DoubleTree by Hilton, Cadbury House wants to build an extra car park to host the hundreds of staff who work on site.
Hotel bosses are seeking the green light from North Somerset Council after two unsuccessful applications in 2017 and 2018.
A new planning team has been taken on to try to convince the council to allow the car park, amid previous concerns over building in the greenbelt and protecting trees.
The business has a gym, hotel, restaurants and conference facilities available and wants to allow 25 staff spaces to free up room for customers.
In its application to North Somerset, Cadbury House says: "The business now employs 250 full and part-time jobs, with 95 per cent living locally. Collectively the wage bill is circa £3million with a good percentage of that being spent locally."
Yatton and Congresbury parish councils support the plan, although the latter expressed disappointment at loss of greenbelt.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here