Solar panels in Sittingbourne: semis, terraces and a wide-open southern sky

Last reviewed: 29 October 2026. Figures are estimates unless stated; method and sources are given beside each one.

Two in three Sittingbourne homes are either semi-detached or terraced. Across seven town wards, 35.7% of households live in a semi and 32.7% in a terrace, while only 16% live in a detached house (Census 2021). For most people here the real question is how many panels fit on one half of a shared roof, and which slope to use.

The roof you probably have

Census 2021 tables TS044 and TS054; ward figures added together by us.

On a semi, the rear slope is usually the larger usable face; a hipped roof loses area at the corners. On a terrace, each house has a narrow strip, so the panel count depends on the width between party walls, roof windows and any rear outrigger. A 3 kWp array (about seven or eight panels of around 400 W) often fits a semi's rear slope; a mid-terrace may manage 2 to 3 kWp.

Output for the town

The modelled point is 21 m above sea level and the skyline is very low: PVGIS gives no more than 1.1° of terrain horizon in any direction. That helps winter output.

• South: about 1,048 kWh per kWp a year, so a 3 kWp array gives about 3,140 kWh.
• South-west: about 989; south-east: about 983.
• West: about 832; east: about 826.
• North: about 555 (rarely worth it).

Method: we queried the PVGIS v5.3 PVcalc service for a roof-mounted 1 kWp array (35° pitch, 14% loss, horizon on, SARAH3) at the town's map point. Scale by system size; nearby trees and chimneys are not modelled.

Sittingbourne's south-facing figure is a little above the other Mid Kent towns we modelled, such as Maidstone at 1,024 and Rochester at 1,018. In practice, your roof's direction and any shading from neighbouring houses matter far more than that difference.

If your rear slope faces north, look at the front slope (if it is outside a conservation area) or an east-west split. Two 1.5 kWp arrays facing east and west give about 2,490 kWh a year in total.

What it might cost

• 2.5 kWp (mid-terrace): about £4,600
• 3 kWp (rear slope of a semi): about £5,600
• 4 kWp (semi with a usable side slope as well): about £7,400

These are budgeting estimates, not prices: kWp × the DESNZ South East mean for 2025/26 (£1,858.90/kW for 0-4 kW, £1,721.49/kW for 4-10 kW), rounded to the nearest £100, with no storage.

The 0% VAT rate on solar and batteries for homes lasts until 31 March 2027 (HMRC). A battery adds roughly £1,500 to £10,000 depending on size, according to the Energy Saving Trust. Our battery calculator helps you size one.

Conservation areas in Sittingbourne and Milton Regis

Swale Borough Council's conservation area page covers two that matter in the town:

• Sittingbourne, first designated on 12 December 1969, with a character appraisal and management plan adopted in November 2021. The council lists it as at risk.
• Milton Regis High Street, with a draft character appraisal from November 2023. Also listed as at risk.

What the national rules say (GPDO Part 14, Class A, as amended by SI 2026/896 from 27 August 2026): in a conservation area, panels on a wall, balcony or roof enclosure fronting a highway are not permitted development. Elsewhere on a house, pitched-roof panels must stay within 0.2 m of the slope and below the ridge, and panels on a wall, balcony or roof enclosure may project up to 0.4 m, or 0.2 m where it abuts a highway. Listed buildings are excluded.

On the High Street and in Milton Regis, panels on the rear roof slope are the usual starting point. Swale's Article 4 directions page lists the directions in force across the borough; check your street before work begins. A lawful development certificate gives written proof that a project is permitted development.

South of the town, the countryside towards Bredgar is in the Kent Downs National Landscape. Rooftop Class A rules for houses do not name National Landscapes, but stand-alone garden arrays have extra limits there (Class B).

Grid connection and export

A 3 kWp system is within G98 on a single-phase supply, so UK Power Networks is notified after fitting. Above 16 A per phase, the installer applies first under G99. Register for a Smart Export Guarantee tariff to be paid for exported power.

Comparing installers in Sittingbourne

Use the directory to see which businesses work in your area, or send one request through our quote form. Ask each firm for a roof plan, an output estimate, the inverter make and who files the grid notification.

Other Swale and Mid Kent guides

• Sheerness on the Isle of Sheppey · Faversham to the east
• Maidstone to the south-west
• Try the panel packer to see how many panels fit a narrow slope.