Grade I listed · Dacorum

Church of St Mary

Church of St Mary is a Grade I listed building in Dacorum, first listed on 18 June 1948. It is one of 12 Grade I entries among 911 listed buildings in Dacorum; 0% of Dacorum’s current entries were listed before it.

List entry
Field	Value
Name	Church of St Mary
Grade	Grade I — exceptional interest
List entry number	1078099
Date first listed	18 June 1948
Local planning authority	Dacorum
Location	51.75908, -0.47276 (map)
Official record	Historic England list entry 1078099

Planning works on this listed building?

Planium checks which consents Dacorum will require for your works on Church of St Mary, 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 I buildings are of exceptional interest — only about 2.5% of listed buildings in England. Any application for listed building consent is notified to Historic England, and alterations are scrutinised closely.

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 Church of St Mary

Name	Grade	Distance
Town Hall	II	48 m
44 and 44a, High Street	II	60 m
48-52, High Street	II	63 m
The King'S Arms Public House	II	66 m
45, 47 and 47a, High Street	II	69 m
Garden Walls of Manor House	II	69 m
54-58, High Street	II	72 m
57, High Street	II	72 m
40, High Street	II	73 m
59, High Street	II	73 m

Frequently asked questions

Is Church of St Mary listed?

Yes. Church of St Mary is on the National Heritage List for England as a Grade I listed building, list entry number 1078099, first listed on 18 June 1948. The full list entry with its description and map is on Historic England’s website.

Do I need consent for works to Church of St Mary?

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