A conservatory can transform a home when the glass is clear, the frames are bright and the roof lets in plenty of light. Unfortunately, it is also one of the easiest parts of a property to neglect.
Rain marks, algae, moss, bird mess, dirt around the frames and debris in the roof channels can build up gradually until the entire structure starts to look tired.
So, how much does conservatory cleaning cost in the UK in 2026?
For a professional clean, a realistic starting point is around £125–£195 for exterior-only conservatory cleaning, with an average of roughly £160. A more comprehensive interior and exterior clean can cost around £300–£650, averaging approximately £475 according to current 2026 UK pricing data.
If you only want the roof cleaned, some specialists price by panel. Current estimates put conservatory roof cleaning at around £10.50–£13.50 per panel, or approximately £12 per panel on average.
As a practical guide:
| Conservatory cleaning service | Typical 2026 UK cost |
|---|---|
| Exterior-only clean | £125–£195 |
| Exterior clean average | Around £160 |
| Roof-only cleaning | Around £70–£120 for many smaller jobs |
| Roof cleaning by panel | £10.50–£13.50 per panel |
| Interior and exterior clean | £300–£650 |
| Full clean average | Around £475 |
| Full valet / heavily soiled conservatory | £500–£650+ |
These prices are only a guide. The amount you actually pay depends heavily on the conservatory’s size, roof design, accessibility and how thorough the clean needs to be.
What Does Conservatory Cleaning Actually Include?
Not every conservatory cleaning service means the same thing.
At the lower end, you may simply be paying to have the exterior glass, frames and roof washed.
At the other end, a full conservatory valet can involve several hours of detailed work both inside and outside the structure.
A typical professional service might include:
- exterior glass;
- conservatory roof panels;
- window frames;
- doors;
- uPVC framework;
- sills;
- roof finials and cresting where accessible;
- gutters and channels;
- internal glass;
- internal frames;
- flooring and surfaces.
More comprehensive services may also include specialist uPVC restoration products, water-repellent treatments for glass and cleaning or lubricating door locks, hinges and handles.
Checkatrade’s current 2026 pricing guide describes full-valet packages that can include gutter clearing, specialist uPVC stain removal and treatment of locks and hinges, although individual cleaners structure their packages differently.
That means you should never compare two quotations purely by price.
A £150 conservatory clean and a £450 conservatory clean may be completely different jobs.
How Much Does Exterior Conservatory Cleaning Cost?
For a straightforward outside-only conservatory clean, expect approximately £125–£195, with around £160 currently given as a typical UK average.
Exterior cleaning usually focuses on the areas most exposed to weather:
- external glass;
- frames;
- doors;
- roof panels;
- exterior sills;
- accessible roof structure.
A small lean-to conservatory with straightforward access may sit close to the lower end.
A larger Victorian or Edwardian conservatory with more glazing, a complicated roof design and difficult side access is likely to cost more.
External cleaning can make a surprisingly large visual difference, particularly where the frames have gradually become grey or green.
How Much Does It Cost to Clean a Conservatory Roof?
The conservatory roof is often the part homeowners most want cleaned.
Because it is constantly exposed to rain, leaves, pollen and bird mess, it can quickly develop green algae and streaking.
Current 2026 pricing suggests around £12 per roof panel, with a broader range of roughly £10.50–£13.50 per panel.
Another current UK cost guide puts many complete conservatory roof cleaning jobs at approximately £70–£120, depending on the conservatory’s size and accessibility.
So if your conservatory has 12 roof panels and the cleaner charges £12 per panel:
12 × £12 = £144
For a smaller eight-panel roof:
8 × £12 = £96
In reality, companies may apply minimum charges rather than strictly calculating every job by panel count.
Accessibility can also alter the price significantly.
How Much Does It Cost to Clean a Conservatory Inside and Out?
A full internal and external clean is considerably more expensive.
Current 2026 estimates range from approximately £300 to £650, with around £475 given as an average.
The price increase makes sense when you consider how much extra work is involved.
An external cleaner may be concentrating primarily on glass, frames and roof panels.
A full internal clean can additionally involve:
- internal glass;
- window frames and sills;
- doors;
- flooring;
- internal roof areas where accessible;
- detailed framework cleaning;
- conservatory furniture or surrounding surfaces where agreed.
A thorough inside-and-out clean can take around four to five hours, according to current industry guidance.
For homeowners wanting to restore a conservatory that has been neglected for several years, this is closer to a specialist deep-cleaning service than ordinary window cleaning.
Why Can Conservatory Cleaning Cost So Much?
It is easy to look at a conservatory and think:
“Surely it’s just windows?”
The roof changes everything.
Ordinary ground-floor windows are relatively easy to access.
A conservatory roof consists of multiple elevated glass or polycarbonate panels, often separated by framework where dirt, algae and debris accumulate.
The cleaner may require:
- water-fed poles;
- specialist brushes;
- purified-water systems;
- ladders or access equipment where appropriate;
- specialist cleaning products;
- considerably more time than normal window cleaning.
There is also far more frame area than on a typical window.
If you’re mainly interested in having the glass cleaned and your conservatory does not need specialist roof or frame restoration, compare the cost with our guide to window cleaning prices in the UK.
Sometimes adding conservatory windows to an existing window-cleaning visit will be much cheaper than booking a full specialist conservatory clean.
What Affects the Price?
Conservatory size
Unsurprisingly, larger conservatories cost more.
A compact three-sided lean-to will generally require much less labour than a large Victorian-style conservatory wrapping around part of the property.
More glazing means:
- more roof panels;
- more windows;
- more framework;
- longer cleaning time.
Roof shape
A simple sloping lean-to roof is relatively straightforward.
More complex roof designs can have multiple slopes, ridges, decorative sections and awkward areas around finials or valleys.
That increases both cleaning time and access difficulty.
Glass vs polycarbonate roof
The material itself does not automatically create a huge price difference, but it can affect the appropriate cleaning method.
Older polycarbonate roofing can be particularly susceptible to scratching or damage if incorrect products or excessive pressure are used.
The cleaner should therefore understand what they are working on before beginning.
Condition of the conservatory
A conservatory cleaned every year is much easier to maintain than one that has not been touched for five years.
Light dirt and rainfall marks can usually be removed fairly quickly.
Established green algae, moss, organic staining and deeply discoloured uPVC can require far more work.
Access
Access can completely change a quotation.
A conservatory in an open garden with clear access around all sides is easier to clean than one built close to:
- a neighbour’s fence;
- a wall;
- a garage;
- dense planting;
- a steep slope.
The cleaner must be able to work safely as well as reach the panels.
Where you live
As with most home services, prices vary regionally.
Current UK estimates note that labour costs tend to be higher in southern England and particularly London.
Parking, congestion charges and longer travel distances can sometimes affect the final quotation too.
Conservatory Roof Cleaning and Gutters
Conservatories have their own guttering systems, and these can fill with leaves, moss and other debris just like the gutters on the main house.
That becomes particularly common when a conservatory sits beneath trees.
Some premium conservatory cleaning packages include gutter clearing.
Others do not.
Ask specifically because cleaning the visible outside of a gutter is not the same thing as clearing debris from inside it.
If the main house gutters also need attention, combining the work may make sense. Our guide to gutter cleaning costs in the UK explains typical pricing and the factors that make gutter work more expensive.
Having the roof and gutters dealt with at the same time can also prevent freshly cleaned roof panels immediately draining through blocked channels.
Can You Pressure Wash a Conservatory?
Using a powerful pressure washer on conservatory roofing is generally not recommended.
High-pressure water can potentially damage seals, coatings and other components.
Current professional guidance instead recommends gentler methods such as warm water, mild detergent, soft brushes and telescopic cleaning poles.
This is especially important on older conservatories.
A powerful pressure washer can force water into places ordinary rainfall would never reach.
That potentially turns a cleaning job into a leak investigation.
Some specialists use professional low-pressure systems designed for delicate exterior cleaning, but that is very different from standing in the garden with a domestic pressure washer at maximum power.
Can I Clean My Conservatory Roof Myself?
Potentially, particularly if the conservatory is small and you can reach the panels safely from ground level using an extendable cleaning pole.
A simple DIY approach generally involves:
- removing loose debris;
- using warm water and mild detergent;
- working with a soft-bristled telescopic brush;
- rinsing the panels thoroughly;
- allowing them to dry naturally.
You should avoid abrasive brushes and harsh chemicals unless the conservatory manufacturer confirms they are appropriate.
Most importantly, do not climb onto the conservatory roof.
Glass and polycarbonate panels are not designed to support a person’s weight.
Working at height also introduces obvious safety risks.
Professional cleaning becomes particularly worthwhile when the roof cannot be safely reached from ground level.
What About Green Algae on a Conservatory Roof?
Green conservatory roofs are extremely common.
The colour usually comes from algae and other organic growth that accumulates in damp or shaded conditions.
Conservatories beneath trees or those receiving little direct sunlight can develop it particularly quickly.
Regular cleaning helps prevent heavy accumulation.
For light growth, mild detergent and a suitable soft brush may be enough.
More stubborn algae may require a specialist cleaning product compatible with the roof material.
The important point is to avoid trying to compensate for stubborn growth by using excessively aggressive tools.
Scratches in polycarbonate or damage around seals are far more expensive to fix than the cleaning itself.
How Often Should a Conservatory Be Cleaned?
For many properties, one thorough professional clean each year plus a lighter clean in between is a sensible starting point.
That is also the frequency currently suggested by Checkatrade.
Your conservatory might need attention more often if it:
- sits directly beneath trees;
- faces a particularly exposed direction;
- attracts a lot of bird activity;
- develops algae rapidly;
- is close to a busy road;
- remains damp or shaded.
Cleaning frequency does not necessarily need to mean paying £400–£500 every six months.
You could arrange a full clean annually while having the glass and exterior maintained more cheaply during normal window-cleaning visits.
Is Conservatory Cleaning Worth the Money?
That depends partly on what condition the conservatory is in.
Paying £160 for exterior cleaning can make sense when the structure is fundamentally in good condition but looks tired because of dirt and algae.
Spending £500–£650 on a full valet makes more sense when:
- the conservatory has been neglected;
- internal and external glass both need work;
- uPVC is heavily discoloured;
- gutters require clearing;
- the property is being prepared for sale;
- you want to restore the entire structure rather than simply wash the windows.
It is worth remembering how expensive conservatories themselves are.
If you’re considering adding or replacing one, our full guide to how much a conservatory costs in the UK explains current installation prices.
Against the cost of building or replacing a conservatory, periodically spending money to keep an existing structure clean and well maintained is relatively modest.
Cleaning vs Refurbishing an Old Conservatory
Cleaning cannot fix everything.
A detailed clean may transform:
- dirty glass;
- green algae;
- stained frames;
- clogged external channels;
- surface discolouration.
It cannot repair:
- failed glazing units;
- cracked polycarbonate;
- leaking seals;
- rotten components;
- damaged frames;
- structurally failing roof sections.
If the conservatory still looks poor after cleaning because the materials themselves have deteriorated, further spending on increasingly intensive cleaning is unlikely to solve the problem.
Current conservatory refurbishment prices run into thousands of pounds, with roof replacement and larger renovation work costing far more than routine cleaning.
That is why diagnosing whether something is dirty or actually damaged matters.
How to Get a Fair Conservatory Cleaning Quote
Try to give the cleaner enough information to quote accurately.
Instead of asking:
“How much to clean my conservatory?”
tell them:
- approximate dimensions;
- conservatory style if known;
- roof material;
- approximate number of roof panels;
- whether you want outside only or inside and outside;
- whether gutters need clearing;
- whether there is green algae or heavy staining;
- whether all sides are accessible.
Photographs can be extremely helpful.
A cleaner may be able to identify difficult access or heavy algae immediately and give you a more reliable price before travelling to the property.
Questions to Ask Before Booking
Before agreeing to the work, establish exactly what your quotation includes.
Ask:
Is the roof included?
Are all external frames included?
Do you clean inside as well as outside?
Are conservatory gutters cleared or only wiped externally?
Is uPVC restoration included?
Are specialist stain treatments extra?
Do you use pressure washing or low-pressure/manual cleaning?
Do I need to move conservatory furniture?
Are access equipment and cleaning products included?
Is the quoted figure the complete price?
Getting those answers beforehand prevents disagreements about what “full conservatory cleaning” actually means.
How to Save Money on Conservatory Cleaning
Combine it with window cleaning
If you already have a regular window cleaner, ask whether they can clean the external conservatory glass and accessible roof.
For a relatively clean conservatory, this may be significantly cheaper than booking a specialist full valet.
Have it cleaned before it becomes heavily soiled
Waiting until the roof is completely covered in algae often creates a more difficult job.
Regular maintenance generally requires less labour than restoration.
Clear access beforehand
Move garden furniture, plant pots and other obstacles away from the structure.
That allows the cleaner to begin immediately rather than spending paid time creating working space.
Bundle related work
If the conservatory gutters and main house gutters both need clearing, request a combined quotation.
The same applies to windows.
A company already travelling to your property may price additional work more favourably than several separate appointments.
Frequently Asked Questions
How much does it cost to clean a conservatory in the UK?
Exterior-only conservatory cleaning currently costs approximately £125–£195, with around £160 as a UK average.
A full internal and external clean can cost roughly £300–£650, averaging about £475.
How much does conservatory roof cleaning cost?
Current 2026 figures put conservatory roof cleaning at approximately £10.50–£13.50 per panel, averaging around £12 per panel.
Some whole-roof cleaning services fall around £70–£120, particularly for smaller conservatories with straightforward access.
How long does it take to clean a conservatory?
A comprehensive inside-and-out conservatory clean may take around four to five hours.
Exterior-only or roof-only jobs should generally be quicker.
Can a window cleaner clean a conservatory roof?
Some can.
Many professional window cleaners use water-fed pole systems capable of reaching conservatory roof panels safely from the ground.
However, specialist algae removal, detailed uPVC restoration or complicated roof access may require a dedicated conservatory cleaning service.
Can you use a pressure washer on a conservatory roof?
High-pressure washing is generally not recommended because it can damage seals, coatings and potentially the roofing material itself.
Gentler low-pressure methods, soft brushes and telescopic poles are normally safer.
How often should I have my conservatory cleaned?
One thorough clean each year with a lighter maintenance clean between is a reasonable guideline for many properties.
Conservatories beneath trees or in shaded areas may require more frequent cleaning.
Is gutter cleaning included with conservatory cleaning?
Sometimes, but never assume it is.
Some full-valet packages include conservatory gutter clearing, while basic exterior cleaning may only wash the visible gutter surfaces.
Is professional conservatory cleaning worth it?
It can be particularly worthwhile where the roof is difficult to access safely or the structure has significant algae, frame staining or dirt accumulation.
For a lightly soiled and easily accessible conservatory, regular window cleaning and occasional DIY maintenance may be sufficient.
So, How Much Should You Budget?
For a professional conservatory clean in the UK in 2026, a useful starting budget is:
£125–£195 for exterior cleaning
Around £70–£120 for many roof-only jobs
Around £10.50–£13.50 per roof panel where priced individually
£300–£650 for a detailed interior and exterior clean
A small, accessible conservatory needing little more than a wash can therefore cost relatively little.
A large conservatory requiring roof cleaning, internal glass, uPVC restoration, gutter clearing and several hours of detailed work can easily move towards £500–£650 or more.
Before accepting a quotation, make sure you know exactly what is included. Particularly check whether the roof, interior glass, gutters and uPVC restoration are part of the price rather than assuming that “conservatory cleaning” covers everything.
If you would rather bring in professional help, The Right Guy can help you discover local cleaning and property-maintenance professionals operating in your area. Describe the conservatory size, roof type and level of cleaning required when making an enquiry so businesses can provide a more meaningful quotation.
Author: The Right Guy Team
UK service guides published by The Right Guy Ltd.