Heat Pumps in Mid-Cornwall Villages: Sticker, Polgooth, St Mewan & More

Mid-Cornwall: Between St Austell and Mevagissey

The rural parishes west and south of St Austell — taking in villages like Sticker, Polgooth, St Mewan, Trewoon, and the larger settlement of St Stephen-in-Brannel — form a distinctive mid-Cornwall landscape of gentle hills, old tin and china clay workings, and scattered farmsteads connected by narrow country lanes. These communities are close to our base, almost universally off the mains gas grid, and home to a mix of traditional Cornish cottages, former mining workers' homes, and modern rural residential development.

CCS Heating & Renewables can reach every village in this cluster within 15 minutes from our depot, and the density of heat pump demand here reflects years of oil price uncertainty driving interest in alternatives. The £7,500 BUS grant is available for all qualifying oil-to-heat-pump replacements throughout this area.

Sticker

Sticker sits on the B3287 between St Austell and Mevagissey — a roadside village that grew at a crossroads, with a mix of period and modern housing on its fringes. The village is almost entirely off-grid and oil-heated. No conservation area constraints apply, making heat pump installation straightforward. Sticker's position — on the higher ground between two valleys — gives good solar exposure for the many homeowners who want to combine solar with a heat pump. See our Sticker solar panels page for specifics.

Polgooth: Former Tin Mining Village

Polgooth has a remarkable industrial history: it was home to Polgooth Mine, one of the most important tin mines in the world during the 18th century. The landscape still shows evidence of former mining activity. Today it is a quiet residential village with stone cottages, Victorian and Edwardian homes, and more recent residential development. All are off-gas and suited to heat pump installation — particularly the older stone-built properties, which have excellent thermal mass and benefit from the lower flow temperatures that heat pumps operate at. The BUS grant applies throughout Polgooth.

St Mewan and Trewoon

St Mewan is a tiny hamlet between St Austell and Mevagissey, with a cluster of rural properties on the country roads south of the town. As one of the smallest communities in our service area, virtually every property is off-gas, and the rural lanes surrounding the hamlet lead to further farmsteads and agricultural properties equally dependent on oil heating.

Trewoon, by contrast, is a larger residential village on the northern edge of St Austell — a settlement that grew from a china clay workers' community into a mixed residential area of Victorian terraces, 20th-century estates, and newer housing. Around 70% of Trewoon properties are off the mains gas grid. The village is well-established and benefits from being just 4 miles from our base with excellent road access.

St Stephen-in-Brannel

St Stephen-in-Brannel is the largest community in this cluster — a parish of around 7,500 residents taking in St Stephen, Coombe, and surrounding clay country hamlets. The area has a strong china clay heritage and a mix of housing types from Victorian clay workers' cottages to modern residential estates. Off-gas rates vary across the parish: areas near the B3274 corridor have some gas connection, but the majority of the parish is off-grid.

St Stephen is also adjacent to the China Clay Country and benefits from the same open-sky solar exposure that makes the clay plateau excellent territory for solar panels. Pairing solar panels with a heat pump here is a particularly strong package given the off-gas context and unobstructed roof aspects on many properties.

Property Types and What They Mean for Heat Pumps

Mid-Cornwall's housing stock reflects the area's industrial and agricultural heritage:

• Former tin and clay workers' cottages (pre-1900): Solid granite walls, 400–600mm thick, with minimal insulation but excellent thermal mass. Heat pumps work well in these buildings when correctly sized. Our older properties guide covers this in detail.
• Victorian and Edwardian semis: Solid brick or stone construction, often with original single-glazed sash windows updated to double glazing in recent decades. Loft insulation usually present. Good heat pump candidates with modest radiator assessment work required.
• 20th-century council and private housing: Cavity wall construction, typically with insulation already present. These achieve the best CoP (3.0–3.5) and lowest running costs with heat pumps.
• Rural farmhouses and barn conversions: Often large floor areas requiring careful heat loss calculation. Underfloor heating is frequently the right distribution system choice for converted barns, giving heat pumps their best efficiency.

Grants and Funding

Every village in this cluster qualifies for the £7,500 BUS grant for oil-to-heat-pump replacement. Additional schemes available depending on household income:

• ECO4: Fully-funded installations for households receiving qualifying benefits (Universal Credit, Pension Credit, income-based JSA/ESA, and others)
• HEAT Cornwall: Cornwall Council's energy support scheme — connects eligible households earning under £30,000 with funding and installation support
• Warm Homes: Local Grant: An enhanced version of ECO4 available in Cornwall offering up to £30,000 for comprehensive whole-house energy upgrades

Our full grants guide explains eligibility for all schemes. For mid-Cornwall villages, the combination of BUS grant plus ECO4 or HEAT Cornwall where eligible can result in fully-funded installations for a significant proportion of households. Get a free survey and we'll assess grant eligibility as part of the visit.