The dust ridge along a 1930s picture rail is the first thing a check-out clerk reaches for on this side of Sidcup, and on a Blackfen Road semi that has not been touched in four years it is a guaranteed grey line in every room. So the only clean worth booking is the one built around that report, not a hopeful tidy. We are Monster Cleaning, working these interwar streets since 2014. An end of tenancy clean runs from £156 for a studio, with a 48-hour re-clean guarantee behind it, or £30 per hour per cleaner if you would rather book the time. Ring 0333 555 2076 for a price.
Last updated June 2026. We cover West Sidcup, Blackfen, Penhill and Marlborough Park, the DA15 8 streets running north toward Blendon. This page sits inside the borough directory at End of Tenancy Cleaning Bexley.
Why the 1930s semi belt is where deposits go
Start with the houses, because the houses explain almost all of it. The streets running north from Sidcup town centre toward Blackfen and Blendon went up fast in the late 1920s and through the 1930s, after the Danson estate land was sold off in 1922 and the speculative builders moved in. New Ideal Homesteads laid out most of Blackfen, with Leech and Smith building alongside them, and the result is road after road of bay-fronted semis: Blackfen Road, Days Lane, Westwood Lane, Wellington Avenue, the Penhill Park and Marlborough Park estate turnings. A three-bed semi on the Penhill Park estate sold for £395 freehold in 1933. Most are let now, and they still carry the long-life surfaces that decade built in.
Those surfaces are exactly the ones a clerk in DA15 is trained to itemise. Deep original skirtings that show every scuff along their length. Picture rails and the coving line above them, which collect a dust ridge a vacuum never reaches. Generous bay windows in the front room, with reveals that haze and a carpet band by the bay door that wears to grit. An airing cupboard on the landing, a loft hatch, a side return that became a utility area. None of that exists in a new-build flat, and all of it takes time to bring back.
The other half of the problem is how long people stay. This is family-rental country, gardens and a garage, schools within a pram-push, so tenancies here run for years rather than months. Real wear builds up: traffic lanes worn into the lounge carpet, pet hair pressed deep into the stair runner, grease behind a cooker that nobody has pulled out since they moved in. A clerk walking a four-year family let is not ticking a quick box. They are reading a house that has been properly lived in.
A clerk walking a four-year family let is not ticking a quick box. They are reading a house that has been properly lived in.
The deposit framework is what gives all this teeth. Under the Tenant Fees Act 2019 a deposit on a tenancy with rent below £50,000 a year is capped at five weeks’ rent, and it has to sit in a government-backed scheme, whether that is the Tenancy Deposit Scheme, mydeposits or the Deposit Protection Service. At check-out your landlord can deduct for cleaning only where the property comes back below its checked-in condition. The report decides that. If the inventory recorded the oven as clean on day one and it is greased on the last day, that line is yours to pay. Hand the house back at the standard the report was written against, with your own dated photos and a professional clean behind you, and the cleaning argument simply does not start.
The Bexley licence question, answered plainly
Landlords letting on this side of Sidcup ask us about licensing more than anything else, so here is the current position. Bexley Council runs a selective licensing scheme, but it is designated for Belvedere ward only. It became operative on 13 January 2025 and runs to 12 January 2030, covering roughly 2,300 private rented homes in that one ward across the far north of the borough. West Sidcup, Blackfen, Penhill and Marlborough Park are not in it. A standard single-family let on a Days Lane or Westwood Lane semi does not need a selective licence today.
That can change, and licensing schemes do get extended when they come up for renewal, so it is worth a check on the council’s own property licensing pages before you let. A licence is a separate question from cleaning in any case. Whether or not your street is in scope, a documented professional hand-back is part of running a let cleanly, and it is the bit that protects you at the deposit stage if a tenant disputes a deduction. The lettings market out here is busy enough that agents hold a consistent written check-out standard across the thirties stock, and we clean to that standard rather than to a vaguer idea of clean enough.
What 1 May 2026 did, and did not, change here
The Renters’ Rights Act 2025 went live on 1 May 2026. Section 21 no-fault evictions are gone, every existing assured shorthold tenancy has converted to a periodic one, and a tenant can now give two months’ notice at any point in the year rather than waiting out a fixed term. That is a real change for landlords planning a re-let.
Here is the part people get wrong. The cleaning side of a move-out did not change at all. The Tenant Fees Act still applies. The check-in benchmark still applies. The deposit maths is exactly what it was the week before. What changed is timing. Move-outs across the DA15 streets are more frequent now and less predictable, because tenants are no longer pinned to a fixed end date, so the slot you want before a hand-back is harder to land if you leave the call late. The practical takeaway is dull and it pays for itself: book the clean earlier than you used to.
The 57 points, walked room by room
This is the hand-back clean, the one that takes an occupied house back to inventory standard so the keys go to the agent and the deposit comes back. It is not a maintenance tidy and it is not a deep clean for somewhere you are staying in. One fixed-scope visit, worked against a 57-point agent-approved checklist, room by room. Here is the shape of a standard West Sidcup job.
The kitchen, where most of the money is
The oven comes apart rather than getting wiped. Door glass is split and degreased between the panels, racks and trays soak, the interior, fan and element are brought back, and the narrow gap beside the cooker in these thirties galley kitchens is cleared of the grease and crumb build that a tenant clean almost never reaches. The extractor hood is degreased inside and out and its metal filter soaked or swapped. Every cupboard is emptied and wiped inside and out, hinges and handles included, with the plinths and the floor void behind them done. Fridge and freezer defrosted and cleaned through once you have switched them off, washing machine drawer and door seal scrubbed, dishwasher filter cleared. Worktops, splashbacks and grout lines scrubbed, sink and taps descaled and polished, waste and overflow flushed.
The bathroom, the other place it goes wrong
These houses keep original-footprint bathrooms that were never designed around modern fittings, so they take a little longer. Bath, basin and toilet brought back inside and out, including behind the pedestal where nobody looks but the clerk. The screen, the chrome and the tile and grout line cleared of the hard-water scale that builds fast on Sidcup water. Extractor vent wiped, mirror and cabinet done, floor taken into the corners.
Bedrooms, living rooms and the bits people forget
- Picture rails and coving: the grey dust ridge taken off by hand, the single item clerks flag most in these houses
- Deep skirtings and doors: skirtings wiped along their full run, scuffs lifted, door tops, frames, handles and the panelled faces all done
- Bay windows: all interior glass cleaned frame to frame, the front-room reveals where the haze sits given particular attention, sills and catches wiped
- Wardrobes and fitted units cleared inside, mirrors and glass done, switches and sockets cleaned
- Carpets and stairs: hard floors washed, every carpet vacuumed, the worn lounge lanes and the stair runner worked harder
- Throughout: cobwebs off the ceilings and the airing-cupboard corners, radiators and their backs, banisters, the loft hatch surround, light fittings, vents and the meter cupboard finished off
Carpet shampooing and a deeper oven treatment are the common add-ons on this stock, priced separately and listed below. Curtains, blinds or any exterior glass we agree before the visit, so the quote is the price you pay. As one tenant off Westwood Lane told us, the bit that surprised her was “how much came off the skirtings and the rails that I genuinely thought were clean.”
Where the re-clean guarantee earns its keep
Most of our DA15 jobs pass first time. The 48-hour re-clean guarantee covers the rest, and after years on the thirties stock the same short list accounts for nearly every callback: the picture-rail and coving dust, the gap beside the cooker, the hard-water film on the bathroom, the carpet traffic lanes and pressed-in pet hair, and the landing airing cupboard with the loft hatch surround. If a clerk pulls up any of those within two days of our visit, we come back and put it right at no charge.
What Thames Water leaves on a Blackfen bathroom
DA15 sits in a Thames Water supply area and the water here is hard, running at around 241 parts per million according to Thames Water’s own hardness data. That one fact costs more deposits out here than almost anything except the oven. Calcium builds on taps, shower heads, screens and tile joints faster than tenants expect, and a wipe with a cloth does nothing to it.
The clerk checks for it deliberately. They run a thumbnail down the tap, they look at the shower screen edge-on against the light, they pull the shower head in close. Scale that has set into chrome is not a quick job, and on the original-footprint suites these houses keep, the film comes back the moment the light hits it if it was only rinsed. We treat the fittings with a proper scale remover and work them until they read clean instead of just wet. A Blackfen Road landlord told us last spring it was “the first check-out in three tenancies where nobody argued about the bathroom,” which is the whole point of doing it properly the first time.
We treat the fittings with a proper scale remover and work them until they read clean instead of just wet.
Blackfen Road to Days Lane: the stock changes as you go
We work the whole western and northern side of Sidcup, up into Blackfen and toward Blendon. That takes in Blackfen Road and the parades of shops around it, Days Lane and the turnings by the recreation ground, Westwood Lane, Wellington Avenue, Penhill Road, the New Ideal Homesteads roads across Marlborough Park, and the streets around Lamorbey Park and Sidcup Place. The houses backing onto the Days Lane recreation ground and the green toward Lamorbey are a regular fixture on our DA15 round.
The stock is not uniform, and that matters for a quote. Closer to Sidcup town centre and the station you find a fair share of converted floors and purpose-built flats. The further north you go up Blackfen Road, out toward the parades at Marlborough Park, the more it becomes solid family houses on the thirties estate roads, with garages, side returns and back gardens. A clerk walking a three-bed Penhill semi has far more surface to itemise than one inspecting a one-bed flat near the station: a full landing, an airing cupboard, a loft hatch, a utility in the side return, original windows in every room. The clean has to be scoped to the actual house, which is why we quote on bedrooms and property type rather than a flat per-job figure.
Sidcup station sits on the Dartford Loop, opened back in 1866, with Southeastern running four trains an hour to Charing Cross off-peak, two of them direct and two via Lewisham, plus Cannon Street trains in the peaks. We know the parking pattern on the narrower estate turnings well enough to get a van close on a hand-back day, which on a move-out with several trips in and out is not a small thing. If you are anywhere inside DA15 between the station and the A20 Sidcup bypass, or up toward the Oval shops at Marlborough Park, we cover you.
What it costs, and the sum nobody does in time
Flat end of tenancy pricing, no surprise lines on the day. The figures are the same across the borough, and West Sidcup carries no central-London premium.
| Property | Typical duration | Estimated cost |
|---|---|---|
| Studio or converted floor near the station | 3-4 hours, 1 cleaner | From £156 |
| One-bed flat | 4-5 hours, 1-2 cleaners | From £207 |
| Two-bed semi or converted floor (the common let) | 5-6 hours, 2 cleaners | From £243 |
| Three-bed semi off Days Lane or Penhill Road | 6-8 hours, 2 cleaners | From £339 |
| Four-bed family house with side return | 8-9 hours, 2-3 cleaners | From £425 |
| Carpet shampoo, per bedroom | Same visit | From £36 |
| Oven deep-clean, single | Same visit | From £77 |
If you would rather book cleaners by the hour the rate is £30 per cleaner. Carpets are the usual add-on on this stock and are charged on top: £36 per bedroom, £43 for a living room, or £115 for whole-flat carpet shampoo across a two-bed. A deeper oven treatment, if you want it taken further than the standard checklist, is £77 for a single, £110 for a double and £114 for a 90cm range cooker. A typical three-bed off Penhill Road with the lounge and two bedrooms shampooed and a double oven done lands a little over the £339 base once those are added. We give you the full figure before we start, not after.
Now do the sum the deposit makes you do. A two-bed at £243 against a deposit of five weeks’ rent, which on a DA15 family semi is well into four figures, is not really a decision. Most tenants only run that sum after they have tried, failed the check-out, and lost the first round, which is a shame, because the first round is the cheap one to win. Across thousands of these jobs we hold a 97% first-time pass rate, and we have helped tenants and landlords recover more than £1.2m in deposits that would otherwise have gone on cleaning deductions. We are on the books of 300+ letting agents, and the offices covering West Sidcup and Blackfen know our reports.
We had been in a three-bed semi off Days Lane for nearly five years, two of us and two children, and the place had taken a proper family beating. The clerk had flagged the carpets and the picture-rail dust hardest at check-in, and four years on there was a grey line along every rail and worn lanes through the lounge. Monster did the rails and coving the whole way round, machined the lounge and both children’s rooms, and got the lot photographed. The report came back with nothing held against cleaning, and we kept the carpet replacement money that had been hanging over us.
Karen R., Penhill DA15 8, March 2026
What your clerk actually writes down
A DA15 check-out clerk walking one of these houses works in a consistent order, and on the thirties stock it runs roughly like this:
- Oven, racks, trays and the door glass, then the gap to the side of the cooker
- Extractor filter and the wall behind the hob
- Kitchen units inside and out, plinths, and the floor void behind the appliances
- Bathroom suite, screen, chrome and the tile and grout line, checked for hard-water scale
- Picture rails, coving and the deep skirtings, run by finger and by eye
- Bay windows and reveals, all interior glass, sills and catches
- Carpets: traffic lanes, the stair run, edges and any pet hair, photographed against the check-in
- Airing cupboard, loft hatch surround, radiator backs and the high corners
- A final walk against the inventory photos, with the deduction list written there and then
Our checklist is built backwards from that walk, which is why the work matches what the clerk is looking for rather than a generic clean. The dated before-and-after photos we leave you are the evidence pack if anyone tries to deduct later, and a tenant with that paper trail rarely loses at the deposit stage.
Booking it without the month-end scramble
Booking is one phone call. Here is how it goes.
- Ring 0333 555 2076 or email [email protected] with the address, the number of bedrooms and your check-out date.
- We give you a fixed quote on the spot: base price plus any carpet or oven add-on, no day-of surprises.
- We book a slot that lands before your hand-back, ideally once the place is cleared so we can reach every surface.
- The team works the 57-point checklist room by room and flags anything that needs your call.
- If the agent or clerk raises anything cleaning-related within 48 hours, we come back and put it right at no charge.
Two or three days’ notice is usually enough. Month-end is the exception. Most check-outs land on the last few days of the month, the slots go, and ringing on the 29th for the 31st often leaves you stuck. Give us your hand-back date as early as you can and the day-before slot is far easier to hold.
End of tenancy, deep, regular: which one you need
People mix these up and book the wrong one, so here is the plain distinction.
- Check-in inventory report
- The document a clerk writes on day one describing every surface, usually with photos. It is the benchmark your check-out is judged against, which is why we clean to it rather than to a generic idea of clean.
- End of tenancy clean
- Built to pass that inventory and get a deposit back, done with the house empty, carrying the 48-hour re-clean guarantee, from £156 or £30 per hour per cleaner.
- Deep clean
- A deep clean resets a home you are keeping, lived-in, with no formal standard to hit, from £30 an hour.
- Regular domestic clean
- A regular domestic clean is ongoing upkeep, from £22 an hour on a weekly visit.
If carpets are the worry on a long family let, our carpet cleaning service and the oven cleaning service fold into the same booking. Next door to West Sidcup we also cover Sidcup, Lamorbey and Longlands, so a tenancy that straddles the boundary is no problem.
Questions we get asked
How much is end of tenancy cleaning in West Sidcup?
A studio is £156, a one-bed £207, a two-bed £243, a three-bed £339 and a four-bed £425. Most West Sidcup lets are two- or three-bed thirties semis, so £243 to £339 covers the bulk of jobs before any carpet or oven add-on. Hourly booking is £30 per cleaner.
Do you clean the 1930s semis off Blackfen Road and Days Lane?
Yes, that is the core of our DA15 work: the New Ideal Homesteads and Penhill-era semis around Blackfen Road, Days Lane, Westwood Lane, Penhill Road and the Marlborough Park estate roads. We know where the picture-rail dust, the cooker-side grease and the bathroom scale sit in these houses.
What is the 48-hour re-clean guarantee?
If your letting agent or the inventory clerk raises any cleaning issue within 48 hours of our visit, we return and put it right at no extra cost. It covers the cleaning we were booked to do, and it is why our DA15 jobs rarely turn into a deposit argument.
Will this get my full deposit back?
We cannot guarantee a deposit outcome, because that is the landlord and clerk’s call against the check-in report. What we can say is that our work holds a 97% first-time pass rate and has helped recover more than £1.2m in deposits. Cleaning to the report standard removes the cleaning grounds for a deduction.
Do I need to be out of the property before you clean?
Ideally yes. An empty house lets us reach behind the appliances, into the wardrobes and along every skirting and rail, which is exactly where a West Sidcup clerk looks. We can work around some furniture, but tell us in advance so the quote and the time allowed are right.
Is carpet cleaning included in the price?
No, carpet shampooing is a separate add-on, because not every job needs it. It is £36 per bedroom, £43 for a living room or £115 for whole-flat carpet on a two-bed. On a long family let off Days Lane or Penhill it is usually worth doing, as worn carpet is a common check-out flag out here.
Does Bexley Council require a licence to let here?
Not on this side of Sidcup. Bexley’s selective licensing scheme is designated for Belvedere ward only, operative from 13 January 2025 to 12 January 2030, so a standard single-family let in West Sidcup or Blackfen does not need a selective licence. It is worth re-checking the council’s pages before you let, as schemes can be extended.
Why is the bathroom scale such a problem in Sidcup?
DA15 is a Thames Water hard-water area, running at about 241 parts per million. On the original-footprint bathrooms these thirties houses keep, scale builds quickly on screens, taps and tile lines, and a quick wipe leaves a film that shows under inspection. We treat the fittings with a scale remover and work them until they read clean.
Do you cover Blackfen, Penhill and Marlborough Park as well as West Sidcup?
Yes. We cover the whole western and northern side of Sidcup up into Blackfen and toward Blendon, including Penhill, Marlborough Park and the streets around Lamorbey Park and Sidcup Place. If you are inside DA15 between Sidcup station and the A20 bypass, we reach you.
How far ahead should I book?
Two or three days’ notice is usually enough, but month-end gets busy across DA15. The earlier you call with your hand-back date, the easier it is to land a slot the day before your check-out.
Can you do the oven to a higher standard than the checklist?
Yes. The standard 57-point checklist already strips the oven, but if it has years of baked-on carbon you can add a deeper oven treatment: £77 for a single, £110 for a double, £114 for a 90cm range. We will tell you on the quote whether your oven needs it.
Do you work with local Sidcup and Blackfen letting agents?
We are on the books of 300+ letting agents, and the offices covering West Sidcup and Blackfen recognise our reports. We clean to the written check-out standard their inventory clerks use across the thirties stock, which is why our reports are accepted at hand-back.
What happens if I only book an hourly clean and it is not enough?
Hourly booking at £30 per cleaner is fine for a top-up, but it does not carry the 48-hour re-clean guarantee, which is tied to the fixed-scope end of tenancy job. For a check-out where a deposit is on the line, the fixed clean is the one to book.
Other Monster Cleaning services in West Sidcup
Staying put rather than moving out? We also offer carpet cleaning in West Sidcup, oven cleaning in West Sidcup and domestic cleaning in West Sidcup.