Your church website needs to help visitors work out exactly where you meet!
If you have access to a scanner, you may find it easiest to ask someone in your church to draw a simple map using old-fashioned paper and pencil. Please ensure you optimise (compress and resize) your image to keep your church website speedy. Note the Church123 system automatically optimises images for speedy download across the Internet.
The following sites offer maps which your church can link to (don't copy the map onto your site, since that breaches copyright). Coverage is variable, so try them all and see which is best for your area. Church123 users can easily include maps in their pages by simply clicking the link option and typing a postcode (zip code).
Most sites require you to license their maps if you want to have a copy visible on your website. However "Get-A-Map" provides free maps of the UK as long as you include their copyright.