office lease: help "option to renew??"

Don't know if I'm being stupid here but what's the difference between having a tenancy agreement for 2 years which expires normally and one which has an option to renew after 2 years at market value?

'option to renew at market value' is coming into the picture where you cannot or don't want to agree on the of the renewable 2 years price per sqf, in some cases a landlord may say :

45hkd per sqf exclusive for the first 2 years and 50hkd for the remaining 2 years, where you may think that in 2 years time it may be more or less, if you think it will be more, then obviously you should go for it if you think it would be less, then 'at market value' may be in your favor, but since you are going for 2 years, this is basically irrelevant and you got nothing to worry about.

Feel free to send me a private message if you would like to discuss further, I'm an expat property who lives in hong kong for 10 years and knowledgeable in those topics.


Cheers.