Can I skip ecology survey if no obvious wildlife?

Risky — LPA + statutory consultees (Natural England) assess habitat suitability, not visible activity. Submitting without required survey leads to: planning refusal, validation hold, or condition requiring survey post-decision. Always check LPA planning portal for ecology submission requirements + pre-app advice if unclear.

What if survey delays my programme?

Plan ahead — book ecologist 4–6 months before planning submission. Seasonal surveys (bats, birds, GCN, reptiles) restrict construction start to autumn/winter following spring/summer survey. Worst case: 12-month programme slip from missed survey window. Engage at design stage to avoid.

Is BNG calculation separate from ecology survey?

Related — BNG metric uses Phase 1 Habitat Survey output as baseline. Many ecologists package PEA + Phase 1 + BNG metric + 30-year management plan together: £4,500–£12,500. Cheaper than ad-hoc commissioning later. Always discuss BNG scope when commissioning PEA.

Ecology Survey Cost London Renovation 2026 | Builderr

How Much Does an Ecology Survey Cost for a London Renovation?

London ecology survey costs vary by scope: Preliminary Ecological Appraisal (PEA) £950–£2,850; Phase 1 Habitat Survey £1,250–£3,850; Bat Preliminary Roost Assessment £450–£950; Bat emergence/re-entry survey £1,800–£4,500; Great Crested Newt survey £2,400–£5,500; Breeding Bird Survey £850–£2,800; Reptile survey £1,250–£3,500; full BNG metric £1,850–£4,850. Use CIEEM-registered ecologist. Plan 4–8 weeks lead time, longer May–Sept booking.

Survey types

Preliminary Ecological Appraisal (PEA): broad-scope desktop + walkover identifying habitats, protected species evidence, recommends further surveys. Output: PEA report supporting planning application. £950–£2,850. Phase 1 Habitat Survey: JNCC standard habitat mapping by type + condition. £1,250–£3,850. Bat Preliminary Roost Assessment: building/tree inspection for roost evidence. £450–£950. Bat emergence/re-entry surveys: 2–3 dusk/dawn visits May–Sept. £1,800–£4,500. Great Crested Newt (GCN) Habitat Suitability Index + presence-absence survey: pond + 250m surrounding habitat assessment + eDNA water sample test or torch surveys. £2,400–£5,500 (eDNA cheaper than torch). Breeding Bird Survey: dawn visits Apr–June × 2–4. £850–£2,800. Reptile Survey: refugia placement + 7 checks April–Sept. £1,250–£3,500. Otter/Water Vole survey: river/pond assessment. Hazel Dormouse: nut hunt + tube survey. Badger sett survey. BNG metric calc + design: £1,850–£4,850.

When required

PEA usually requested by LPA as planning condition or pre-app advice where habitat suitable — most suburban + green-belt-adjacent London boroughs (Richmond, Bromley, Hillingdon, Havering, Barnet, Sutton, Bexley); less common in dense central postcodes. Bat survey: required where works affect roof voids, lofts, fascia/soffit, mature trees, basements — most loft conversions in leafy boroughs caught. GCN: required within 500m of any pond on site or adjacent (Outer London, Green Belt + Metropolitan Open Land). Breeding birds: required if works affect mature trees, hedges, ivy-covered facades, or scrub during March–August. Reptiles: brownfield, allotments, rough grassland, railway embankments — outer London brownfield typical.

Process + timeline

Engage ecologist at RIBA Stage 2 (Concept Design) before planning submission — survey results inform design. CIEEM-registered ecologist mandatory for LPA acceptance (Chartered Ecologist or CEcol equivalent). Booking: bats + birds + reptiles + GCN restricted to spring/summer survey windows — book 6+ months ahead for project planning summer build. PEA + Phase 1: year-round. Output: report submitted as planning application supporting document; LPA + Natural England consult; planning conditions may follow (e.g. mitigation licence required pre-commencement). Builderr ecology partner: panel of 4 CIEEM consultancies covering all London; typical turnaround PEA 3–5 weeks, full survey suite 12–24 weeks May–Sept window.