Guildford is the one place on our patch where the grid paperwork goes somewhere different: your distribution network operator is UK Power Networks, not SSEN. It also has the lowest solar yield of the eleven towns we cover — and, by some distance, the best roofs to put panels on. Two-thirds of Guildford homes are detached or semi-detached.
A south-facing Guildford roof at around 35° generates roughly 1,023 kWh per year for every kWp installed — about 4,094 kWh from a 4 kWp array. That is the lowest of the eleven towns we cover, around 13% behind Chichester. Guildford is further inland, further north, and in wooded country.
We'd rather tell you that than quote a south-coast average. But it is only half the picture, and the other half is better.
The council's own housing assessment puts Guildford at 33% detached and 33% semi-detached — notably higher than Surrey or England overall — with just 14% terraced and 19% flats. Two-thirds of the town's homes have the kind of roof that supports a genuinely large array. A 6 kWp system on a Guildford detached house comfortably out-produces a 4 kWp system on a Portsmouth terrace, lower yield per kWp or not.
| Town | kWh per kWp / year |
|---|---|
| Chichester | 1,175 |
| Portsmouth | 1,124 |
| Fareham | 1,117 |
| Bournemouth | 1,100 |
| Poole | 1,097 |
| Southampton | 1,080 |
| Salisbury | 1,046 |
| Winchester | 1,038 |
| Andover | 1,037 |
| Basingstoke | 1,031 |
| Guildford | 1,023 |
Source: European Commission PVGIS (v5.2), south-facing, 35° pitch, 14% system losses. Your own figure will differ with shading, pitch, orientation and roof area — the survey gives you a property-specific number, not this one.
This is the detail most installers coming up from Hampshire get wrong. Every other town we cover — Southampton, Portsmouth, Winchester, Fareham, Basingstoke, Andover, Salisbury, Bournemouth, Poole, even Chichester over in West Sussex — sits in SSEN's SEPD area. Guildford is UK Power Networks, South East.
Guildford is the mirror image of Chichester. Chichester has a genuine second planning authority covering two-thirds of its district. Guildford, despite the Surrey Hills, has none — Guildford Borough Council decides everything.
Guildford town, Onslow Village, Merrow, Burpham, Shalford, Shere, Ripley, Albury, Compton and Worplesdon. Every installation is MCS accredited.
Aiko ABC panels. Guildford's yield per kWp is the lowest we see, which makes array size the lever that matters — and with two-thirds of homes detached or semi-detached, the roof area is usually there. Shading from Surrey's mature tree cover is the real design problem, and optimisers or micro-inverters often earn their place here.
Solar panels →Grant, Midea and Daikin. Detached and semi-detached stock is the easiest we work with: space for an outdoor unit, room for a cylinder, and boundary distances that actually work. We still calculate heat loss room by room rather than assuming a large house is a straightforward one.
Heat pumps →Tesla Powerwall 3, Fox ESS and SigenEnergy. With a lower yield and larger houses, Guildford properties often consume more than the roof makes — which shifts the case toward overnight tariff arbitrage as much as solar storage.
Battery storage →UK Power Networks, South East — not SSEN. This is the detail most installers coming up from Hampshire get wrong. Every other town we cover, including Chichester over in West Sussex, sits in SSEN's SEPD area, but the licence boundary cuts through Surrey rather than following the county line. It matters because a G99 application submitted to the wrong network operator is not quietly forwarded; it is rejected, and you lose the weeks. We confirm the operator by postcode before anything is submitted.
About 1,023 kWh per year for every kWp installed, on a south-facing roof pitched at around 35 degrees, according to the European Commission's PVGIS dataset — roughly 4,094 kWh from a 4 kWp array. That is the lowest of the eleven towns we cover, around 13% behind Chichester, because Guildford is further inland, further north and in wooded country. We would rather tell you that than quote you a south-coast average.
Usually yes, because roof area more than compensates. The council's own housing assessment puts Guildford at 33% detached and 33% semi-detached — notably higher than Surrey or England overall — with only 14% terraced and 19% flats. Two-thirds of homes here have roofs that support a genuinely large array. A 6 kWp system on a Guildford detached house comfortably out-produces a 4 kWp system on a Portsmouth terrace, whatever the figure per kWp says. Total output is what pays your bills.
Less than people expect, and not in the way it does in the South Downs. Unlike the South Downs, the Surrey Hills has no planning authority of its own — Guildford Borough Council decides all applications in the borough, working with Surrey County Council and neighbouring boroughs only on the Management Plan. National Landscape status also does not by itself remove permitted development rights for roof solar. Conservation area status, a listing or a scheduled monument does.
Approximately 89% of the borough is Metropolitan Green Belt, according to the adopted Local Plan, and that is the dominant planning constraint here — far more so than the National Landscape. It bears heavily on ground-mounted arrays and new outbuildings. It bears much less on panels fitted to an existing roof or a heat pump unit sited against the house, which is what most householder projects involve.
Inside one, panels on a wall or roof slope that forms the principal elevation and fronts a highway need planning permission from Guildford Borough Council. There are around 40 conservation areas in the borough — the council's heritage document says 40, the 2019 Local Plan says 38 — covering much of the town centre and many villages, including Guildford Town Centre, Charlotteville and Warren Road, Onslow Village, St Catherines, Shere, Ripley, Albury and Compton. The borough also has around 1,200 listed buildings, which need listed building consent separately.
Required to claim the BUS grant and to register for the Smart Export Guarantee. We are also RECC members.
Not SSEN. We check the network operator by postcode before submitting anything.
Family-run, with directly employed engineers. The people who survey your property are the people who install.
Survey to sign-off in one price, including scaffolding and the grid application. No hidden extras.
We will confirm your network operator, check your conservation area and Green Belt position, and size an array to the roof you actually have.
Book a Free Survey →