3 Space offer charities free access to properties, only costs are insurance, set up, cleaning, promotion and sometime utilities. They negotiate with landlords and deal with legal aspects of leases to offer charities a range of opportunities from shops to office space. 

The Ethical Property Foundation offers independent advice and training, to help charities and community groups with all property affairs. Initial diagnostic work is free as are some services.

The Royal Institute of Chartered Surveyors offer a one hour free consultation from a qualified surveyor to charities and voluntary organisations of all sizes with property matters to help you manage property more effectively.

Somewhere To is an innovative project making disused sites available for young people aged 16-25. Search online the contact a regional coordinator to set you up for a space. 

My Community Space is an online resource where charities can look for available space for hire, book courses on asset management and consult online resources about starting up and running a community organisation.

Third Sector Property provides advice on lease renewal, lease, rent reduction, asset management, and property valuations. They will give free advice over the phone, otherwise their fees are performance related wherever possible.