Very less accuracy in housing price prediction using neural networks

[nikki.nikitaagarwal01 (NIKITA AGARWAL)]

In house price prediction challenge,on using label encoder,I got max accuracy of 53 and 47 % on using one hot encoding.How can I get better accuracy

This is the link for both the codes
https://drive.google.com/drive/folders/1KQSSO8bhpUzwaDTCRrcIqFXCz25kMiZ_?usp=sharing