Greater London · Grease filter exchange
Grease filter exchange in Greenhill, Greater London
A scheduled grease filter exchange, swapping dirty canopy filters for clean ones in Greenhill, surveyed first and signed off with a written report and pictures. Call for a fixed quote.
- A canopy running with filters missing
- Filters that leave gaps in the canopy
- Filters that come out of the sink still dirty
Common questions in Greenhill
Which fire service covers Greenhill?
Greenhill is in the area of London Fire Brigade. A recent cleaning certificate and a note of the next clean date show that grease in the extract is being managed.
Can you come to Greenhill after we close?
Yes. We work evenings, overnight and at weekends. It means the site in Greenhill keeps running as normal. Just phone us on 0345 646 2711, or send details by email with your opening times and we will plan around them.
What about areas you can’t get to?
They’re marked on the report. In ductwork, new access panels are often the answer, which we can install.
Is Greenhill in your area?
Yes. We work in Greenhill and across Greater London, within our South East and London area. To book, call 0345 646 2711 or drop us a line.
Do you have insurance?
Yes. Full insurance covers our work, and we’ve been trading since 2009.
What do you do to protect the area?
Floors and surfaces near the work are sheeted before any work starts, and waste is contained as we go. At the end, the area is cleaned down.
What if some of our filters are damaged?
Damaged filters do not seat properly and let grease through. We flag any we find and explain what’s needed.
Which sectors do you work in?
All kinds of commercial and public premises: from restaurants, pubs and hotels to schools, hospitals, care homes, offices, shops and food production sites. Work is timed around how each site runs.
Grease filter exchange in Greenhill, done properly
A filter that doesn’t sit right lets grease straight past. Gaps in the filter bank are a direct route into the plenum, so we check every one at each visit. We point out any that need replacing. Common call-outs are for filters that come out of the sink still dirty and grease collecting in the filter channels, across baffle filters, restaurants and pubs and mesh filters.
Across London, many commercial kitchens are squeezed into basements and narrow back-of-house spaces, and the duct may run up through several floors before it discharges at the roof. For a kitchen in Greenhill, that usually means a longer system to clean and more access panels to plan around.
The sign-off is always in writing: a dated report with photos of the work, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.
- Where
- Greenhill (NW3, NW6)
- Region
- Greater London
- Paperwork
- Report and photos after the visit
- Quote
- Fixed quote, usually within a working day
- Hours
- Out of hours as standard, 24/7 emergency line
- Phone
- 0345 646 2711
- Checked
- 30 October 2026
Multi-site and managed buildings
Whether it’s one building or many, the standard is the same: diagnosis, a fixed price, work booked around your hours and a written report with pictures.
Keeping records across a portfolio is half the battle. Each visit produces a dated report with photos, ready to show insurers, fire officers or EHOs.
Grease filter exchange in Greenhill: the local picture
Food Standards Agency records list about 617 restaurants, cafés and works canteens and about 268 takeaways within roughly a mile and a half of the centre of Greenhill. Each canopy among them has filters that load with grease and need swapping or cleaning. The fire and rescue service for Greenhill is London Fire Brigade. Its fire safety officers can audit commercial kitchens, and grease in the extract is part of a kitchen’s fire risk. Kitchens in Greenhill get their food hygiene inspections from Camden council. They look at how clean the premises and equipment are, and the kitchen extract is part of that. A TR19® certificate and photo report after each clean gives you a record to show an inspector.
A hall kitchen that only cooks for events, whether near Rosslyn Hill Unitarian Chapel or elsewhere in Greenhill, still needs its extract cleaned, just less often. If you look after a school kitchen, at a school such as The Royal School or anywhere near Greenhill, the holidays are the usual time for a TR19® clean. A kitchen near Hampstead Heath station that serves breakfast and dinner can run its extract twelve hours or more, which shortens the cleaning interval.
Greenhill is about 1 mile north-east of Hampstead, in Greater London. Anywhere in NW3, we cover grease filter exchange for commercial sites. 764 places in Greater London are on our list, from busy centres to quieter spots.
Here we cover the NW3 and NW6 postcode area for grease filter exchange. Whether your site is on Back Lane, Well Road and Ornan Road or a nearby road, our technicians can take on the work. Close by, we work in Hampstead (1 mile south-west), Vale of Health (1 mile north), West Hampstead (1 mile west), Fortune Green (1 mile west) and Haverstock (1 mile south-east). Further out, we also cover London (5 miles south-east), City of Westminster (3 miles south), Marylebone (3 miles south-east), Kensington (4 miles south), St Pancras (3 miles south-east) and Shoreditch (5 miles south-east).
Around Greenhill
Locally, jobs take us to businesses close to Cecil Sharp House, Fitzjohn's Primary School and King William IV Public House. Other local landmarks include South Hampstead High School (0.6 miles south) and Hampstead Heath (0.7 miles north-east). Greenhill has its own railway station: Hampstead Heath station. Other landmarks nearby include New End Hospital (less than half a mile north-west) and Montfichet's Tower (4.3 miles south-east). The countryside around Greenhill includes Belsize Wood and Parliament Hill.
In-house cleaning or a specialist?
Logging matters as much as cleaning. A simple log of filter washes, wipe-downs and checks shows an inspector that the system is looked after between visits, next to our reports.
For ventilation and air handling systems, in-house care is mostly about checks: clear grilles, a log of filter changes and reporting anything odd. The inside of ducts and units needs a specialist.
How we price grease filter exchange
The diagnosis comes before the price. We look at:
- The times the site is available
- The condition of the system
- Travel, parking and unloading
- How big the system is
Several systems or sites on one quote can make for a more efficient booking. Mention every system or site you need covered and we will price it together.
What we need to know
Photos and a few facts are often enough to price the work. Send what you can of the following:
- A few general shots of the system
- The paperwork from the last visit, if you have it
- Close-ups of filters, grilles, hatches or access panels
- The roof, plant room or outside wall the system runs to
To get a fixed quote, phone us on 0345 646 2711, or email photos with the site type, your trading hours and a short description of the system. A few pictures and your last certificate or report help a lot. You will typically have a quote within one working day.
Places near Greenhill
What else we do in Greenhill
What we do, step by step
Every visit runs to the same pattern: protect the area, make the system safe, carry out the grease filter exchange, tidy up and leave you the report. On site, the work takes anything from a few minutes to an hour or so, depending on the number of filters. We fit London jobs around the building rather than the other way round, so a visit in Greenhill is normally out of hours.
- First, we record the size, type and number of filters in each canopy.
- We agree a schedule that suits how much the kitchen cooks.
- On each visit, the dirty filters come out of the canopy.
- Clean, dry filters are fitted in their place, with no gaps left between them.
- If a filter is damaged or the plenum needs attention, we tell you.
Before we arrive
- Let us know when the site is closed or quiet
- Clear loose items from the work area
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Ask for a quote
Here’s what helps us quote: the address, the type of site and when it’s open, pictures of the system and the last certificate or report, if there is one. Once you have those, call us on 0345 646 2711, or send details by email.
Read more
What a clean won’t put right
Some problems need a different service or another trade:
- Smell complaints that need odour control equipment
- A canopy too small for the cooking beneath it
- Grease deep in the extract system
If in doubt, call 0345 646 2711, or send details by email and we will say what we think.
What the work covers
- Baffle filters
- Island canopies
- Mesh filters
- Wall canopies
- School and hospital kitchens
- Restaurants and pubs
Why it’s worth doing now in Greenhill
Filters full of grease are fuel sitting right above the cooking. Flames from the range can be drawn up into the canopy, and from there into the duct. Keeping filters clean takes some of that fuel away. A busy site in Greenhill builds up dirt and wear quickly, so putting it off makes the eventual job larger.
One small site or a whole estate, we price it on the same basis: what needs doing, how we get to it and when. The price is fixed before any work starts.
Why choose Duct Doctor in Greenhill
- Fixed quotes, usually within one working day
- Accredited under CHAS and SafeContractor, with ISO 9001
- In business since 2009
- One contact for all your sites in London and the South East
What the work involves, part by part
The plenum
Behind the filters sits the plenum, where air gathers before the duct. Grease that gets past the filters settles there.
Mesh filters
Layers of mesh catch grease droplets. In a busy kitchen, mesh soon blocks and need frequent attention.