Greater London · TR19 inspections and grease testing
TR19 inspections and grease testing in Northwick Park, Greater London
TR19 inspection for Northwick Park, from a team that has been trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Post-clean verification after another contractor’s clean
- Sections of duct that cannot be reached
- Extracts that may be over the 200 micron mean
TR19 inspection in Northwick Park, done properly
Under TR19® Grease, the mean grease thickness should stay at or below 200 microns between cleans, and 500 microns or more at any point needs immediate spot cleaning. Grease testing shows which side of those lines you’re on. The work covers insurer audits, post-clean checks and pre-clean surveys, and common reasons people get in touch are confirming a clean reached the whole system and ductwork where grease may be over the TR19 limits.
In London, few kitchens can spare a day to close, so work in Northwick Park is normally booked for the night or the early hours. Before the clean, we agree loading, parking and roof access with whoever manages the building.
Good records are part of the job. You get a written report with pictures after every visit, covering the work done, any areas we couldn’t access and a recommended next date. Keep it with your fire safety records so it’s ready for an insurer, fire officer or EHO.
- Where
- Northwick Park (HA1, HA3, HA0)
- Region
- Greater London
- Records
- Certificate plus before-and-after photos
- Quotes
- Fixed quote, usually within a working day
- Working hours
- When your site is closed, plus a 24/7 line
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
For landlords and multi-site operators
Running several sites is easier with one contractor. We work across London and the South East, so visits at different addresses can be planned together and kept to a regular schedule.
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we can quote for the whole system.
In-house cleaning or a specialist?
Staff cleaning and specialist work aren’t the same thing. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but grease that has passed the filters is out of reach. Reaching it takes a specialist with the right equipment.
Day-to-day cleaning is something your team can do: wiping down canopy surfaces, cleaning filters and keeping a simple log. What they cannot safely do is clean inside the ductwork, the fan or the risers, and that is where we come in.
TR19 inspection around Northwick Park
Food Standards Agency data counts about 237 restaurants, cafés and works canteens and about 107 sandwich bars and takeaways in and around Northwick Park, up to about a mile and a half out. For any of them with a canopy, measuring grease is better than guessing when to clean. In Northwick Park, food businesses are inspected by environmental health officers from Harrow council. Extraction counts as kitchen equipment, so its condition can come up on the day. A TR19® certificate and photo report after each clean gives you a record to show an inspector. The fire and rescue service for Northwick Park is London Fire Brigade. Fire and rescue authorities enforce the Fire Safety Order in most non-domestic premises, and in a kitchen that fire risk includes the grease in the extract.
If you look after a school kitchen, at a school such as Harrow High School or anywhere near Northwick Park, the holidays are the usual time for a TR19® clean. A hospital like Northwick Park Hospital, about within half a mile north-east, is the kind of site where a kitchen may cook for patients, staff and visitors all day. Commuter trade near Kenton station can mean long cooking hours, and long hours put a kitchen into BESA’s more frequent cleaning bands.
Northwick Park is about 1 mile south-west of Kenton, in Greater London. For TR19 inspection in and around Northwick Park, please give us a ring on 0345 646 2711 or email us for a fixed quote. Our area covers London and the South East, Northwick Park included. Northwick Park is one of 764 towns, villages and districts in Greater London where we work for TR19 inspection. For sites nearby, see our London page, about 11 miles away.
Here we cover the HA1, HA3 and HA0 postcode area for TR19 inspection. That includes premises on Lyon Road, Manor Road and Gayton Road and the roads around them. Northwick Park sits on or near the A404, which makes travel easy for TR19 inspection. If your site is just outside Northwick Park, we cover 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). Within a short drive, we also cover 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).
Landmarks near Northwick Park
Locally, jobs take us to businesses close to St Anselm's Catholic Primary School, Orley Farm School and Preston Park. The nearest railway station is Kenton station, roughly 0.6 miles north-east. Nearby you’ll also find Northwick Park Hospital (less than half a mile north-east) and Kodak Museum (1.5 miles north-west). Open spaces near Northwick Park include Masons Field and Northala Fields.
Honest limits
A few issues sit outside what this work can do:
- Removing the grease, which is a separate clean
- Installation problems, which fall under design guidance such as DW172
- The responsible person’s own fire risk assessment
If you’re not sure, just call 0345 646 2711 or send us an email and we will give you a straight answer.
What we work on in Northwick Park
- Wet film thickness tests
- Insurer audits
- Deposit thickness tests
- Access surveys
- Post-clean checks
- Pre-clean surveys
What the work involves, part by part
Restaurants, pubs and hotels
Kitchens that cook for long hours build up grease faster. Regular testing shows whether the cleaning interval keeps up.
Canopy and plenum
Clean-looking filters don’t mean a clean plenum. That’s why we test behind them.
Northwick Park questions
Who inspects food businesses in Northwick Park?
In Northwick Park, it’s Harrow council that carries out food hygiene inspections. An officer may look up into the canopy, so clean filters on the day and a recent certificate on file both help.
Which fire and rescue service is responsible for Northwick Park?
London Fire Brigade is the fire and rescue service for Northwick Park. If a fire safety officer visits a commercial kitchen, they may ask about the fire risk assessment and how the extract is kept clean.
Can you verify a clean after it’s been done?
We visit after a clean, take readings at set points and photograph the system. The report flags anything missed.
At what point does grease need cleaning?
TR19® Grease says grease should not go over a mean of 200 microns between cleans. Any reading of 500 microns or more needs immediate spot cleaning.
Do you work out of hours?
Yes. Give us your opening hours with your enquiry and we will plan the visit around them.
Are you accredited?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
Can one contract cover all our sites?
Yes. We work across South East England and London, so we can schedule a run of sites as one programme. Every site has its own report.
Do you offer emergency callouts?
Yes, any time. For anything urgent, such as a fan failure or damage after a fire, ring the 24/7 line and we’ll talk you through the next steps.
Why it’s worth doing now in Northwick Park
Do not wait for an EHO visit or insurance renewal to find gaps in your extract records. An inspection now gives a site in Northwick Park a current picture. A booked night’s work in Northwick Park costs you no trading time; an unplanned closure does.
No two sites are the same, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all make a difference.
Why choose Duct Doctor in Northwick Park
- One contact for all your sites in London and the South East
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- A fixed price before any work starts
- Evenings, overnight and weekends, plus 24/7 emergency callout
Take a look at what affects the cost or our accreditations and certificates.
Places near Northwick Park
Also in Northwick Park
How it works
A visit follows the same order every time: sheeting and protection first, isolate whatever needs isolating, carry out the TR19 inspection, tidy up and hand over the paperwork. On site, the work takes a morning or less for one kitchen, more where there are several systems. For a job in Northwick Park, tell us about loading bays, permits, lifts and roof access when you book.
- We go through any past certificates and reports.
- We follow the extract from canopy to discharge.
- Access panels are located and any missing ones noted.
- We measure the grease and photograph each point.
- You get a report and a fixed quote for the clean.
How to prepare
- Let us know about parking and loading
- Name a contact who can let us in at the agreed time
- Find the previous report, if there is one
How to get a quote
Here’s what helps us quote: the address, the type of site and when it’s open, a few pictures and the last certificate or report, if there is one. Once you have those, give us a ring on 0345 646 2711 or send us an email.
Related advice
What affects the cost of TR19 inspection
Some jobs are bigger than they look, and some smaller. The main factors:
- Site rules, permits and inductions
- Whether several sites go on one quote
- What state the system is in
- Parking and loading at the site
One small site or a whole estate, the quote is built the same way: the work involved, the access and the timing. You will have a fixed price before we start.
What we need to know
To help us quote quickly, please include:
- Your opening hours and when the area is out of use
- Close-ups of filters, grilles, hatches or access panels
- The roof, plant room or outside wall the system runs to
- Photos showing the whole system and its surroundings
If you need TR19 inspection in Northwick Park, give us a ring on 0345 646 2711 or send us an email. Tell us what kind of premises it is and when it’s open, and send pictures or your last report if you can. We typically send a fixed quote within one working day.