A visit by a Welsh Assembly planning inspector to Maesglas play area in Cardigan has been scrapped following concerns raised by residents.
Campaigners from the North Cardigan Action and Support Group are fighting plans by Tai Ceredigion to build nine homes on the site.
The scheme has now gone to appeal.
But campaigners were appalled when they saw the planning inspector being shown around the site by a Tai Ceredigion consultant - which flouted WAG rules.
The group complained to WAG's planning inspectorate - and have been told that the site will now be inspected later next month by a different inspector.
A letter from quality and specialist casework manager Helen May apologised to campaigners for "any confusion or concern".
She adds: "Whilst we have no doubt that the inspector would have determined this appeal in a fair and impartial manner, we acknowledge that the conduct of this site visit was not in line with our ARSV guidance and that this has caused considerable concern to local residents. In light of the concerns expressed, and for the avoidance of any doubt and any perceived lack of impartiality, the appeal will now be determined by a different inspector."
Action group member Teresa Harries said: "We are pleased that our concerns were recognised."