Grade II listed Anglican parish church · 25kWp on vestry roof
25 kWp (south-facing vestry roof — unlisted curtilage) commercial solar PV installation with combined grant + tax relief stack delivering 1.4 years (post-grant) post-tax payback on £21,000 gross capex.
Anonymised composite case study
Names, dates and exact financial figures have been changed to preserve client confidentiality. Project structure, funding combinations, technical configuration, and order-of-magnitude figures are real and based on completed work. Full editorial disclosure on the about page.
Project snapshot
| Sector | Faith building · Anglican parish church |
| Location | Suffolk (Diocese of St Edmundsbury and Ipswich) |
| System size | 25 kWp (south-facing vestry roof — unlisted curtilage) |
| Battery storage | None |
| Gross project capex | £21,000 |
| Grant value | £14,500 (combined: Methodist Insurance £5k + Allchurches Trust £7k + Diocesan Trust £2.5k) |
| Year-1 tax relief | N/A (registered charity — no CT liability) |
| Net effective cost | £6,500 |
| Annual savings/revenue | £4,800/year |
| Post-tax payback | 1.4 years (post-grant) |
| CO2 saving | 11 tCO2e/year |
| Year commissioned | 2025 |
Context
The parish church is a Grade II listed Anglican building in rural Suffolk — late 14th century with a Victorian vestry extension. The Parochial Church Council (PCC) approved a 'Eco Church' programme in 2023, targeting Net Zero by 2030 in line with the Church of England General Synod resolution. The PCC included one trustee with energy industry experience — a critical factor in the project's success.
Annual church electricity consumption: 14,200 kWh — driven by lighting, heating (some electric storage heaters), and weekly community lunch club. The church was paying £4,300/year on a standard small business commercial tariff (which the diocesan procurement team had been encouraging churches to switch from for years without success).
The Grade II listing meant rooftop solar on the principal church building was excluded. Solar on the Victorian vestry extension was investigated.
The challenge
Listed building solar is the most complex category in UK commercial solar. The PCC navigated:
1. **Faculty jurisdiction.** The Church of England's planning consent regime. The Diocesan Advisory Committee for the Care of Churches (DAC) reviews all proposals.
2. **Listed Building Consent.** Additional to faculty jurisdiction — required for any work to a listed building. Local authority planning department.
3. **Conservation officer engagement.** Suffolk County Council's Historic Environment team had to be consulted as part of LBC.
4. **Insurance.** Methodist Insurance (the dominant church insurer) had specific requirements for solar installations on listed church buildings.
5. **Fundraising.** The £21,000 capex was beyond the PCC's reserves. Multiple small grants required for a viable funding stack.
Timeline: 18 months from PCC decision to commissioning. Most of the delay was in faculty jurisdiction — DAC sub-committee meetings happen quarterly.
Funding approach
The PCC engaged the Diocesan Environmental Officer (DEO) in pre-application — free and invaluable. The DEO confirmed that:
- The Victorian vestry extension was within the listed building curtilage but not itself listed - Solar on the vestry's south-facing roof slope (not visible from the public street view) was likely to be supported by the DAC - Faculty jurisdiction would still be required even though the vestry was unlisted (because the curtilage is treated as a single asset)
Funding stack for the £21,000 capex:
- **Methodist Insurance Eco Grant:** £5,000 (their flagship faith-sector solar grant) - **Allchurches Trust grant:** £7,000 (despite the name, funds all faith communities) - **Diocesan Environmental Fund:** £2,500 - **Local fundraising:** £4,000 (£100 per parishioner appeal across 40 active members) - **Reserves transfer:** £2,500
**Total grant + fundraising: £18,500. PCC contribution: £2,500.**
Listed Building Consent and Faculty Jurisdiction both granted on first application — saving 6-12 months versus more contentious cases.
Outcome & performance
The 25 kWp solar PV system commissioned in April 2025. Year-one performance:
- **Annual generation:** 23,200 kWh - **Self-consumption:** 38% (community lunch club + Sunday services; some midweek storage) - **Annual saved import:** £2,440 at 30p/kWh church commercial rate - **SEG export revenue:** £2,360 at Octopus Outgoing Fixed 15p × 14,400 kWh - **Total annual savings/revenue:** £4,800 - **CO2 saving:** 11 tCO2e/year
The church achieved Eco Church Gold accreditation in 2025 and was featured in the Diocese's 2025 annual report. The PCC is now planning a follow-on project: switching the storage heaters to air-source heat pumps, funded by a fresh round of fundraising and (hopefully) the next National Lottery Climate Action successor scheme.
Lessons learned
- Engage the Diocesan Environmental Officer early — free advice that can save 6-12 months on faculty jurisdiction.
- Listed church solar usually means ancillary buildings (vestry, parish room, hall) — not the principal listed building.
- Charitable trust funding for solar is a portfolio approach — typical projects need 3-7 grant sources to make the maths work.
- Methodist Insurance and Allchurches Trust are accessible to all faith communities, not just Methodist/Anglican.
- Faculty jurisdiction timelines (3-9 months for straightforward cases) require careful programme planning — Christmas/Easter break complications add another 1-2 months.
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