Plans have been lodged to increase the number of eco-friendly homes at a "ground breaking" housing development near the city.
Landowner Joe Wiley is hoping to add four luxury mansions to the already-approved seven at Octagon Park in Little Plumstead.
The scheme was initially approved by Broadland District Council back in 2017 but since then just one of the homes has been completed and sold.
A report submitted to the local authority claims the existing scheme is no longer viable due to "high costs" and the "changing housing and economic market".
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To overcome these hurdles, Mr Wiley wants to add four homes to the development but reduce their overall size.
This, he has argued, would help "to reduce construction costs and be more accessible to the local market".
The Octagon Park development has been described by planners as "groundbreaking", with each home built to 'Passivhaus' standard.
This means owners would enjoy lower energy bills and what they don't use would be sent back to the grid.
The general layout of the site would not change and the existing access road would be retained and continue to serve the properties.
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