Mr Neill told hearings commissioner Peter Crawford that the building had been designed to help alleviate boredom and loneliness by using Eden Alternative and Green House Project principles to create a positive area for the elderly.
The building's 3-metre distance from the boundary with Marwood Place was twice the legal minimum, with the 5.6m high external walls about the same height as a typical suburban two-storey house.
Mr Neill said the shadow line from the building would reach the houses between 2pm and 3pm on the winter solstice, depending on their distance from the boundary. Sunset was just after 5pm.
He said it was important to compare the size and siting of the proposed building with the 9m height and 1.5m boundary distance permitted by the City Plan. The legal limit would generate a significantly worse shading situation.
He said it could not be concluded that the development would cause colder houses and higher power bills, when they had demonstrated that shading would be significantly less than an "as of right" development.
On the issue of neighbourhood concerns about the bulk and length of the building, with some comparing it with the Berlin Wall, Mr Neill said the side facing residents had been designed to step in and out at the major sections, with the facade further broken up at the junctions of bathrooms and bedrooms.
Planning consultant Shae Crossan answered residents' concerns about the length of the building. "While other district plans have controls over building lengths adjoining residential boundaries, there are no controls in the Tauranga City Plan." Mr Crossan said it was inevitable that the development would change the character and environment, given that the site was vacant. "The facility can be absorbed in this location and the effects on residential character will be minor."
Mr Crawford reserved his decision.