This advert, posted yesterday on Twitter and Facebook by Cardiff-based Modelling Network, has generated a social media backlash.
It has now been deleted. The property agent named in the advert, Kingston, told Wales Online it has no links with Modelling Network and did not ask it to advertise the job.
Its own advert makes no mention of the employee's appearance.
Former Labour deputy leader Harriet Harman shared the advert on Twitter and referred it to the Equality and Human Rights Commission.
Social media users expressed their anger, including the Cardiff Central MP, Jo Sevens.
BuzzFeed News has contacted Modelling Network for comment.