All Saints Church in Lindfield is hoping to raise £20,000 to build a house for a group of Romanian orphans.
Members of the congregation plan to give up their time to build the home which is linked to the charity Caminal Felix.
The cost of building the house is £20,000, of which £12,000 has already been raised.
The group are holding an indoor cycle event on 12 July where they plan to cycle the 1242 miles between Lindfield and Oradea in Romania on five exercise bikes.
There will also be a barbecue and cream teas throughout the day.
A spokesman said: “We would like as many people as possible to support the team on the day or volunteer to complete an hour’s cycle raising sponsorship.”
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