Grade II listed · Gosport

No. 2 Cavitation Tunnel (Buildings 46 and 47), Haslar Road, Gosport

No. 2 Cavitation Tunnel (Buildings 46 and 47), Haslar Road, Gosport is a Grade II listed building in Gosport, first listed on 22 July 2013. It is one of 180 Grade II entries among 202 listed buildings in Gosport; 85% of Gosport’s current entries were listed before it.

List entry
Field	Value
Name	No. 2 Cavitation Tunnel (Buildings 46 and 47), Haslar Road, Gosport
Grade	Grade II — special interest
List entry number	1413978
Date first listed	22 July 2013
Local planning authority	Gosport
Location	50.78497, -1.13007 (map)
Official record	Historic England list entry 1413978

Planning works on this listed building?

Planium checks which consents Gosport will require for your works on No. 2 Cavitation Tunnel (Buildings 46 and 47), Haslar Road, Gosport, lists what the heritage statement must cover and drafts the application text.

Ask Planium what consent you need

What the grade means for works

Grade II buildings are of special interest and make up over 90% of listed buildings in England. Most alterations, extensions and many internal changes still need listed building consent from the council.

The protection covers the whole building, inside and out, plus fixtures and attached structures. Typical works that need consent: replacing windows or doors, removing walls or historic fabric, changing roof coverings, installing solar panels or external insulation, and adding extensions.

Listed buildings near No. 2 Cavitation Tunnel (Buildings 46 and 47), Haslar Road, Gosport

Name	Grade	Distance
Number 2 Ship Tank, Haslar Marine Technology Park (former Admiralty Experiment Works)	II	77 m
Number 1 Ship Tank, Haslar Marine Technology Park (former Admiralty Experiment Works)	II	98 m
Haslar Terrace, Royal Naval Hospital, Haslar	II	239 m
Manoeuvring Tank (now known as Ocean Basin), Haslar Marine Technology Park (Former Admiralty Experiment Works)	II	256 m
Gunboat Yard boundary walls, watchtowers and gates	II*	314 m
Water Tower, Royal Naval Hospital, Haslar	II	317 m
Chapel of St Luke, Royal Naval Hospital, Haslar	II*	339 m
Dead House, Royal Naval Hospital, Haslar	II	343 m
Gunboat Sheds and Workshops	I	378 m
Gunboat Yard Engine House Complex	II	397 m

Frequently asked questions

Is No. 2 Cavitation Tunnel (Buildings 46 and 47), Haslar Road, Gosport listed?

Yes. No. 2 Cavitation Tunnel (Buildings 46 and 47), Haslar Road, Gosport is on the National Heritage List for England as a Grade II listed building, list entry number 1413978, first listed on 22 July 2013. The full list entry with its description and map is on Historic England’s website.

Do I need consent for works to No. 2 Cavitation Tunnel (Buildings 46 and 47), Haslar Road, Gosport?

Works that affect its character as a building of special architectural or historic interest — inside or out — need listed building consent from Gosport, in addition to any planning permission or building regulations approval. Like-for-like repairs often do not, but confirm with the council’s conservation officer before you start.

Source: National Heritage List for England, © Historic England 2026, via planning.data.gov.uk. Contains Ordnance Survey data © Crown copyright and database right. Licensed under the Open Government Licence v3.0. Retrieved 12 October 2026. Local authority assigned from the list entry point. This page is a summary — the legal record is the official list entry.