Thrushcross Grange is a very classy, civilised estate and living in a place like this would bring a lot of status with it. It is quite a sheltered place down in the valley and this is something that is common with its children - they tend to be sheltered and spoilt.
Thrushcross grange is comfortable and decorative whereas Wuthering Heights is basic and down to earth. Whilst Wuthering Heights has great power in its commanding position up on the hill, it will never be in the same class as the Grange.
The features of the estates have a strong association with the people who live in them in terms of mood, emotion and appearance.
Heathcliff is a very dark and stormy character of Gypsy blood and is the person who has the greatest association with Wuthering Heights. Mr Earnshaw who found him alone and starving introduced him to the place as a child where he grew up with Catherine and Hindley as an interloper. In adulthood he becomes more and more antisocial and puts up a stone barrier when it comes to showing his emotions. He and the building suit each other as though they were one and the same because whilst he displays all the strength and pride of the Heights, he also has the roughness.
Isabella is Edgar Linton’s sister and although being a pleasant, well-educated person has the soft and civilised traits of Thrushcross Grange. Heathcliff marries her as a way of revenge against Cathy and Edgar and as part of his overall plan to own both estates. Not realising Heathcliffs intentions she is taken in by his magnetism and strength but is too soft a character to stand up to his might and soulless oppression.
Linton is Isabella and Heathcliffs son and he seems to represent the worst qualities of both places and people. He has the unpleasant and devious side of the Heights and Heathcliff and the weak, feeble and spoilt side of the Grange and Isabella, all of which make him a thoroughly wretched character.
Although being brought up in Wuthering Heights, Catherine was tempted away by the luxury and status of living at Thrushcross Grange. She has a good and a bad side to her, which can be associated with Wuthering Heights. In her childhood she displayed the strength of the place in her strong will but exhibited its failings when she put feeling aside and married Edgar. She admits to Nellie that she has no feelings for him and that she loves Heathcliff but the allure of Thrushcross Grange is too great.
Edgar grew up with his sister Isabella and is fair, well educated and quite the opposite of Heathcliff. If Heathcliff represents the Heights then Edgar represents the Grange in that he is civilised yet sheltered and quite dull. He has genuine feelings for Catherine but is easily manipulated by her and is too soft to control her heart and soul.
Cathy is the Daughter of Edgar and Catherine and she inherits all the good qualities of her parents and therefore represents the best of both worlds. She has the strength and high spirits of her mother as well as the mildness and sensitivity of her father so she exhibits the better traits associated with the two estates.
Hareton was born amidst the savagery of Wuthering Heights and despite being the rightful heir to the place and potentially being quite an important person had an upbringing of neglect and is cheated out of his rightful position. Raised mostly by Joseph and Heathcliff he is brought up to be quite hard but at the same time has strong working class principles that make him stronger than Heathcliff. He has Picked up on Josephs religious influence but actually practices being righteous instead of preaching it. He resembles everything that is good about the Heights with no influence from the Grange.
Both of the grange children were exposed to the dark side of the heights children. Edgar married Catherine not realising she was only doing it for her own shallow reasons. Isabella married Heathcliff thinking he had become a gentleman in the time he was away but instead he had planned his revenge and was focused on how to destroy both families.
Looking at the good and bad qualities of both the places and the characters Cathy seems to have the best qualities of both places whilst Linton has the worst of both.
Cathy has the best qualities of both places and is associated with thrushcross Grange. Hareton has the strength of and is associated with Wuthering Heights.
Heathcliff and Catherine find the middle ground between the two places in the afterlife on the moors, the heavenly place that they are both happiest.
With the union of Cathy and Hareton, the barriers of class are finally broken and the two incompatible worlds of Thrushcross Grange and Wuthering Heights blend together in harmony. They achieve in life what Heathcliff and Catherine can only achieve in death.