If you are purchasing a residential property directly from the developer then the sale and purchase agreement to be utilize is already statutorily fixed, Schedule H of the Housing Development Act. Nothing can be amended from there unless consent from the housing authority is obtained and usually the only clause that gets amended is the time for delivery of vacant possession.

Trying to amend the Schedule H is like trying to amend the law. Thus, nothing illegal here because it is done according to the law.

Unless you are purchasing a property through a sub-sale transaction then it would be absolute bollocks if the solicitors told you the agreement cannot be amended but still it cannot be termed illegal. It's just lazy. There's currently no law now to impose an obligation for solicitors to MUST amend sub-sale agreements and this is in line with the century old concept of "freedom to contract".

Bear in mind that the solicitors attending to your execution of the Sale and Purchase Agreement is NOT REPRESENTING YOU. They are representing the developer and assisting you. Ever wonder why developer bears your legal fees for the transaction?

If at all, the solicitor's duty lies with the developer.

Ah! if the amendment in which you seek is not on the terms or conditions and only on the particulars of the master title itself then i do not see the rationale behind the rejection.

Anyway, when was the lease renewed? was it before or after you have executed the Sale and Purchase Agreement?

These "other buyers" you said, are they engaged in the same solicitors' firm as you? If yes then question the solicitor why was yours rejected. If the solicitor cannot give you a compelling reason and is merely telling you "cannot" then probably you need to tell the solicitor that you'll bring this matter to the developer and perhaps the developer can give you a satisfactory answer.

FYI, the amendment of the renewed lease period may not be material but if you are going for the sake of accuracy then by all means because the standard schedule H states that you will be purchasing the property with all express/implied conditions that will be tied to it.

like i said, it won't affect your rights as the beneficial owner to the particular parcel but if you're super particular when it comes to details like it then you may bring it to the developer and make it an issue but this will cause significant difficulties in the future when you want to deal with this solicitor.