Conservatory Roof Cleaning Cost UK (2026 Price Guide)
Conservatory roofs are the most-neglected glass on a British house and one of the most satisfying jobs on a round. Here's what a clean costs in 2026, and how to tell a thorough job from a rinse.
Conservatory roof cleaning in the UK typically costs £45–£120 in 2026. A small lean-to roof usually sits at £35–£60, a standard Victorian or Edwardian roof at £60–£95, and a large P-shaped or orangery roof at £100–£180. Adding the frames, finials, gutters and sides usually costs another £25–£60.
Prices by roof type
- Small lean-to (up to ~3m): £35–£60
- Victorian / Edwardian standard: £60–£95
- P-shaped or L-shaped: £90–£150
- Orangery or large glass roof: £100–£180
- Roof + frames + finials + box gutter: add £25–£60
- Interior of roof glass (where accessible): add £40–£90
Polycarbonate vs glass
Polycarbonate roofs green up faster and hold algae in the flutes and joints, so they take longer and are usually the pricier of the two to bring back. Self-cleaning glass still needs washing — the coating reduces build-up, it doesn't remove moss, lichen and gutter run-off.
The gutter where the conservatory meets the house wall is where blockages cause leaks into the room below. Make sure it's included, or you're paying for the visible half of the problem.
How it's cleaned
Most UK cleaners now use a water-fed pole with a soft roof brush and a spreader bar, working from the ground. Nobody should be walking on your roof, and pressure washing is inappropriate on sealed units and polycarbonate joints — it drives water past the seals. For stubborn green growth a soft biocide treatment is applied and left to work, then rinsed.
How often?
Annually is enough for most conservatories. Twice a year is worth it if you're under trees, north-facing, or in a damp shaded garden where algae returns quickly. Regular cleans are always cheaper than a first-clean restoration after five neglected years.
Is it worth paying for?
Two reasons it usually is. First, light: a green roof cuts daylight into the room noticeably, and the difference after a clean is immediate. Second, longevity: standing moss and debris hold moisture against seals and glazing bars, which is exactly what shortens their life. It's cheap maintenance against expensive repair.
For cleaners: quoting conservatories accurately
Under-quoting conservatory roofs is one of the most common ways to lose money on an otherwise good round. Price by roof type and condition rather than a flat rate, add a first-clean uplift for heavy growth, and always list the box gutter as an explicit line so customers understand what they're buying. If you quote online, make conservatory roof a selectable extra so the price adjusts before you ever drive out.
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