Log Burner in a Listed Building — UK 2026 Cost & LBC Guide

The short answer

UK 2026 typical: £3,500–£6,500+total installed. That's £500–£2,500 above a standard install — and the real overhead is time. Listed Building Consent (LBC) takes 8 weeks statutory determination, plus heritage consultation (£300–£800) and potentially pre-application discussions with the conservation officer.

The Listed Building Consent process

1. Heritage assessment (typically £300–£800 from a heritage consultant) describes the proposed install and justifies any visual or fabric impact on the listed building
2. Pre-application consultation with the conservation officer (recommended, not always mandatory)
3. LBC application submission — free of charge; requires the heritage assessment plus design and access statement
4. 8-week statutory determination period from valid application
5. Decision: approval, conditional approval, or refusal. For Grade I or II* properties, decisions may go to committee, extending timelines
6. Implementation: install must follow the approved scheme. Variations require fresh consent.

Working without LBC on a listed building is a criminal offence. Conservation officers do inspect on-site and can require remediation or reinstatement at the owner's expense.

What costs more in a listed building install

• Heritage consultant fees: £300–£800 for the initial assessment. £500–£1,500 for Grade I or II* if pre-application discussions are required
• Internal twin-wall flue routing: external flues are often refused on historic elevations. Internal routing requires more structural intervention and boxing/plastering — adds £1,000–£3,000 over a standard twin-wall install
• Sympathetic materials: lime-mortar repointing, slate or cast-iron register plates, traditional cowl designs. £200–£600
• Heritage installer premium: specialist installers charge 30–100% above standard day rates for listed building work
• Low-profile flue termination: some listed buildings prohibit chimney cap changes, requiring made-to-measure terminations

Conservation areas (separate from listed)

Properties in conservation areas (but not individually listed) need planning permissiononly if the external flue is on a principal (street-facing) elevation. Internal routes or rear-elevation exits typically don't require permission.

Planning fee for a householder application: £258 (England, 2025/26). Statutory determination: 8 weeks, often 10–14 weeks in practice. DEFRA-exempt stove almost always required as conservation areas typically coincide with urban Smoke Control Areas.

HETAS access — specialist

Fewer HETAS-registered installers have experience with listed building submissions and sympathetic-materials specifications. Look for installers who explicitly list heritage or listed building work in their HETAS profile. The pre-application heritage consultation, lime-mortar repointing, and the specialist material sourcing are not routine HETAS scope.

Cost escalators specific to listed buildings

1. Pre-application discussions for Grade I / II*: 4–8 additional months of process + £500–£1,500 in consultant fees
2. Unusual flue routing mandated by conservation officer: routing through multiple party walls or rooms to avoid external visibility — adds £1,000–£3,000 in structural costs
3. Reinstatement requirements: some LBC approvals require reinstatement to original condition on property sale, adding hidden long-term cost

Frequently asked questions