Commercial building solar panels in Marlow
Most commercial roofs around Marlow already carry plant, a parapet and an access hatch, and the space between them is where the array goes. Each survey records the usable area once edge strips, plant and walkways are taken out, the load the deck can take, and whether the lease lets the occupier alter the roof.
904 kWh per kWp a year at this latitude, so a 210 kWp array models at about 190,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Book a roof survey in MarlowIllustrative layout for a flat commercial roof of this size, with plant, shade and access kept clear. Your own figures come from the roof survey.
- 14,645
- people in the Marlow 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)
- 1
- named commercial rooftop scheme on the planning record nearby (REPD, Q1 2026)
Commercial rooftop solar across Buckinghamshire
Yield on a Marlow commercial roof
Modelled irradiation here is 1,161 kWh per square metre a year on a low-tilt array, which works out at 904 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.
How many commercial buildings Buckinghamshire has
On the Valuation Office Agency's count, Buckinghamshire holds 3,310 retail and 3,620 office properties on the rating list. 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.
130 of those retail properties are superstores, large food stores, large shops or retail warehouses, together about 327,000 square metres. Single storey boxes of that size are where most commercial rooftop solar actually gets built, because the roof is big, flat or shallow, and uninterrupted.
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.
Commercial rooftop solar already planned near Marlow
The Renewable Energy Planning Database records one roof-mounted scheme on office and business park buildings in this postcode district. These are other organisations' projects, listed from the public record, not ours.
One of them was put through planning by Columbia Threadneedle Investments Limited, an investment manager or landlord rather than the occupier. That is the pattern MEES is pushing towards: the owner fits the array to protect the EPC rating and the letting, then sells the power to the tenant.
| Scheme | Applicant | Type | Capacity | Status |
|---|---|---|---|---|
| Globe Business Park, Fieldhouse Lane | Columbia Threadneedle Investments Limited (landlord) | office | n/a | Awaiting Construction |
The built-up area holds about 14,645 people, so the stock here runs to high street premises, a supermarket or two and the odd hotel (ONS Census 2021 built-up areas).
Surveys run across SL postcodes, SL7 outward.
Marlow ranks 1 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.
All solar on record near SL7
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 |
|---|---|---|---|---|
| Land North of Marlow Landfill Site | Anesco | 5 MW | Ground | Application Refused |
| Globe Business Park, Fieldhouse Lane - PV Panels | Columbia Threadneedle Investments Limited | n/a | Roof | Awaiting Construction |
Grid connection through Scottish and Southern Electricity Networks
Connections around Marlow 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).
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.
Questions about solar in Marlow
- Is there enough sun in Marlow for a commercial roof array?
- Modelled at 904 kWh per kWp a year for a low-tilt array at this latitude, a 210 kWp system comes out at roughly 190,000 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.
- Is planning permission needed for panels on a Marlow office or shop?
- 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.
- Will rooftop solar improve the EPC rating of a let building in Marlow?
- 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.
- Does the grid around Marlow have capacity for export?
- Scottish and Southern Electricity Networks is the distribution network operator for Buckinghamshire. Arrays above 3.68 kW per phase connect under G99, and the application sets the export limit. It is part of the design work we arrange.