He's been granted financial support or backing from Statens Kunstfond (English: Danish Arts Agency) eight times throughout his career as a writer.
He is credited as the ideas man behind two episodes of the popular Danish TV-series Huset på Christianshavn, namely #64, Karlas kald (English: Karla's Calling), scripted by Karen Smith and #68, Dagen efter dagen derpå (English: The Day after the Following Day), scripted by Henning Bahs.
As a writer of fiction he has written poetry, short stories, novels and plays (mostly for radio), and in genres he has dealt with both social realism and the fantastic.
During his authorship he has experimented a lot with genres and language structures, which led famous Danish writer and critic Poul Borum (1934–1996) to write about him in a review: "Anders Westenholz is difficult to read, but worth every effort".
Together with for instance Erwin Neutzsky-Wulff he is among the few Danish writers to write fantastic literature (fantasy, sci-fi, horror etc.)