Greater London · London and the South East
Flat roof survey in Underhill, Greater London
Surveys of flat roofs on homes, extensions and commercial buildings in Underhill, carried out by an experienced roof surveyor. Every survey comes with a written report and photos.
- Splits, cracks and crazing
- Ponding water that doesn’t drain away
- Water getting in at rooflights
Flat and commercial roofs around Underhill
The wider area around Underhill has a long history of building, with Wyllyotts Manor about 3.4 miles north. 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 any change of roofing material on a listed home needs checking with the council first. Further from the centre, London’s housing takes in interwar semis with hipped roofs in clay or concrete tiles as well as 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.
Parking in Underhill, as in most of London, takes a little planning: let us know about permits, visitor bays or off-street space when you book. If you let a flat or house near New Barnet station, a flat roof over a rented flat is easy to forget until the tenant reports a leak. Shop and office owners around Spires Shopping Centre may find that flat roofs over shops and units are easy to forget until water comes through a ceiling.
Underhill is about 1 mile west of Barnet, in Greater London. We survey roofs in Underhill and the rest of Greater London. Across Greater London, we cover Underhill. We also survey roofs in London.
Flat roof surveys in EN5 and N20 are booked the same way as anywhere else. Streets in the area include Park Road, May's Lane and Manor Road, and we cover them all. If you’re just outside Underhill, we cover Barnet (1 mile east), New Barnet (1 mile east), Monken Hadley (1 mile north), Hadley Wood (1 mile north-east) and Cockfosters (2 miles east). We also work in nearby towns such as London (11 miles south-east), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (9 miles south) and Shoreditch (10 miles south-east).
Near you in Underhill
Typical jobs here are in homes near Susi Earnshaw Theatre School, Highlands Gardens and The Red Lion pub, among other places. The closest station to Underhill is New Barnet station, about 1 mile east. Well-known places in the area include Francis Skaryna Belarusian Library and Museum (2.2 miles south) and Barnet General Hospital (0.9 miles west). Green spaces nearby include Greenhill Gardens and Darland's Lake.
About our flat roof survey in Underhill
A Basic Survey, from £150, covers a visual inspection, a condition report, photos and written recommendations. For moisture detection and a structural check, the Standard Survey starts from £250. On a flat roof, moisture readings can help show whether water has got under the covering. Bigger commercial roofs are priced on their size and access. We are often asked to look into blocked or damaged outlets and failed upstands where the roof meets a wall, on single-ply membranes, upstands and outlets and EPDM rubber.
Across London, flat roofs are everywhere, from back additions and dormers to roof terraces, blocks of flats and offices. Coverings range from felt and asphalt to EPDM rubber, GRP fibreglass and single-ply membranes, each with its own weak points. Which one is on a roof in Underhill shapes how it is checked. Many older flat roofs are felt or asphalt, and many newer ones EPDM rubber or GRP.
It is not only a list of defects. For each finding, it explains what it is, why it matters and what we’d recommend.
- Place
- Underhill (EN5, N20)
- Wider area
- Greater London
- Price
- From £150 inc. VAT
- Reports
- A written report with photos, by email
- Survey days
- Weekdays, Saturdays and Sundays
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Updated
- 27 October 2026
How we price flat roof surveys
Every roof is different, so prices are confirmed before booking. These are the things that affect it:
- Commercial roofs and larger buildings
- Which survey package you book
- How complicated the roof is, with its valleys, chimneys and parapets
- Height and safe access
Thermal imaging and drone inspection (where applicable) come with the Premium Survey, which starts from £400, inc. VAT. We’ll tell you which package suits the questions you have.
Helping us price your survey
A few details help us suggest the right survey and price. When you contact us, tell us:
- Where water is showing inside, if it is
- What kind of property and roof it is
- Your postcode, so we can check access and travel
- Access details, like a loft hatch or a shared roof
Every survey is priced before it’s booked, so you know the cost up front. Flat roof survey starts from £150, including VAT. For a price for your roof, ring 07833 053749 or send us an email.
The survey, step by step
When we arrive, we start by asking what you’ve noticed and what you’d like to know. We then inspect everything that can be seen safely. Most surveys take roughly 1–2 hours at most homes, or half a day or so for a commercial building. London terraces rarely offer a view of the whole roof from one spot, so a visit in Underhill moves between viewpoints: the pavement, upstairs windows, the loft and any safe spot at the back. Shared stairs or a basement flat? Tell us who holds the keys.
- We start with the address and, on larger roofs, the roof area and access.
- We check the rooms or spaces under the roof for staining where there is access.
- We view the roof from safe positions and never walk on fragile surfaces.
- Each defect is photographed and its likely cause noted.
- The report explains the condition and recommends what to do first.
Before the survey
- Have keys ready for side gates, garages or roof access doors
- Agree roof access with the managing agent if it’s shared
- Leave a clear route to the loft
Booking a survey
To arrange a survey, phone 07833 053749 or use the contact form and tell us the address and what’s prompted the survey. We will confirm the price before you book.
Advice
Surveys for landlords and agents in Underhill
With a portfolio of properties, surveys can be booked for more than one address. To arrange surveys for several addresses, phone 07833 053749 or send us an email.
Managing agents and residents’ management companies use roof surveys to plan maintenance. The report sets out what needs attention now and what can wait.
Leave it or get it looked at?
Caught early, a split or open seam in a flat roof is often a small repair. Leave it, and water can get into the insulation and deck, which can turn a patch into a replacement. A survey now shows which you are dealing with. Many older London roofs have only old felt under the slates, or no underlay at all, so a slipped slate can soon mean water inside. Left unchecked, water soaks into timber and plaster and the damage spreads.
The cost of a survey depends on the roof: how big it is, how high it is, the number of separate roofs and how safely it can be seen. Prices start from £150, including VAT.
What you get with us
- Professional indemnity and public liability insurance
- Satisfaction rate of 98%
- A photo-illustrated written report
- Over 20 years’ experience
Read our cost guide and our case studies.
Practical tips
Small things make a difference, both for the survey and for the roof itself. Some pointers:
- Look for standing water a day after rain
- File the paperwork for the roof and any repairs
- Check ceilings under the roof for damp patches
- Keep outlets clear of leaves and moss
Landlords, owners and managing agents can keep the report as a dated record of the roof. It is useful when planning upkeep and setting budgets, and it gives a baseline to compare against next time.
Try not to let a flat roof become a walkway. If access is needed, boards or walkways help protect the covering, and to keep well clear of rooflights and fragile sheeting.
How the survey changes by roof type
Felt and built-up roofs
Built-up felt is one of the most common flat roof coverings on extensions, garages and dormers. We look for blistering, cracking, split laps and worn mineral surfacing.
EPDM rubber
Rubber roofs can shrink back from their edges or lift where the adhesive has failed. We record any we can see, with photographs.
Towns and villages near Underhill
More services for Underhill
Questions from Underhill
How do I find out if my home in Underhill is listed?
Start with Historic England’s list for listing and your council for conservation areas. It is worth checking before planning roof work, as both can affect what’s allowed.
Is Underhill in the area you cover?
Yes, Underhill is within the area we cover. We cover the whole of London and South East England. Just phone 07833 053749 or use the contact form and let us know about the property.
How many surveys have you done?
Over 20 years and more than 5,000 surveys, across London and South East England.
What if it rains on the day?
A survey can typically go ahead in light rain, and it can even help show where water is getting in. Heavy rain or strong wind can ground a drone and make the roof unsafe, so if conditions are not right we will arrange another day with you.
How much is a survey?
Flat roof survey starts from £150, including VAT. You’ll know the exact price before booking. For a price, ring 07833 053749 or email us.
Do you check flat roofs for asbestos?
Asbestos testing is not part of our survey. Where a roof has materials that might contain asbestos, such as old cement sheeting, the report flags them so a specialist asbestos surveyor can check them.
How fast do I get the report?
The Premium Survey report comes the same day, the Standard within 24–48 hours and the Basic within 48 hours. All of them come by email, ready to forward.