# Solar Support and Planning Rules

> The Solar Support and Planning Rules carries 2 published figures read from 1 source's own page, from 5 to 60 percent, read 17 October 2026.

Roofing Quotes UK · https://roofingquotesuk.com/datasets/solar-support-and-planning-rules/ · computed 2026-10-19

**Range of the published figures:** 5 to 60 % (range 5 to 60 %; 2 published figures; 2 of 7 sources read publish one).

2 of the 7 named sources read in full publish a figure; 5 publish none, read 17 October 2026.

## By instrument

| Breakdown | Median | Range | Sources |
|---|---|---|---|
| instrument VAT reduced rate on energy-saving materials | 5 % | 5 to 5 % | 1 |
| instrument VAT 60% test | 60 % | 60 to 60 % | 1 |
| instrument GPDO Part 14 site display notice | 21 day | 21 to 21 day | 1 |
| instrument GPDO Part 14 prior approval period | 56 day | 56 to 56 day | 1 |
| instrument GPDO Part 14 prior approval completion period | 3 year | 3 to 3 year | 1 |

## Every figure, with its source

One row per source: the figure the source's own page publishes, the page, and the day it was read.

| Source | Figure | Breakdown | Read |
|---|---|---|---|
| [HMRC internal manual VENSAV3210, energy-saving materials](https://www.gov.uk/hmrc-internal-manuals/vat-energy-saving-materials-and-grant-funded-heating-supplies/vensav3210) | 60 % | VAT 60% test | 2026-10-17 |
| [Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2 Part 14](https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/14) | 56 day | GPDO Part 14 prior approval period | 2026-10-17 |
| [Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2 Part 14](https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/14) | 21 day | GPDO Part 14 site display notice | 2026-10-17 |
| [HMRC internal manual VENSAV3210, energy-saving materials](https://www.gov.uk/hmrc-internal-manuals/vat-energy-saving-materials-and-grant-funded-heating-supplies/vensav3210) | 5 % | VAT reduced rate on energy-saving materials | 2026-10-17 |
| [Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2 Part 14](https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/14) | 3 year | GPDO Part 14 prior approval completion period | 2026-10-17 |

## The sentence each figure was read from (5)

- [HMRC internal manual VENSAV3210, energy-saving materials](https://www.gov.uk/hmrc-internal-manuals/vat-energy-saving-materials-and-grant-funded-heating-supplies/vensav3210), read 2026-10-17: "Therefore, there is a single supply of the installation of energy-saving materials which qualifies for relief either at the reduced rate (subject to the 60% test) or at the zero rate"
- [Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2 Part 14](https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/14), read 2026-10-17: "the expiry of 56 days following the date on which the application under sub-paragraph (3) was received by the local planning authority without the authority notifying the applicant as to whether prior approval is given or refused."
- [Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2 Part 14](https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/14), read 2026-10-17: "by site display in at least one place on or near the land to which the application relates for not less than 21 days of a notice which—"
- [HMRC internal manual VENSAV3210, energy-saving materials](https://www.gov.uk/hmrc-internal-manuals/vat-energy-saving-materials-and-grant-funded-heating-supplies/vensav3210), read 2026-10-17: "Outcome 1: single supply of energy-saving materials eligible for relief (whether supplied at the reduced rate of 5% or temporary zero rate in Great Britain between 1 April 2022 to 31 March 2027)."
- [Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2 Part 14](https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/14), read 2026-10-17: "(5) Development must be completed within a period of 3 years starting with the date on which—"

## Read in full, publishes no figure

- [Ofgem, Smart Export Guarantee (SEG)](https://www.ofgem.gov.uk/environmental-and-social-schemes/smart-export-guarantee-seg), read 2026-09-18: read in full and no accepted figure on the page
- [Ofgem, SEG electricity suppliers](https://www.ofgem.gov.uk/environmental-and-social-schemes/smart-export-guarantee-seg/smart-export-guarantee-seg-electricity-suppliers), read 2026-09-18: read in full and no accepted figure on the page
- [GOV.UK, Solar photovoltaics deployment (statistics)](https://www.gov.uk/government/statistics/solar-photovoltaics-deployment), read 2026-10-10: read in full and no accepted figure on the page
- [MCS Data Dashboard](https://mcscertified.com/low-carbon-landscapes/mcs-data-dashboard/), read 2026-09-11: read in full and no accepted figure on the page
- [MCS Standards and Tools Library](https://mcscertified.com/standards-tools-library/), read 2026-10-03: read in full and no accepted figure on the page

## Methodology

Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2). 2 of the 7 named sources that could be read published a usable figure; 5 published none and are recorded as not published, never filled in; 0 could not be read (blocked, dead or unreachable) and count nowhere. The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source for each breakdown it prices, in % (a source's median where its page yielded several accepted sentences for one breakdown), so a page that gives figures for several breakdowns gives one for each and N counts 2 figures, never sentences; 5 candidate sentence(s) were refused by a reviewer with the reason recorded. The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): one row per support instrument per jurisdiction: the Smart Export Guarantee (who must offer it, the rate each licensee publishes, and the rule that it must be above zero), the VAT treatment (zero-rated for residential energy-saving materials to 31 March 2027 then 5%, and - the fact a commercial buyer needs and almost no consumer page states - 20% on a commercial installation), capital allowances and the annual investment allowance, business rates, and the permitted-development boundary for non-domestic solar under GPDO Part 14 Class J with the conditions and the prior-approval period; the derived figure is the WHOLE SUPPORT STACK for a named installation - what it earns, what it saves in tax, and whether it needs permission - which no single authority publishes because it lives in four of them

## Sources

- [Ofgem, Smart Export Guarantee (SEG)](https://www.ofgem.gov.uk/environmental-and-social-schemes/smart-export-guarantee-seg) (the publisher's own terms; quoted for reporting and comment)
- [Ofgem, SEG electricity suppliers](https://www.ofgem.gov.uk/environmental-and-social-schemes/smart-export-guarantee-seg/smart-export-guarantee-seg-electricity-suppliers) (the publisher's own terms; quoted for reporting and comment)
- [HMRC internal manual VENSAV3210, energy-saving materials](https://www.gov.uk/hmrc-internal-manuals/vat-energy-saving-materials-and-grant-funded-heating-supplies/vensav3210) (the publisher's own terms; quoted for reporting and comment)
- [Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2 Part 14](https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/14) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK, Solar photovoltaics deployment (statistics)](https://www.gov.uk/government/statistics/solar-photovoltaics-deployment) (the publisher's own terms; quoted for reporting and comment)
- [MCS Data Dashboard](https://mcscertified.com/low-carbon-landscapes/mcs-data-dashboard/) (the publisher's own terms; quoted for reporting and comment)
- [MCS Standards and Tools Library](https://mcscertified.com/standards-tools-library/) (the publisher's own terms; quoted for reporting and comment)

## Cite or embed

- The Solar Support and Planning Rules carries 2 published figures read from 1 source's own page, from 5 to 60 percent, read 17 October 2026.
- 2 of the 7 named sources read in full publish a figure; 5 publish none, read 17 October 2026.
- Solar Support and Planning Rules, instrument VAT reduced rate on energy-saving materials: median 5 percent across 1 source, read 17 October 2026.
- Solar Support and Planning Rules, instrument VAT 60% test: median 60 percent across 1 source, read 17 October 2026.
- Solar Support and Planning Rules, instrument GPDO Part 14 site display notice: median 21 day across 1 source, read 17 October 2026.
- Solar Support and Planning Rules, instrument GPDO Part 14 prior approval period: median 56 day across 1 source, read 17 October 2026.
- Solar Support and Planning Rules, instrument GPDO Part 14 prior approval completion period: median 3 year across 1 source, read 17 October 2026.

Cite as: "Roofing Quotes UK Solar Support and Planning Rules", updated 2026-10-19, https://roofingquotesuk.com/datasets/solar-support-and-planning-rules/.

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