A crowd of more than 1,500 saw Dominic Di Paola’s side edge a tight game with Harding’s 58th-minute goal to strengthen their promotion bid.
They sit fifth in the table but just eight points behind the leaders with a game in hand. They go to Hendon on Tuesday looking for a seventh straight win.
See pictures by John Lines from Horsham-Billericay on this page and the ones linked and get the news from the Hornets camp in the West Sussex County Times every Thursday.
1. Horsham v Billericay pictures by John Lines (8).JPG
Horsham v Billericay Town, Isthmian premier division Photo: Picasa : John Lines
2. Horsham v Billericay pictures by John Lines (28).JPG
Horsham v Billericay Town, Isthmian premier division Photo: Picasa : John Lines
3. Horsham v Billericay pictures by John Lines (3).JPG
Horsham v Billericay Town, Isthmian premier division Photo: Picasa : John Lines
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Horsham v Billericay Town, Isthmian premier division Photo: Picasa : John Lines