Hilsea Lines moat restoration and sea defences
The fifth North Portsea coastal phase includes 1.3 km of defences at Hilsea Lines. It is separate from the lido renovation.
ProposedApprovedUnder wayCompleted
- Last evidenced stage
- Under way as of 17 October 2026. The council’s Hilsea Lines page says sea-defence work continues until the end of 2026.
- Who owns it
- Coastal Partners with the Environment Agency and Portsmouth City Council
- Next decision or milestone
- Published completion evidence for the final phase; end-2026 remains the published schedule.
- Funding
- Amount not stated · Environment Agency (Flood defence grant)
Earlier retained figure, not reconciled with the lines above: Not published as a single figure. Evidence: Published. Funder: North Portsea Coastal Scheme Phase 5 — Environment Agency and Coastal Partners. It is kept out of any total until its scope and date are matched.
- Delivery vs outcome
- Outcome evidence: The council states the wider scheme will protect over 4,000 homes and nearly 500 businesses; this is the intended protection scope, not a measured flood-loss total. An open building or working installation is delivery evidence; use, emissions or effects are outcome evidence and are reported separately.
- Where
- Portsmouth North
The defence route crosses north-island locations. The Hilsea place-name is not proof that its full route lies in Hilsea ward.
Dated records
- 2026-10-23 output Large parts of Ports Creek and Hilsea Lines opened; work continues around Peronne Road Bridge, with full completion expected in autumn 2027. source ↗
Why it matters
- Issue: Sewage spills and flood defences
- Proposal: Join up safe cycle routes across Portsea Island Facts Count proposal
- Proposal: Track coastal protection through completion and upkeep Facts Count proposal
Sources
- Council: Hilsea Lines, reopened lido and coastal works checked 2026-10-17