yes. Stains, tide marks, damp timbers and moisture readings normally point the way. Intermittent leaks can be harder, so photos and notes from when it leaks help a lot.
How much does a roof leak investigation cost in College Park?
Prices start from £150, including VAT. We confirm the price for your roof before you book, and it depends on the roof’s size, access and the package you choose. For a price, call 07833 053749 or use the contact form.
Will you fly a drone over my roof?
Where it’s applicable and safe, yes. We fly a sub-250g drone and we are a CAA-registered drone operator (Flyer ID and Operator ID). Drone inspection is part of the Drone Roof Survey and the Premium Survey, where applicable.
Do you look in the loft space?
If the survey needs it and the loft space can be reached safely, yes. Please clear anything stored under the hatch.
Also near College Park
Also in College Park
Leave it or get it looked at?
Guesswork repairs are a common reason leaks keep coming back. Because water travels, the real entry point may be somewhere else. We find the probable source before anyone starts work. In College Park, as in much of London, water from a roof defect can reach a neighbour’s home as easily as yours: failed flashings and blocked valley gutters can send water into more than one home. Finding it early keeps the work smaller.
Bigger, taller and commercial roofs take more time to survey, so they’re priced to match. You’ll know the figure before booking.
What you get with us
- Photographs and a written report every time
- 98% customer satisfaction
- Insured for professional indemnity and public liability
- More than 20 years surveying roofs
Take a look at what a roof survey costs and our case studies.