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Writer's pictureTiffany Snowden

What is a Grade I Listed Building?

If you have followed our blog for a while now, then you may have come across our posts covering Grade II and Grade II* listed buildings. Today, we are taking a look at Grade I listed buildings, afforded the highest level of protection within the listing system. Of the nearly 400,000 listed buildings in the UK, Grade I listed properties account for around 2.5%. So what exactly is it about these buildings that make them so special? Let's take a look!


Principal view of Castle Howard and gardens
Grade I Listed Castle Howard, North Yorkshire

Criteria for Grade I Listed Buildings


Buildings are listed on account of their special architectural and historic interest, which can be derived from its archaeological, historic, architectural, or artistic interest. Grade I listed buildings are considered to be of 'exceptional interest', which is why only a small proportion merit this level of protection. Generally speaking, these sites often have not just local or regional importance, but also national importance, whether it be due to the architect who designed it, a famous historical figure who lived there, or perhaps it is just an excellent example of that school of architecture or period.


Can I Make Changes to my Grade I Listed Building?


Whilst Grade I listed buildings are afforded the highest level of protection under the listing system, that does not mean that they are stuck in time. Historic England and local authorities understand that change is inevitable but as with any listed building, it is about ensuring that any proposed alterations enhance or at the very least, preserve its significance. Grade I listed sites tend to be larger in scale, making their significance often more complex to establish. It is important that a building's existing baseline of significance is well understood before proceeding with the design of any scheme, as this will help ensure that proposals are heritage-led and work with the fabric of the building than against it.


The answer, therefore, is yes - you can make changes to your Grade I listed building. You will just have to make sure that those changes respond to the special character and appearance of the building, and that they are robustly justified when it comes to submitting an application for formal Listed Building Consent.


Examples of Grade I Listed Buildings


Listed buildings come in all shapes and sizes, from country houses and castles to cathedrals and bridges. Here are five of our favourites, and a bit about what makes them so special to merit a Grade I listing!


Hampton Court Palace, London


Hampton Court Palace, once the home of King Henry VIII, is one of Britain’s most remarkable royal residences. Built in the early 16th century, the palace is steeped in Tudor history and has witnessed key events in British monarchy, including Henry’s marriages and the English Reformation. Architecturally, the palace showcases a rare fusion of Tudor and Baroque styles, with its sprawling red-brick facade, intricate chimneys, and grand state apartments. Today, Hampton Court offers visitors a window into royal life through its exquisite gardens, historic rooms, and famous hedge maze.


Front of Hampton Court Palace
Hampton Court Palace

Blackpool Tower, Blackpool


Blackpool Tower, opened in 1894, is one of the UK’s most famous seaside landmarks. Inspired by the Eiffel Tower, it rises 158 metres above the Lancashire coast, offering panoramic views of the Irish Sea and surrounding areas. As a cultural icon, it played a key role in Blackpool’s rise as a major British holiday destination during the 19th and 20th centuries. Architecturally, the tower’s steel lattice structure reflects Victorian engineering prowess, while the complex houses the Tower Ballroom and Tower Circus, both renowned for their entertainment heritage. For more about Blackpool Tower, check out our blog post!


Blackpool Tower on the seafront
Blackpool Tower

Humber Bridge, Hull


The Humber Bridge, opened in 1981, is one of the world’s longest single-span suspension bridges, connecting the East Riding of Yorkshire and North Lincolnshire. Spanning the Humber Estuary, it dramatically improved regional transport links and remains a vital piece of infrastructure. Architecturally significant for its innovative design, the bridge held the record for the longest suspension span for 16 years. It stands as a symbol of British engineering excellence, offering breathtaking views of the estuary and surrounding landscapes.


Bridge in Hull at sunset
Humber Bridge

York Minster, York


York Minster, one of the largest and most impressive Gothic cathedrals in Northern Europe, stands as a masterpiece of medieval architecture. Construction began in the 13th century, and the cathedral has since been a spiritual and historical heart of the city. Its towering spires, intricate stained-glass windows, and stunning stonework reflect the grandeur of the Gothic style, while its Great East Window is the largest expanse of medieval stained glass in the world. As both a religious site and cultural treasure, York Minster continues to draw visitors from around the globe, showcasing centuries of English craftsmanship and devotion.


Front of York Minster
York Minster

Warwick Castle, Warwick


Warwick Castle, built by William the Conqueror in 1068, is one of England’s most iconic medieval fortresses, steeped in over a thousand years of history. It played key roles in events like the Norman conquest, the Wars of the Roses, and the English Civil War, while serving as a residence for powerful earls and hosting royal visitors. Architecturally significant, the castle features a blend of medieval and later styles, with its stone keep, curtain walls, and towers showcasing the evolution of military fortifications from the Norman to the Tudor eras. Today, it remains a popular tourist attraction, offering a rich glimpse into England's past.


Stone castle and access bridge, Warwick
Warwick Castle
 

At Blue Willow Heritage, we provide expert advice on planning, the historic environment and conservation works to historic buildings. If you need support managing your listed building, from Grade II listed cottages to Grade I listed country houses, then Blue Willow Heritage can help. If you would like to discuss your project or simply would like to have a chat, then please do not hesitate to get in touch.

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