Unlocking development wirthin a constrained historic core
Proposed change of use with internal and external alteration including raising the roof within the St Stephens Conservation Area of Norwich, Timber Hill Norwich.
East Anglian Heritage was commissioned to undertake the writing of a HAIA on the recommendations of the clients architects Cannon Clarks Architects as part of the validation for the proposed scheme of works to undertake a change of use of a building within the St Stephen Conservation Area of Norwich.
Modern 'Street Food' aesthetic Graffiti Artwork on internal wall © East Anglian Heritage
Timber Hill, Norwich, Norfolk
The Challenge
7A Timber Hill sits within the tightly enclosed historic core of Norwich, positioned behind the street frontage and surrounded by a dense concentration of designated heritage assets, including multiple listed buildings and the wider St Stephens Conservation Area.
The site itself comprised a vacant former nightclub/bar, heavily altered internally and of limited historic fabric, but located within a highly sensitive heritage context.
The key issue was clear:
- The proposal involved significant vertical extension and reconfiguration;
- The site was embedded within the rear setting of multiple listed buildings;
- The local authority had already signalled concern regarding impact on setting and character.
At its core, the challenge was to determine whether meaningful development could occur without causing harm to the significance of surrounding heritage assets.
Our Approach
EAH undertook a full Heritage & Archaeological Impact Assessment grounded in its standard evidential framework:
Evidence → Significance → Change → Effect → Planning Balance
1. The assessment moved beyond a simple visual appraisal and instead focused on:
Understanding the true nature of Timber Hill
Historic mapping and archaeological evidence demonstrated that Timber Hill is not a static medieval streetscape, but a palimpsest of continuous urban renewal, including:
- Post-medieval and 17th–19th century rebuilding;
- Extensive 20th-century bomb damage and redevelopment;
- Modern interventions including Castle Mall and later infill schemes
This reframed the site not as a fragile relic, but as part of an evolving urban environment.
2. Reframing the role of rear plots
A key finding was that the rear areas of Timber Hill:
- Are historically secondary, service-based, and incrementally developed;
- Display a mixed and often degraded character rather than curated heritage value;
- Already accommodate modern interventions and alterations
This directly challenged the assumption that the site contributed positively to the setting of surrounding listed buildings.
3. Reassessing the significance of 7A itself
The building was identified as a non-designated heritage asset, but with limited intrinsic value:
- Substantial internal alteration and loss of fabric;
- Significance derived primarily as a marker of 19th-century urban density, rather than architectural merit.
This allowed a proportionate and policy-compliant approach to change.
4. Testing actual visibility and setting relationships
A detailed site inspection and viewpoint analysis established that:
- The site has no meaningful intervisibility with key street frontages;
- Impacts are confined to rear elevations, not principal heritage views;
- Wider townscape and conservation area character remain unaffected
This was critical in demonstrating that perceived harm was theoretical rather than real.
Outcomes
The assessment concluded:
- No harm to the setting of principal heritage assets at street level;
- Low-level less than substantial harm to limited rear setting relationships;
- Moderate physical change to a non-designated asset, but without loss of its core evidential value.
Crucially, these impacts were clearly outweighed by public benefits, including:
- Delivery of new residential units within the city centre;
- Reuse of a vacant and degraded site;
- Enhancement of underutilised rear urban space.
Download Report
View looking north down Timber Hill Street © East Anglian Heritage
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