Greater London · London and the South East
Roof Leak Investigation in Northwick Park
Get a clear view of the leaking roof at a property in Northwick Park from an independent roof surveyor. Visits run on weekdays and weekends, in the daytime.
- Water dripping from rafters or underlay
- Damp patches next to the stack
- Leaks below a flat extension roof
About our roof leak investigation in Northwick Park
Leaks tend to begin where one part of a roof meets another. Flashings at chimneys and walls, valleys, gutters, parapets and flat roof upstands and outlets are the usual suspects. Each of these is checked in turn and we follow where the evidence leads. Every chimney, dormer and roof light adds more joints to check. Each one is checked from wherever it’s safe to see it. If you’ve noticed damp ceilings under a flat roof and damp patches next to the stack, we can find out what’s behind it, on chimney stacks, lead flashings and valleys and parapet gutters alike.
London’s Victorian and Edwardian roofs have frequently been repaired many times. Insurers normally exclude wear and tear, so it helps to know whether damage is old or new. A careful look in Northwick Park tells the two apart where the evidence allows. Photographs and a written account give you something specific to show an insurer, a landlord or a roofer.
You can share the report with anyone who needs it: a seller or estate agent, an insurer, a roofer, a builder or a managing agent, whichever applies.
- Where
- Northwick Park (HA1, HA3, HA0)
- Region
- Greater London
- Cost
- From £150 inc. VAT
- Report
- Written, with photos, emailed to you
- Survey days
- Weekdays, Saturdays and Sundays
- Insured
- PI and public liability insurance
- Call
- 07833 053749
- Updated
- 27 October 2026
Leaks and storm damage in Northwick Park
The wider area around Northwick Park has a long history of building, with Headstone Manor about 1.9 miles north-west. If yours is one of the older homes, expect a mix of original materials and later repairs on the roof, and the council can say whether a home is in a conservation area. Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, frequently with hipped roofs of clay or concrete tiles. If your home in Northwick Park is one of them, bay roofs, hips and later dormers each have their own details. The covering and its details give the first clues when tracing where water is coming from.
If you live near a park like Preston Park, or anywhere with mature trees, autumn leaves can block gutters and valleys. If you run a business near St. Anns, a leak can close part of a shop or office, so finding the cause quickly matters. Anyone responsible for a site like Harrow High School will know that water through a big roof can travel a long way before it drips, so the search covers more than the obvious spot.
Northwick Park is about 1 mile south-west of Kenton, in Greater London. Wherever you are in Northwick Park, we can carry out roof leak investigations at your property. Our area takes in places right across Greater London. London is in our area too.
We survey roofs across the HA1, HA3 and HA0 postcode area for roof leak investigations. That includes homes and businesses on Lyon Road, Manor Road and Gayton Road and the roads around them. With the A404 close by, Northwick Park is easy for us to reach for roof leak investigations. Neighbouring places we cover for roof leak investigations include Greenhill (1 mile north-west), Harrow on the Hill (1 mile south-west), South Kenton (1 mile east), Kenton (1 mile north-east) and Harrow (1 mile west). Larger places within reach include London (11 miles south-east), City of Westminster (9 miles south-east), Marylebone (9 miles south-east), Kensington (7 miles south-east), St Pancras (10 miles east) and Shoreditch (11 miles east).
What’s near Northwick Park
We work in homes and buildings around St Anselm's Catholic Primary School, Orley Farm School and Preston Park, among other places. The closest station to Northwick Park is Kenton station, roughly 0.6 miles north-east of the centre. A little further out are Northwick Park Hospital (within half a mile north-east) and Kodak Museum (1.5 miles north-west). Not far away are Masons Field and Northala Fields.
How the survey works
Once we have finished looking, we write up our findings as a report with photos. On timing, most surveys take about one to two hours for most houses, and more on a big or complicated roof. In Northwick Park, 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. A back bedroom window can be the best vantage point for a rear addition, so we may ask to use one.
- You get in touch with details of the leak and any photos.
- Inside, we check the damp area and the roof space above it.
- Likely entry points outside are looked at, from flashings and valleys to gutters and outlets.
- Moisture readings and thermal imaging are used where they help.
- We email a report with photographs, the likely entry point and recommendations.
Preparing for the visit
- Clear the way to the loft hatch
- Agree roof access with the managing agent if it is shared
- Make sure we can get to the back of the property
Arrange a survey
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 email us when you are ready.
Related advice
What a survey costs
Prices always include VAT. The things that change the price are:
- How complicated the roof is, with its valleys, chimneys and parapets
- How many separate roofs there are, such as extensions, dormers and garages
- If the survey needs thermal imaging or a drone
- Whether you choose the Basic, Standard or Premium Survey
There are three survey packages: Basic from £150, Standard from £250 and Premium from £400, with VAT included. The price for your roof depends on its size, access and what you’d like to know.
What we need to know
Getting the details right at the start saves time. Please include:
- What’s prompted the survey
- The address and postcode of the property
- The style of property, from a terrace to a block
- Dates you’re working to, such as exchange
Booking is simple: just ring 07833 053749 or send us an email, let us know about the property and we’ll point you to the right survey. We confirm the price before anything is booked.
Should I look at the roof myself first?
After heavy rain, check ceilings and the tops of walls for new stains. Take a photo and write down when you saw it.
A DIY look is useful, but it is not a survey. From the ground, valleys, flashings and the backs of chimneys are often out of sight.
Practical tips
Getting the most from a roof leak investigation starts before we arrive and carries on afterwards. Some tips:
- Record whether it leaks in every downpour or only some
- Move stored items away from the hatch
- Keep a photo record of the damp patch
- Catch drips in a bucket and protect the floor
Standard includes a follow-up consultation to talk the findings through, and Premium includes an in-person consultation. You can ask us about anything that isn’t clear.
Keep gutters, valleys and outlets clear, particularly in autumn. Many leaks start with a blocked outlet. Leave the clearing to someone with the right equipment.
Common questions in Northwick Park
Does a conservation area affect roof work in Northwick Park?
Your council is the best source, with Historic England’s list for listed buildings. Both listing and conservation areas can limit changes of roofing material, and councils can also use Article 4 directions.
Do you carry out roof surveys in Northwick Park?
Yes, Northwick Park is one of the places we work. Every survey there gets the same written report with photographs, and visits run on weekdays and weekends.
How much is a survey?
Prices start from £150, including VAT. The final figure depends on the roof and the package you choose, and it’s agreed before booking.
Do you look in the loft space?
Where it’s relevant to the survey and there’s safe access, yes. Please clear anything stored under the hatch, and if the loft can’t be reached safely, the report says so.
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.
Which days do you carry out surveys?
Visits run seven days a week in the daytime. Let us know your preferred days when you book.
How long does the visit take?
Allow about 1–2 hours at a typical home; commercial roofs usually need 3–4 hours. We will confirm what to expect when we arrange the visit.
For landlords and managing agents
Freeholders and residents’ companies use a roof report to plan and budget, with the most urgent items set out first.
With a portfolio of properties, you can book surveys for several addresses. To discuss a number of properties, call 07833 053749 or use the contact form.
Towns and villages near Northwick Park
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When you need someone else
A survey is a proper look at the leaking roof, but it can’t do everything. The main limits are:
- Whether rotten timbers meet design loads
- Leaks that only appear in weather we can’t recreate
- Carrying out the fix
If you’re not sure which survey you need, ring 07833 053749 or drop us an email and we will give you a straight answer before booking. The full list of what we check.
Roofs we survey in Northwick Park
- Flat roof details
- Slate and tile slopes
- Chimney stacks
- The roof space
- Valleys and parapet gutters
- Lead flashings
- Rooflights and dormers