Is there enough sun in Chesham for a commercial roof array?

Modelled at 891 kWh per kWp a year for a low-tilt array at this latitude, a 210 kWp system comes out at roughly 187,000 kWh a year before shading. It needs about 1,390 m² of flat roof once the edge strip, plant and walkways are kept clear. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Do we need planning permission for solar on a commercial building in Buckinghamshire?

Usually not a full application. In England, panels on the roof of a non-domestic building are permitted development under Class J of Part 14 of the General Permitted Development Order, with no capacity cap since December 2023. Above 50 kW, which covers most commercial arrays, you must first apply to Buckinghamshire for a determination on prior approval of the design and appearance, in particular glare on neighbouring land. On a flat roof panels may stand no more than 1 metre above the roof and must sit at least 1 metre from its edge, and listed buildings and scheduled monuments are excluded. See our planning permission guide for the detail.

Does solar help a Chesham landlord meet MEES?

It can. A non-domestic EPC is an asset rating, and on-site generation counts in the calculation, so an array usually lifts the score. Let property in England and Wales must be EPC E or better today. The government's interim response of 18 June 2026 proposes EPC B, where cost effective, from 2031 for let buildings over 1,000 m², and drops the EPC C step once planned for 2027. How far solar moves a particular building depends on its fabric and services, which is why the EPC assessor models it before anything is fitted.

Which network operator handles the connection in Chesham?

Capacity varies street by street and only Scottish and Southern Electricity Networks can answer it for your connection. We ask early, because an export-limited offer changes the design rather than ending the scheme, and most commercial buildings use most of what they generate anyway.

Commercial building solar panels in Chesham

An office or store in Chesham buys most of its electricity between eight in the morning and six at night, which is when a roof array generates. What decides a scheme is the roof covering, the parapet height and the plant layout, which is why the survey happens on the roof rather than from a satellite image.

891 kWh per kWp a year at this latitude, so a 210 kWp array models at about 187,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

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Drawing Chesham commercial roof

Roof 60 x 32 m, 1,920 m²

Array 210 kWp, east-west

Yield 187,000 kWh/yr

Scale 1:400 / Rev A / HP5

Illustrative layout for a flat commercial roof of this size, with plant, shade and access kept clear. Your own figures come from the roof survey.

23,695: people in the Chesham built-up area (ONS Census 2021)
3,620: office properties on the rating list in Buckinghamshire (VOA, March 2025)
3,310: retail properties, 130 of them large-format (VOA, March 2025)
0: named commercial rooftop schemes on the planning record nearby (REPD, Q1 2026)

The commercial edge of a Home Counties town, offices and a retail park with solar on several roofs — Commercial stock of the kind we survey across South East. Generated illustration, not a named site.

Solar for offices and retail across Buckinghamshire

How much sun a Chesham roof gets

Modelled irradiation here is 1,142 kWh per square metre a year on a low-tilt array, which works out at 891 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is within a few percent of the mean across the towns we cover, so the weather is not what decides the case here. Opening hours are.

The rating list for Buckinghamshire

The Valuation Office Agency's rating list puts 3,620 office and 3,310 retail properties in Buckinghamshire, covering about 637,000 and 678,000 square metres of floorspace respectively. By office stock the district sits in the top tenth of the 318 districts in England and Wales; by retail stock it sits in the top tenth of the 318 districts in England and Wales.

The big roofs are in the 130 large-format retail units, superstores and retail warehouses in the district, about 327,000 square metres of floorspace under largely single storey roofs.

The same list carries 840 hotel, leisure and assembly properties in the district. Leisure centres and hotels run seven days a week, which puts weekend generation to use that an office would export.

Source: Valuation Office Agency, Non-domestic rating: business floorspace, 31 March 2025 (published December 2025), counts and floorspace by special category code and local authority district, England and Wales.

The built-up area holds about 23,695 people, so the stock here runs to high street premises, a supermarket or two and the odd hotel (ONS Census 2021 built-up areas).

We arrange surveys across the HP postcode area, starting from HP5.

FIG. 1 What a Chesham roof makes, month by month

Jul produces 5.9 times what Dec does on the same roof. A 210 kWp array here models at about 187,000 kWh across the year, but it arrives unevenly, which is why we size against your summer daytime load and then look at whether storage is worth adding for the shoulder months.

Monthly figures as a table

Month	kWh per kWp	210 kWp array
Jan	24	5,040
Feb	38	7,980
Mar	72	15,120
Apr	103	21,630
May	118	24,780
Jun	123	25,830
Jul	124	26,040
Aug	105	22,050
Sep	82	17,220
Oct	50	10,500
Nov	30	6,300
Dec	21	4,410

Source: EU PVGIS v5.2

FIG. 2 Chesham against the rest of Buckinghamshire

Marlow904
Buckingham893
High Wycombe892
Beaconsfield892
Chesham891
Amersham890
Princes Risborough883
Aylesbury881

Chesham ranks 5 of 8 towns we cover in Buckinghamshire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 881 to 904, a spread of 23 kWh per kWp. Within Buckinghamshire that difference is small enough to ignore: where the building sits is not what decides this scheme, your consumption pattern is.

Bars are zero based, so length is proportional to the figure. Where a county is flat, that is the finding: location is not the lever, consumption is. Source: EU PVGIS v5.2, modelled per town

Grid connection through Scottish and Southern Electricity Networks

Connections around Chesham are handled by Scottish and Southern Electricity Networks, which sets the export limit for the site. Above 3.68 kW per phase the connection runs under G99, so the export limit is agreed in advance rather than assumed. Where the local network is constrained, an export-limited connection usually still makes the scheme work, because a commercial building uses most of what the roof makes during the working day.

Across Buckinghamshire the planning database records 127 solar schemes totalling 955 MW, of which 21 are operational (REPD Q1 2026).

All solar on record near HP5

Every scheme in this postcode district in the government's Renewable Energy Planning Database, Q1 2026, ground and roof mounted, commercial or not. None of them is ours. Together they are a fair guide to how the local network has been treating export applications.

Scheme	Operator	Capacity	Mounting	Status
Bellingdon Brickworks, Chesham Road - Solar Panels	H G Matthews	0.33 MW	Roof	Awaiting Construction

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Send us the postcode

Tell us where the building is, roughly how big the roof is, and whether you own it or lease it. We come back with what it can carry, what it would generate against your consumption, and the three ways to pay for it.

Lenzie Consulting Ltd arranges the survey and passes your details to our MCS-certified installation partner so they can quote.

Your name Company Email Phone Site postcode Building type Your interest in the building Roof area Annual electricity spend What are you looking at?

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We pass your details to our MCS-certified installation partner so they can quote. Read the privacy notice.

Questions about solar in Chesham

Is there enough sun in Chesham for a commercial roof array?: Modelled at 891 kWh per kWp a year for a low-tilt array at this latitude, a 210 kWp system comes out at roughly 187,000 kWh a year before shading. It needs about 1,390 m² of flat roof once the edge strip, plant and walkways are kept clear. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Do we need planning permission for solar on a commercial building in Buckinghamshire?: Usually not a full application. In England, panels on the roof of a non-domestic building are permitted development under Class J of Part 14 of the General Permitted Development Order, with no capacity cap since December 2023. Above 50 kW, which covers most commercial arrays, you must first apply to Buckinghamshire for a determination on prior approval of the design and appearance, in particular glare on neighbouring land. On a flat roof panels may stand no more than 1 metre above the roof and must sit at least 1 metre from its edge, and listed buildings and scheduled monuments are excluded. See our planning permission guide for the detail.
Does solar help a Chesham landlord meet MEES?: It can. A non-domestic EPC is an asset rating, and on-site generation counts in the calculation, so an array usually lifts the score. Let property in England and Wales must be EPC E or better today. The government's interim response of 18 June 2026 proposes EPC B, where cost effective, from 2031 for let buildings over 1,000 m², and drops the EPC C step once planned for 2027. How far solar moves a particular building depends on its fabric and services, which is why the EPC assessor models it before anything is fitted.
Which network operator handles the connection in Chesham?: Capacity varies street by street and only Scottish and Southern Electricity Networks can answer it for your connection. We ask early, because an export-limited offer changes the design rather than ending the scheme, and most commercial buildings use most of what they generate anyway.

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