A new insulated conservatory roof in Harrow costs from £3,000 on a compact lean-to, while a typical spend is £3,000 to £7,500. With Harrow's weather, replacing a 12 m² polycarbonate roof with our 75 mm panels holds on to roughly 952 kWh of heat a year, about £251 if you warm the room with an electric heater.
Every winter a Harrow conservatory racks up about 1,768 heating degree days, which is the yardstick heating engineers use for how hard a room has to be heated. Under a thin roof, most of that effort goes straight up.
The Harrow climate, in four numbers
We took these averages for 2021 to 2025 from Open-Meteo's historical weather records for Harrow. The warmest day in that spell hit 37.6°C on 19 July 2022. Inside a conservatory with a clear roof the air gets much hotter than that, so the room is too warm in July as well as too cold in January.
How much heat a new roof keeps in Harrow
To get yearly heat loss we multiply three numbers: the roof's U-value, its area in square metres and the local degree days. Below are the results for an average 12 m² roof in Harrow:
Worked out from Harrow's 1,768 heating degree days (Open-Meteo, 2021 to 2025) and typical U-values.
| Roof type | U-value | kWh lost a year | Electric heater | Gas boiler |
|---|---|---|---|---|
| 16 mm polycarbonate | 2.3 | 1,171 kWh | £308 | £104 |
| Eco Tech 75 mm panels | 0.43 | 219 kWh | £58 | £19 |
| Difference | 952 kWh | £251 a year | £84 a year |
Energy costs use the Ofgem cap for 1 October to 31 December 2026. If the conservatory is never heated, the gain shows up as comfort rather than a lower bill: the room simply stays nearer to the rest of the house. Put in your own measurements with our roof price and heat loss calculator and choose Harrow from the town list.
Eco Tech prices for Harrow
We charge the same across the London. What you pay includes taking your old roof away, bespoke panels in the shade you pick, the fitting itself and a 10 year HomePro insurance backed warranty.
| Style | Small (0 to 12 m²) | Medium (12 to 25 m²) | Large (25 m² and over) |
|---|---|---|---|
| Lean-to | £3,000 to £3,550 | £3,950 to £4,700 | £5,450 to £6,450 |
| Edwardian | £3,200 to £3,800 | £4,200 to £4,950 | £5,800 to £6,850 |
| Victorian | £3,300 to £3,900 | £4,350 to £5,150 | £6,000 to £7,100 |
| Gable end | £3,350 to £4,000 | £4,450 to £5,250 | £6,100 to £7,250 |
| P-Shape | £3,500 to £4,150 | £4,600 to £5,450 | £6,300 to £7,500 |
Our roof panel price guide explains what moves the figure up or down, and the insulated roof panel page shows how each panel is built.
What happens after you call us
- Photos and a survey. Send us a few photos and rough sizes, then a surveyor visits your Harrow home to measure up, check the frame and bars, and show you colours and roof lights.
- A price in writing. You receive a fixed written quote. Finance through Kanda is available, subject to status.
- Fitting day. Our team removes the old roof and fits the panels, usually in one day, keeping the room covered and tidy throughout.
- Warranty. Your 10 year HomePro insurance backed warranty is registered once the roof is finished.
Harrow questions, answered
What does a new conservatory roof cost in Harrow?
Most of our Harrow customers pay between £3,000 and £7,500. A medium Edwardian of around 17 m² usually comes to £4,200 to £4,950 with the old roof removed, the panels fitted and the 10 year HomePro warranty included. Your survey fixes the price in writing.
How much heat escapes through a conservatory roof in Harrow?
On 1,768 degree days a year, a heated 12 m² roof in 16 mm polycarbonate loses around 1,171 kWh. Put 75 mm Eco Tech panels on the same frame and that drops to about 219 kWh.
Will I need planning permission in Harrow?
Normally no, because the conservatory keeps its footprint and height. Listed homes, conservation areas and properties with permitted development rights removed should check with the council before work starts.
How quickly can Eco Tech fit a roof in Harrow?
Our surveyors cover Harrow as part of regular visits to London. Most roofs go on a few weeks after the survey, and a typical roof is finished in one day.