Grade II listed · Three Rivers

North Grove Lock House

North Grove Lock House is a Grade II listed building in Three Rivers, first listed on 3 October 1985. It is one of 331 Grade II entries among 348 listed buildings in Three Rivers; 35% of Three Rivers’s current entries were listed before it.

List entry
Field	Value
Name	North Grove Lock House
Grade	Grade II — special interest
List entry number	1348210
Date first listed	3 October 1985
Local planning authority	Three Rivers
Location	51.69945, -0.43897 (map)
Official record	Historic England list entry 1348210

Planning works on this listed building?

Planium checks which consents Three Rivers will require for your works on North Grove Lock House, 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 North Grove Lock House

Name	Grade	Distance
North Grove Lock	II	10 m
The Unicorn Public House	II	354 m
42 and 44, Gallows Hill	II	372 m
11, Gallows Hill	II	385 m
Dickinson House	II	463 m
Church of St Paul	II*	666 m
The Old School House	II	667 m
Langleybury War Memorial	II	687 m
The Hollies	II	689 m
Loyd Memorial Cross About 20 Metres South of Church of St Paul	II	695 m

Frequently asked questions

Is North Grove Lock House listed?

Yes. North Grove Lock House is on the National Heritage List for England as a Grade II listed building, list entry number 1348210, first listed on 3 October 1985. The full list entry with its description and map is on Historic England’s website.

Do I need consent for works to North Grove Lock House?

Works that affect its character as a building of special architectural or historic interest — inside or out — need listed building consent from Three Rivers, 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.