Greater London · London and the South East
Roof leak investigation in Mill Hill, Greater London
Roof leak investigations around Mill Hill, with findings in writing and pictures to back them up. Book a weekday or weekend visit.
- Damp ceilings under a flat roof
- Water dripping from rafters or underlay
- Staining where a gutter or parapet meets the wall
Roof leak investigation in Mill Hill: what you get
On older houses, leaks often start at lead work and hidden gutters. Worn lead, tired valley linings and blocked parapet outlets are frequent causes. If your home has a butterfly roof, the central valley gutter is a common culprit. We check parapets, valleys and flashings from each safe vantage point. The findings are recorded with photos. If you are worried about damp underlay across a wide area and leaks below a flat extension roof, we can find out what’s behind it, whatever the roof.
Water getting into a London home often comes from a detail you cannot see from the street: the valley gutter in a butterfly roof, a parapet gutter, a chimney flashing or the flat roof over a rear extension. For a leak or storm damage in Mill Hill, those hidden details are where the inspection begins. A hidden gutter that overflows can send water a long way before it shows.
Most points in the report come with a picture, because a photo of a cracked flashing says more than a paragraph. Anything out of sight on the day is listed as such.
- Place
- Mill Hill (NW7, N20)
- Wider area
- Greater London
- Prices
- From £150 inc. VAT
- Report
- Written, with photos, emailed to you
- Survey days
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
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, as far as the space allows. All in, the survey normally takes about 1–2 hours at most homes; commercial roofs usually need 3–4 hours. For a visit in Mill Hill, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor the property is on and how to get into the loft. We then look at whatever is safely visible from ground level, windows, the loft and, where it’s safe, the roof itself.
- You pick a Basic, Standard or Premium Survey.
- We agree a date, including weekends.
- The investigation works from the stain back to the roof.
- Moisture detection and thermal imaging are used where your package includes them and they help.
- You get photos, the likely cause and clear recommendations.
Before we arrive
- Agree roof access with the managing agent if it’s shared
- Clear the way to the loft hatch
- If you are buying, let the agent know when we’re coming
Arrange a survey
To arrange a survey, call 07833 053749 or use the contact form and let us know the address and what’s prompted the survey. You’ll know the price before anything is booked.
Related advice
Nearby places to Mill Hill
More services for Mill Hill
FAQs for Mill Hill
Is my home in Mill Hill listed or in a conservation area?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it is in a conservation area. Listed building consent is needed for changes that affect a listed building’s special interest, and conservation areas can limit changes of roofing material.
Can parking be tricky for a visit in Mill Hill?
It can be, so it’s useful to tell us about permits, visitor bays or off-street space as you book. That way the visit can be planned around it.
Is Mill Hill in your area?
Yes. Our area covers London and South East England, and that includes Mill Hill.
What should I do before you arrive?
Note when the leak appears and what the weather was doing. Clear access to the loft. Keep away from any light or socket that water is reaching.
What does a roof survey cost?
Prices start from £150, including VAT. Our three packages are Basic from £150, Standard from £250 and Premium from £400, with VAT included.
What do I do with the report?
The report arrives by email. The Standard Survey includes a follow-up consultation, and the Premium Survey an in-person consultation.
Do you carry professional indemnity insurance?
Our surveys are covered by professional indemnity and public liability insurance. Ask if you need details for a managing agent or building owner.
What we are asked to look at in Mill Hill
Flat roofs fail with age and wear. Felt often lasts around 15 to 20 years, and splits, blisters and lifting laps let water in. Upstands and outlets are common weak points.
Typical things we are asked to look at include:
- Condensation that looks like a leak
- Wet patches on loft insulation
- Leaks that appear only in driving rain
- Leaks at a dormer or roof window
If you run a business near Broadwalk Centre, water through a ceiling can damage stock and close a sales floor, so the source needs finding fast.
Before you book any roof surveyor
- Whether you get a written report with photos
- What follow-up you get after the report
- What they will not be able to tell you
- How long they’ve been surveying roofs
Why act early in Mill Hill
Wet insulation does not insulate well. Insulation can soak up water quietly before anything shows below. Catching it early limits what has to be replaced. In Mill Hill, as across London, an overflowing gutter soaks the wall below, which can lead to damp inside. A blocked outlet ignored for a winter or two can mean damp walls inside.
Prices start from £150, including VAT. Packages run from Basic at £150 through Standard at £250 to Premium at £400, including VAT.
Why book us in Mill Hill
- Photographs and a written report every time
- Package prices that include VAT
- Over 20 years’ experience
- We hold a CAA Flyer ID and Operator ID
Tips from our surveys
These tips come from what we see on roofs every week:
- Make sure the loft is accessible
- Put a bucket under the drip and move valuables
- Photograph the stain each time it appears
- Mention earlier attempts to fix the leak
With the Standard Survey you get a follow-up consultation, while Premium includes one in person. It is a chance to ask about anything in the report.
After a storm, check the roof from the garden and the street. Slipped slates, lifted ridge tiles and debris on the ground are signs to act on. Prompt repairs stop gaps turning into leaks.
Roof leak investigations in Mill Hill: local notes
Outer London has a good many Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, often with hipped roofs in clay or concrete tiles. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. Each of these roof types has its own typical places for water to get in. Heath Hall, about 4 miles south-east, is one of the historic houses in the wider area around Mill Hill. Older homes in the wider area frequently have features worth a closer look, like 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.
If you live near a park such as Bittacy Hill Park, or anywhere with mature trees, autumn leaves can block gutters and valleys, and blocked gutters overflow and soak walls. For landlords with property near Mill Hill Broadway station, finding the cause of a leak fast keeps a tenant’s home dry and the work focused.
Mill Hill is about 1 mile north-east of Burnt Oak, in Greater London. We visit Mill Hill as part of our work across Greater London, for houses, flats and commercial buildings. Our area takes in places right across Greater London, large and small. Our London page covers surveys nearby.
Roof leak investigations in NW7 and N20 are booked the same way as anywhere else. We cover properties on Daws Lane, Byron Road and High Street. We also cover the places around Mill Hill: The Hale (1 mile west), Burnt Oak (1 mile south-west), Grahame Park (1 mile south), Totteridge (2 miles north-east) and Edgware (2 miles west). We also work in nearby towns such as London (10 miles south-east), City of Westminster (8 miles south-east), Marylebone (8 miles south-east), Kensington (8 miles south), St Pancras (8 miles south-east) and Shoreditch (9 miles south-east).
Around Mill Hill
Locally, jobs take us to homes and businesses close to Mill Hill School, Copthall School and Bittacy Hill Park, among other places. Also close by are Francis Skaryna Belarusian Library and Museum (2 miles east) and Rising Sun pub (0.7 miles north-west). For rail, the closest station is Mill Hill Broadway station, roughly 1 mile south-west of the centre. Well-known places in the area include Broadwalk Centre (2 miles west) and Francis Skaryna Belarusian Library and Museum (2 miles east). The countryside around Mill Hill includes The Mill Field and Darland's Lake.
For landlords and managing agents
Shared roofs need a little more planning: we need access agreed with the freeholder or managing agent. Mention it when you get in touch and we will plan the survey around it.
We also survey roofs for businesses and commercial landlords. Bigger roofs take more time, so they’re priced to suit.
Roof by roof
Lead flashings
Lead flashings seal the joints at chimneys, walls and dormers. Lifted, split or slipped lead is a common cause.
Parapet and box gutters
Some older terraces have a butterfly roof with a valley gutter in the middle. Problems there frequently show in the rooms on the top floor.