We confirm within 1 hour (8am–7pm). Your reference: . In a hurry? Call 0333 555 2076.
We work with over 300 letting agents
End of tenancy cleaning in Charterhouse, the cluster of period flats, Art Deco mansion blocks and almshouse streets around Charterhouse Square EC1M, between Farringdon and the Barbican, done by a crew that has worked this postcode since 2014.
Studios from £174, one-beds from £225, three-bed houses from £357, all to a checklist matched to the clerk’s report. We clean Florin Court studios, the terraces on Carthusian Street and Hayne Street, the warehouse conversions behind Charterhouse Street and the new-build flats off Aldersgate Street. 0333 555 2076.
Stand in the middle of Charterhouse Square and you can see four building eras at once. That is unusual, and it is the whole reason cleaning a flat here is harder than the rent suggests.
Florin Court, the 1936 Art Deco block most people recognise as Hercule Poirot’s Whitehaven Mansions.
Behind Charterhouse Street and along toward Bartholomew Close
The warehouse conversions and new-build flats that arrived in the last twenty years.
Each era cleans differently. A 1930s bathroom does not take the same products as a 2018 wet room. A lath-and-plaster wall behaves nothing like new plasterboard when you wipe a skirting. The check-out clerk knows this, and writes the inventory accordingly.
Florin Court
Florin Court is worth knowing in its own right, because it is the building we are in most. Guy Morgan and Partners built it in 1936 in the Art Deco moderne style:
a curved brick front with stepped-back upper floors
a roof garden
a basement that still holds a swimming pool, a sauna and a gym
The flats kept their period proportions through later refurbishments: narrow halls, original ironmongery, steel-framed windows, and in many of them the herringbone parquet that gives a clerk so much to look at.
It is a listed building, which is part of why the interiors have survived more or less intact, and part of why a careless clean does real harm.
How this page runs
So this page is organised the way the Square is built:
the deposit at stake
what a heritage clerk actually looks for
the cleaning chemistry that keeps you out of trouble
the streets we cover
the room-by-room work
the price
the law you are moving out under in 2026
how booking fits around your check-out
If you only read one section, read the one on chemistry.
The deposit maths on an EC1M tenancy
EC1M is one of the dearer rental postcodes in central London, and the deposits track the rent. On current listings:
Florin Court
Studios let at around £2,000 pcm, with a larger studio nearer £1,600 and a one-bed at about £2,500 pcm.
One-beds around the Square and along Carthusian Street
£2,500 to £3,200 pcm.
Two-beds inside the period buildings
Well above £3,800 pcm.
The deposit
Capped at five weeks of rent on annual rents under £50,000, so the sum your landlord holds usually falls between £2,300 and £4,400.
That is too much to lose over a greasy extractor filter or a streak on the oven glass.
The deduction is rarely about a dirty flat. It is about the gap between a tenant clean and an inventory clean. On heritage stock that gap is wide, because the clerk is checking surfaces a domestic clean never touches and comparing them line by line against a report taken the day you moved in.
We work to that report. Our approach is dull rather than clever: we clean the things clerks check, in the order they check them, and we photograph the result.
What a heritage check-out clerk actually flags
The clerks who work EC1M are a small group and they check the same things in the same order. The list below is what we have seen flagged in real Charterhouse check-outs over the past eighteen months, and knowing it is most of the battle.
Oven door glass, the intermediate pane between the panels especially
Extractor filters; the ceiling-set units in Florin Court are flagged more than any other type
Limescale on taps, shower heads and tile grout, since the Square is in a hard-water area
Parquet edges at the door thresholds, where the swing of the door scuffs the finish
Crittall window joints, where dust hides until it is photographed
Skirting in the period flats; the clerk runs a finger and if it shows, you pay
The inside of a cast-iron radiator and the wall behind it
Sash runners and the bottom rail of the lower sash
Intercom handsets and the entry panel, where a fingerprint reads instantly
The cupboard above the wardrobe, where a year of dust gathers
Behind the fridge, including the condenser grille
The manifold cupboard for underfloor heating in the newer flats, usually never opened
The tops of internal doors, almost always missed by a tenant clean
The outside face of the front door, dirty from the corridor
None of that is exotic. It is just thorough, and a tenant cleaning their own flat on moving day, tired and surrounded by boxes, will skip half of it without meaning to.
We are on the books of 300+ letting agents, and that list is essentially their collected grievances written down.
Read the building before you reach for a product, because the building decides the chemistry.
A job our cleaners finished in Islington.
Cleaning chemistry, and why the wrong product marks a flat
This is the section that saves deposits around the Square, so here it is plainly. Old surfaces and modern cleaning products do not always get on, and the damage from the wrong product can cost more than the dirt it was meant to remove.
From one of our jobs in Islington.
1930s bathroom tile
The tile in a Florin Court flat has a soft glaze, and a standard acidic limescale remover will etch it; the mark is permanent and a clerk will log it as damage rather than wear. We use a non-acid descaler on heritage tile and save the stronger stuff for modern ceramic.
Parquet
The other classic trap. Mop water sitting on a herringbone floor swells the blocks and lifts the edges, so we vacuum, damp-wipe with a wood-safe cleaner, and finish with a polish only at the thresholds where the wear actually shows.
Engineered timber
The engineered timber in the new-build flats wants a neutral-pH solution and a barely damp mop, nothing more.
Cast-iron radiators
In the period flats they hold dust between the fins and behind the wall face, and they need brushing out rather than a quick wipe.
Crittall and steel window frames
The same idea in miniature: dust in every joint, invisible head-on, obvious in a clerk’s flash photo.
Painted timber panelling
In the almshouse-owned interiors it takes an oil soap, not a spray cleaner.
Stone flagstones
Some of those hallways take a pH-neutral solution so the surface does not dull.
Read the building before you reach for a product, because the building decides the chemistry.
The streets and buildings we cover
We cover the Square and the streets that feed off it. Florin Court is the building we are in most, but the period terraces and the newer flats nearby keep us busy too.
Charterhouse Square, every side
Florin Court, all floors
Carthusian Street
Hayne Street
Charterhouse Street, north side
Charterhouse Mews
Glasshouse Yard
Aldersgate Street, the Charterhouse end
Bartholomew Close
Cloth Fair
Long Lane, the EC1A end
Britton Street, the Square end
The Charterhouse private lets around the green
The Charterhouse itself does not let on the open market; the Brothers are placed by the charity. It does own a handful of flats and houses around the Square, though, and a few of those come up to private let, with painted panelling and restored stone underfoot.
If you are leaving one of those, tell us when you book, because the products change.
Getting a crew into a Square flat on the day
The clean is the easy bit around here. Getting in, and getting the kit up, is the part that catches people out, so a few practical notes before you book.
The Florin Court lift
Florin Court has a single period lift, and it is slow.
First thing in the morning it does not always stop on every floor while the building wakes up, which is exactly when we want to be carrying machines to an upper-floor studio.
The eighth and ninth floors are set back, so the higher studios are a longer haul from the lift than the floor number suggests.
We plan around it, and we allow for that in the timing rather than the price. It is worth knowing if you are coordinating us with a removals van the same day.
Parking
Parking is the genuine headache, and I will not pretend otherwise:
the streets around the Square sit in an Islington controlled parking zone that runs most of the day
the Square itself is gated and largely pedestrianised
Charterhouse Street feeds straight into the Smithfield and Barbican traffic
We carry kit in on foot from the nearest bay more often than not, which is fine; it just means a clean here starts a few minutes later than one with a driveway. If your tenancy comes with a permit or a loading window, mention it when you book and we will use it.
Getting into the flat
Access to the actual flat matters too. Tell us how the keys work, whether there is a concierge or a key safe, and the door or buzzer code, because a crew standing on the pavement waiting for entry is time nobody wants to pay for.
Newer blocks toward Bartholomew Close
There is usually a managed entrance and a fob.
Period houses
It is often just a Yale and a mortice.
None of it is difficult once we know it in advance.
Inside the clean, room by room
Every Charterhouse clean runs to our 57-point checklist, refined since 2014 with the agents who let these flats. We do not skip lines because a room looks clean, and the crew that starts the job is the crew that finishes it. Here is the work by room.
Kitchen
Oven cavity, racks, seal and the door glass, including the intermediate pane where the door design allows, degreased to inventory standard
Extractor hood degreased and the filters soaked and rinsed; the ceiling-set Florin Court units get extra time
Hob and worktop descaled and polished, timber worktops re-oiled
Fridge, freezer, dishwasher and washing machine cleaned inside and out, seals and filters included
Every cupboard, inside and out, tops where we can reach
Sink and taps descaled, waste cleared
Splashback descaled and dried so it does not spot
Floor finished to suit the material, whether vinyl, tile or engineered timber
Bathrooms
Bath, basin, WC and shower descaled, non-acid on any heritage tile
Grout and silicone cleaned, mould treated where it has taken hold
Shower screen polished both sides so it holds up under angled light
Taps, shower head and waste covers descaled
Mirror and cabinet glass left streak-free
Extractor grille taken off, cleaned and refitted
Towel rail, radiator and the pipework we can reach
Floor scrubbed, skirting wiped
Period rooms and living areas
Wardrobes and drawers inside and out, tops dusted
Beds lifted and the floor underneath cleaned
Skirting, picture rails and dado rails hand-wiped
Cornice and ceiling rose dusted on poles
Sash windows lifted, runners cleaned, panes done inside and out where we can reach
Crittall and steel frames brushed out at the joints, glass polished
Cast-iron radiators dusted between the fins
Switches, sockets, thermostats and intercom panels wiped
Parquet and herringbone vacuumed, damp-wiped, polished at the thresholds
Carpet vacuumed, with hot-water extraction priced separately
New-build extras and throughout
Engineered timber floors damp-mopped with a neutral solution only
Underfloor-heating manifold cupboards opened, vacuumed and wiped
Internal doors both sides, frames, handles and hinges
Stairs and balustrades hand-wiped
Utility and storage cupboards cleared and cleaned
Bins emptied, washed and put back
A final walk-through, photographed and sent to your phone
57-pointagent-approved checklist4.7our rating on Google£1.2mtenant deposits recovered300+letting agents on our books
What it costs around the Square
Prices are fixed, quoted before we start, with no hourly meter and no surprise uplift on the day. They run a little higher than a standard flat would because the period work and the heritage products take longer.
Property
From
Notes
Studio (Florin Court, Carthusian Street)
£174
Extractor and a full bathroom descale included, oven as an add-on
One-bedroom flat
£225
Period-stock uplift may apply
Two-bedroom flat
£261
Second bathroom included where there is one
Three-bedroom house or flat
£357
Charterhouse Mews, Bartholomew Close
Four-bedroom property
£443
Quoted on inspection
Five-bedroom plus
POA
Site visit, fixed quote within 24 hours
Carpet add-on, per bedroom
£29
Hot-water extraction
Living room carpet
£36
Hot-water extraction
Two-bed carpet package
£94
Bundled with the clean
Oven only, single
£95
Standalone booking
Oven only, double or 90cm range
£128–£161
By cavity count
If you are not sure which row you fall into, ring and describe the flat. We would rather quote it right than have you guess.
The law you are moving out under in 2026
The Renters’ Rights Act 2025 came into force on 1 May 2026. The headline is that a landlord can no longer end your tenancy on a whim.
It scrapped Section 21 no-fault evictions.
It turned assured shorthold tenancies into rolling periodic ones.
It brought in a Decent Homes Standard for private rentals.
What the Act did not touch is the deposit cap or the protection rules. Your deposit is still held in one of three approved schemes, and your landlord still has to produce a written check-out inventory before deducting a penny for cleaning. Turn up with a professional clean and there is nothing on that inventory left to flag.
Deposit protection scheme
By law your deposit sits with one of three government-approved schemes: TDS, DPS or mydeposits. At the end of the tenancy the scheme holds the disputed money until landlord and tenant agree, or it is adjudicated.
Check-in inventory
The dated report and photographs taken when you moved in. Every cleaning deduction is judged against it, which is why the clerk works line by line.
Additional HMO licensing
Run by the London Borough of Islington, the borough-wide Additional HMO scheme renewed on 1 February 2026 and runs to 2031. It covers flats and houses shared by three or four unrelated people.
Selective licensing
A separate Islington scheme, currently in Finsbury Park, Hillrise and Tollington wards and expanding to others such as Barnsbury, Caledonian and Highbury. Charterhouse Square sits in Bunhill ward, which it does not cover.
The licensing matters more than it looks at a check-out. If your flat was a three or four person sharer, the landlord is licensed, the council holds a file on the property, and any deposit dispute is heard against a regulated tenancy.
In that setting a dated cleaning report with photographs is strong evidence. It is part of why we have helped tenants recover £1.2m in deposits that would otherwise have gone on cleaning deductions.
Three kinds of clean, and the one a check-out needs
People mix these up and book the wrong one. A weekly clean keeps a flat tidy. A deep clean resets it. An end of tenancy clean is the only one written to pass an inventory, and it is the only one that carries the re-clean guarantee.
Task
Weekly
Deep clean
End of tenancy
Oven cavity
No
Yes
Add-on, £31, to inventory standard
Inside every cupboard
No
Some
Yes
Window frames inside
No
Yes
Yes, runners included
Skirting hand-wiped
No
Yes
Yes, every room
Full limescale descale
No
Yes
Yes, non-acid on heritage tile
Carpet hot-water extraction
No
Optional
Optional add-on
48-hour re-clean guarantee
No
No
Yes
Matched to the clerk’s report
No
No
Yes
Photographic walk-through
No
On request
Yes
If a landlord or agent is taking the inventory, you want the end of tenancy clean. A deep clean is the right call before you move in, or as a one-off reset, but it is not built to answer a check-out report.
Booking around your check-out date
Booking is quick. The timing around the clerk is the part worth getting right.
Tell us the address and the check-out date. A flat number in Florin Court, a door number on Carthusian Street, or the reference from your tenancy agreement is enough to start.
We confirm a fixed quote within the hour. No hourly meter, no add-ons sprung on the day. The quote covers the whole 57-point checklist.
We clean the day before your check-out. If the clerk is booked for 11:00 on the Friday, we are in the flat by 09:00 on the Thursday and done by 18:00, which gives the parquet and tile overnight to dry.
We send the photographic walk-through. Every room and every flagged surface, time-stamped. Forward it to your agent the moment it lands.
If the clerk flags anything, we are back inside 48 hours at no charge. That is the re-clean guarantee, and in over a decade we have needed it on under 3% of jobs.
Neighbouring areas and the jobs we add on
Charterhouse cleans often pull in one of our other services. Same crew, same checklist.
Yes. Florin Court is one of the buildings we clean most in EC1M. We bring parquet-safe polish, non-acid tile descaler and extending poles for the extractor hoods that sit in the kitchen ceiling rather than over the hob, and we know the lift does not stop on every floor first thing in the morning.
What is the 48-hour re-clean guarantee?
If your agent or their inventory clerk flags a cleaning issue within 48 hours of our visit, we come back and re-clean the flagged items at no charge. In more than a decade we have needed it on under 3% of jobs.
Should you clean the day before check-out or the morning of?
The day before, almost always. Parquet and tile need overnight to dry properly, and it leaves the morning of check-out free for a quick touch-up if anything needs it.
Do you clean inside the Crittall metal window frames?
Yes. Dust packs into the joints of Crittall and similar steel frames and stays invisible until a clerk photographs it. It is one of the three things flagged most often in Florin Court check-outs. We brush each joint, then wipe and polish the glass.
Is carpet cleaning part of the end of tenancy price?
No, it is a separate add-on: £29 a bedroom or £36 for a living room, bundled at £94 for a typical two-bed. We use hot-water extraction rather than a surface shampoo. Carpet cleaning can also be booked on its own.
Can you handle parquet and herringbone floors?
Yes. We use a wood-specific cleaner that does not raise the grain, then polish the door thresholds where the wear shows. We never damp-mop parquet with ordinary floor solution. There is more on hard floor cleaning if you want the detail.
Will you deal with my letting agent’s inventory clerk for me?
If you want us to, yes. Most tenants would rather forward the photographic walk-through to the agent themselves, which works just as well. Your call.
How far ahead should I book?
Two weeks is comfortable for Charterhouse. The last Friday of the month goes first, so book that early. We will still try to fit a 48-hour booking if you ring.
Do you bring your own products and machines?
Yes. Every cloth, every product, every machine comes with the crew. You do not need to leave anything in the flat for us.
What about the communal parts of Florin Court?
The corridors, the lift lobby and the stairwells belong to the building manager, not the tenant, so they are not part of your clean. We work inside your flat, plus the doormat right outside the door if your tenancy covers it.
Can you clean the underfloor-heating manifold cupboard in a new-build flat?
Yes. In the newer flats around Bartholomew Close that cupboard is almost never opened by tenants and almost always checked by clerks. We open it, vacuum, wipe it down and close it back up.
Will my deposit definitely come back if I book Monster Cleaning?
Cleaning is the part we control, and we have done it for more than a decade in London. If your agent raises something that is not cleaning, such as damaged paint, a missing item or unpaid rent, that is a separate dispute. We have helped tenants recover £1.2m in deposits that would otherwise have gone on cleaning deductions, and we know which cleaning evidence settles an argument. Shelter’s deposit guidance is the clearest free reference if it comes to that.
How can I pay?
Card, bank transfer or cash. We email a receipt within minutes of payment.
Book your Charterhouse clean
Booking takes three steps
Your postcode and the property. The form gives the price.
One number books a Charterhouse clean: 0333 555 2076. Or email office@monstercleaning.com with the address and your check-out date and we will quote inside the hour.
Every job comes with:
the 57-point checklist
the 48-hour re-clean guarantee
the deposit-back focus
Same crew, same standard, since 2014.
A price in about three minutes.
Month-end fills up fast. Book 7 to 10 days before your inspection.
