The essay prompt is talking about old buildings in general. There was no reference to historical buildings and UNESCO Heritage Sites. Whatever gave you the impression that you should be discussing these buildings in this essay, which are protected buildings and as such have a restoration, renovation, and maintenance budget every year ? The discussion refers to simple buildings that were built in the olden times. For example, a 6 storey walk-up building , that does not have any historical significance and was built in 1973 (20th century) would be too expensive to maintain and repair in the 21st century. While still usable, such a building requires heavy maintenance costs because of the need to upgrade the building to modern architectural and safety standards. Do you think that type of building needs to be maintained? Or would it be better to build a new building in its place instead? Remember, historical buildings will never be in danger of going decrepit and the fact that the building is obsolete has no relation to its maintenance budget and whether it will remain standing or not. Its historical significance will indicate it can never be torn down.  
  
Phrase number 2 that examiners hate reading: "will give my reasons below". This is considered to be a memorized phrase learned during IELTS lessons. Don't use it in practice tests so you won't use it during the actual test. Try to use a different sentence structure. You could instead say "Based on personal reasons, I have to strongly disagree with this statement." Or something similar. Just don't use memorized phrases in any part of the presentation.  
  
You only have 40 minutes to write this essay. You are constantly writing too many words. Don't go over 5 sentences per paragraph. You need to show the examiner that you can explain yourself clearly using less words. As long as you write between 250-290 words, you will be able to get the best possible score. Why? Consider that you will be able to double check your presentation by writing a median number of words. The focus is on the meaning of your paragraph and the speed by which you can explain yourself in English. Qualities an ESL student must display while in class. Write more than the advised word count and you will certainly be including irrelevant information in your essay. Something you have been doing ever since in your Task 2 writing tasks.  
  
"These" is the plural form of "this". in the noun phrase "this building attaches", your previous reference is for the plural form of buildings so use "these", not "this". That presentation represents a noun phrase disagreement.  
  
I owe you a score from your previous essay. Let me score this one instead. Your writing skills in this essay could pull in a 4.5 It was the TA section that severely pulled down your score. It was caused by your reference to UNESCO and world heritage buildings and historical buildings in Vietnam within your discussion. Topics which were not related to the task being discussed. The topic was partially addressed in the sense that you responded correctly to the question posed. However, the response is leaning more on the tangential side. The concluding summary is incomplete in summarized information presentation. You still need 3-5 sentences there. Imagine that, even though you kept on writing, you still missed out on some scoring requirements. All because you focused on the number of words instead of quality of the presentation and required formatting elements.  
  
Your grammar does not show any extreme grammar errors. You still have imperfect grammatical presentations but these do not affect the meaning and understanding of your sentences in relation to the paragraph. Good job ! Your GRA scores benefited from your ability to use complex and simple sentences along with proper punctuation usage.  
  
However, the wordiness of your essay shows that you are unable to explain yourself in concise English terms. You over explain in the essay, which could be a problem for you during the actual test. Use a timer, make sure you write within the 40 minute time limit. That includes review and editing time. If you can't do it, repeat the writing the essay. Keep repeating the essay until you write, review, and edit within 40 minutes. Then you can say that you are capable of writing an essay within the time frame. How well you wrote, is what I will be assessing for you.