Collective Enfranchisement is usually more costly than RTM, as you are purchasing the Freehold asset.
Leasehold Reform Housing & Urban Development Act 1993 allows eligible leaseholders as a collective to purchase the Freehold. The premium paid is either negotiated directly with the Freeholder or calculated by the formula in accordance with the act.
Similar to RTM, there is a procedure and associated qualifications. In some cases, DMS would recommend enfranchisement, especially if the term left on the lease is near 80 years.
If you require no obligation advice, feel free to contact DMS and we will be happy to help.