Greater London Historic Environment Record (GLHER)
The GLHER is a major resource for understanding the historic environment of Greater London.
- The new online GLHER
- What is the Greater London Historic Environment Record?
- How do I access the GLHER?
- Charges and service levels for commercial searches
- What radius do I need for my search area?
- What is the Greater London Historic Environment Record currently working on?
- Volunteering with the Greater London Historic Environment Record
The new online GLHER
We are excited to announce the launch of the new online Greater London Historic Environment Record.
This project has been part of a collaborative effort between the Getty Conservation Institute, Historic England, and the City of Lincoln Council to develop a new heritage management system for use in the UK: Arches for HERs. This system is based on the open-source software platform for Cultural Heritage Management, Arches, developed jointly by the Getty Conservation Institute and the World Monuments Fund and used by heritage organisations worldwide.
The new online GLHER provides for the first-time direct public access to the London Record and the bulk of the GLHER's data covering archaeological sites and finds, historic buildings, historic parks and landscapes, and more; just over 98,000 records ranging from the earliest human occupation, right up to modern times. Sites can be searched by either using the easy-to-use search tools, or its built-in mapping features.
Online help is available here or in the system.
Please Note:
Commercial and academic users may use the online GLHER to carry out preliminary investigations or to help them decide their search parameter needs for their work.
However, users should contact the GLHER team for a full HER search, either through the online request form, or by email ([email protected]), as the GLHER holds information that is not, or not yet, on the HER which we supply as part of our enquiry service, and we also carry out data enhancement on the data supplied.
There is a charge for commercial data requests, but no charge for academic or general public data requests. For more information, see Charges and service levels for commercial searches.
What is the Greater London Historic Environment Record?
The GLHER is a comprehensive and dynamic resource for the historic environment of Greater London. From the earliest human occupation to the present day, its data supports the work of the Greater London Archaeological Advisory Service (GLAAS).
Our computerised record contains over 98,000 entries, providing data on:
- Archaeological sites
- Historic buildings
- Historic parks and landscapes
- Archaeological finds
- Heritage features
- Supporting sources of information
Find out more about what data we hold.
How do I access the GLHER?
The GLHER is a public record, and we welcome enquires from anyone interested in the historic environment of Greater London.
You can access GLHER data in 3 ways:
Request a search
The GLHER team will search for and supply you with the relevant GLHER data in digital format, accompanied by a 12-month licence to reuse it. After 6 months, on request, you can get a data update.
There's no charge for searches for members of the public and academic researchers unless the request is for large amounts of data.
The GLHER aims to respond to all searches within 10 working days, but more usually returns results within 5 days.
Commercial enquiries are charged for, and a 2-day Priority Search service is available at a premium. More about services and charges.
Visit the GLHER office
You can consult the GLHER in person, 10 am to 4.30 pm, Monday to Friday. During a visit to our office, you can search the GLHER database and GIS maps, use our small library and explore the physical records we hold.
Email [email protected] to arrange a visit and please check our London office webpage before you set out on the day of your visit. Space is limited, so please give as much notice as possible when making an appointment to visit.
The GLHER online
The GLHER is available online through our new site.
An abridged version of the GLHER is also available online from the Heritage Gateway along with 60 other HERs across England, as well as national resources including the National Heritage List for England, Church Heritage Record, and the National Trust Heritage Record.
The GLHER database is also available via the Archaeological Data Service: Archsearch webpages. Please note that this information is not current. For up-to-date information, visit the GLHER online or request a search.
Charges and service levels for commercial searches
We charge for licensing the commercial, for-profit reuse of GLHER information. There are 3 search service levels to choose from:
Standard searches
The GLHER team responds to search enquiries within 10 working days, although usually we'll return results to you within 5 days. For large area searches, or searches with many data records, more than 10 days may be needed.
As part of the search, the GLHER team also checks that the data is up-to-date, and adds information on activities (creating new HER 'Activity/Event' and 'Source' records) which GLAAS has been notified of but not yet added to the GLHER database; our grey literature report backlog.
Data will be supplied under a 12-month data licence but after 6 months users are entitled to, on request, a free check into whether the data is still up-to-date. If on checking we find that an updated search is necessary, then that would be chargeable.
The standard unit for charging purposes is 15 minutes with a minimum charge of one hour (£100+VAT). A quote will be provided in each case, and must be accepted and our data licence signed before work can start. The quote will be given as +/- 20% of the estimated cost of the search. Average charges are likely to be in the range of £100 - 200 (including VAT), generally lower in the Outer London boroughs and increasing in the Inner London boroughs. (see the Greater London Historic Environment Record Access and Charging Policy).
If we have not heard from you within 5 working days of supplying a quote, we will assume you do not wish to go ahead with the search, and our estimate will no longer be valid.
Following a data request, Historic England will send an invoice to the HER user at the end of the month. Payments should be made within 30 days, and access to Historic England (chargeable) services may be suspended if payment is not made within this time.
Priority searches
A priority search will be returned to you within 2 working days. It costs an additional £65+VAT and is subject to staff availability.
Enhanced data service
On top of the standard search you can request further enhancement of the HER data to suit your needs. This might include:
- GIS mapping of archaeological excavation areas and borehole locations
- Review and creation of monument records with a short report indicating current interpretations of undesignated heritage assets
- Large area (greater than 10 square kilometres) data agreements providing regular updates prioritised to customer needs.
This is a bespoke service that will be individually specified and costed.
Due to the nature of the work required for enhanced data searches, they cannot be undertaken as priority searches.
How search charges are priced
As a public body, we aim to cover the costs of these services. They are neither subsidised with taxpayers' money, nor make a profit.
All charges are on a full cost recovery (not-for-profit) basis including the full cost of staff time, IT costs and administration time.
What radius do I need for my search area?
It is essential to obtain an up-to-date search on archaeological discoveries and activity for the site and its surroundings from the GLHER, and a licence for data use. It is the responsibility of the organisation undertaking a desk-based assessment to ensure that the search area is appropriate to the location and nature of the development.
Generally, we would expect search areas in Inner London to extend 250 to 500 metres from the site and in Outer London 500 to 1000 metres. Discussion with the GLAAS case officer (for searches in the City of London and Southwark contact the Borough Archaeological Advisor) can help ensure an appropriate search is run. Overly narrow search areas or arbitrary limits on the number of records returned should be avoided.
A search on other databases, such as the Heritage Gateway, or use of the GLHER online, is not an acceptable substitute for requesting a GLHER search and may constitute a breach of copyright. The online GLHER, Heritage Gateway and the Archaeological Data Service: Archsearch however, may be used as a guide to what may be within your area of interest, and the likely cost for a data licence.
If you need an HER search for a proposed listed building consent application or for a heritage statement relating solely to internal works to a listed building without ground excavation, we will carry out a ‘Property Search’. This involves a check of the GLHER to assess whether any records are held, in addition to designation information, in relation to the property. If we do not hold any relevant records then we will recommend that an HER search is not necessary, providing that the nature of the proposed works does not change. If we do hold relevant records, then we will conduct a full HER search, but restrict the search radius to the property boundary.
Information on designated heritage assets can be accessed, free of charge, via the National Heritage List for England on the Historic England website.
Find out more about the GLHER Access and Charging Policy.
What is the Greater London Historic Environment Record currently working on?
We are working on a number of projects, some of which our volunteers are carrying out for us. Current projects include:
- Data transfer from the National Record of the Historic Environment (NRHE) to the GLHER, as part of the national NHRE to HER project
- Enhancing our parks and gardens records
- Greenwich Park
- Revising our Archaeological Priority Areas
Historic England and the Forestry Commission: working together to cultivate London's green legacy
The Greater London Historic Environment Record (GLHER) is working with the Forestry Commission, with input from Natural England and the Association of Local Government Archaeologists, to help identify places which could be suitable for the creation of new woodland in Greater London. To do this, we are enhancing the Selected Heritage Inventory for Natural England (SHINE). The SHINE dataset is a special collection of information concerning historic sites and places in England that helps landowners and agencies involved in land management to identify and positively manage heritage assets on their land.
The SHINE dataset was originally created by Natural England and associated partners in 2008 to support agri-environment schemes but is now being enhanced to enable it to help woodland creation and other forestry schemes. More than half of the Greater London area is open (i.e. undeveloped) land and much of that is designated greenbelt or metropolitan open land. Trees and woodlands make London a healthier, more attractive place to live, and help to combat climate change and air pollution. London's urban forest has an estimated 8.4 million trees and covers around a fifth of the city's land area - it is increasingly recognised for its environmental, social and economic value (Mayor’s Trees and Woodlands Strategy). The expertise of the staff at GLHER means that as well as ensuring heritage assets are protected, opportunity areas where new planting might enhance or restore historic landscape character can be identified.
By combining heritage conservation with sustainable land management practices, we can help to preserve London's natural and cultural heritage while fostering a greener and more resilient urban environment. Linking heritage preservation, environmental stewardship, and community well-being will help to make London a more liveable and sustainable city for future generations.
For more information, please contact:
Volunteering with the Greater London Historic Environment Record
We have a number of opportunities for members of the public, or students to volunteer with the Historic Environment Record team. We provide full training and support so you don't need any previous experience, and you will play a critical role in helping to conserve London's historic environment.
