If you own a commercial shop within a building undergoing redevelopment, you may be entitled to additional benefits beyond what 'pagdi' system tenants receive. As a registered owner, you have grounds to negotiate for extra space, potentially an increase of at least 33% of your current area, and other monetary advantages. It's crucial to ensure transparency and clarity in any agreement with the developer, and seeking legal advice before signing can protect your interests and ensure you receive fair compensation.