There are two types of property ownership in Kenya.
This is a 100% ownership of property (land), the only thing you will be paying is the Council Tax, which you can get the details from your local Council Office.
This is normally a property (land), owned by government, companies or individuals who then lease the property (land) from 99 years up to 9999 years to the purchaser, for this type of ownership, the purchaser will be paying annual Land Rates and the Council Tax. You can get the details from your local Lands Office and your Local Council Office.
This is a government tax, which is normally 4% of the purchasing price normally paid by the purchaser together with the legal fees according to your solicitors or lawyers charges.
Before signing any agreement, both the buyer and the Vendor should seek legal advice and the buyers solicitor should carry out a thorough search of the property at the Lands and the Council Office to make sure it is clear from any encumbrance's before making any commitments.