Why Perceived Volume Matters More Than Actual Volume

Author | Paul Skuse, Oakfield Design & Creation

In the first of our new series of ‘The Planning Advantage’ articles, we explore how contextual CGI can help clarify massing, reduce interpretation gaps and support more informed planning discussions.

In many planning discussions, objections are shaped less by measurable scale and more by how a proposal is experienced visually from surrounding streets and viewpoints.

And increasingly, it’s the perceived impact that shapes the direction of planning conversations.

We recently worked on a rooftop extension scheme within Birmingham city centre where the primary concern wasn’t architectural quality or policy alignment — it was how additional upper levels would be experienced from surrounding streets and public viewpoints.

On plan, the proposal appeared substantial. The additional accommodation introduced new duplex levels above the existing building, immediately raising concerns around skyline impact, visual dominance and how the scheme might alter the established rhythm of the surrounding cityscape.

But architecture is rarely experienced in plan view.

It’s experienced from pavements, junctions, approach roads and compressed urban sightlines.

That distinction matters.
 

Right click to open in new tab at full size. Additional rooftop accommodation remains visually recessive within Birmingham’s established urban skyline.

Through a series of verified contextual visualisations, the proposal could be assessed from the viewpoints people would actually experience in reality — including key streets where concerns around visibility and overbearing mass were most likely to arise.

What quickly became clear was that the perceived impact of the additional levels was significantly softer than anticipated.

From street level:
• existing parapet lines continued to dominate
• surrounding commercial buildings retained visual hierarchy
• and the recessed architectural treatment reduced the prominence of the rooftop additions within the wider skyline

The proposal itself hadn’t changed, but the understanding of it had.

That shift is often where planning discussions become more productive, because many objections initially emerge from uncertainty rather than outright opposition. When scale, massing and visual relationships are properly understood in context, conversations tend to move away from assumption and toward something more measurable.

This is increasingly where contextual CGI becomes valuable within the planning process.

Not simply as a marketing exercise — but as a form of visual planning communication, particularly within sensitive urban, rural and heritage settings, carefully constructed visualisations can help:
• clarify perceived volume
• reduce interpretation gaps
• support committee understanding
• and create more informed discussions around visual impact

In many cases, the most important thing a CGI does is not make a scheme look impressive, it helps people understand what they are actually looking at.

At Oakfield, we work alongside planning consultants, architects and developers to help communicate complex proposals through contextual CGI and visual planning communication.

Particularly within sensitive urban, rural and heritage settings, clarity around massing, visual impact and streetscape integration can significantly influence how proposals are understood long before formal decisions are made.

If it’s useful to compare notes on an upcoming scheme or planning challenge, we’re always happy to have a conversation.