Thank you for your question
My name is Clare
I shall do my best to help you but I need some further informtaion first
How much has he paid each month?
How much was the mortgage?
How much is the house worth now and how much is outstanding on the mortgage?
What is the ongoing mortgage payment - and what is the going rental for houses of that size in your area?
Has he paid towards any improvements to the property?
What other joint assets are there?
What has he paid for and how much has it improved the value of the house?
What work was done in the garden?
Has that really increased the value of the property?
I am afraid that he does have a financial claim on the property given the fact that he has contributed so much towards the household budget which has allowed you to make overpayments on the mortgage.
He may also have a claim arising out of the landscaping he funded - but that is less clear unless he obtains confirmation that the work that he has funded has enhanced the value of the property
However these are financial claims and do not give him the right to live in the property - and they certainly do not amount to a 50/50 split or anything close.
If you wish him to leave you need to give him "reasonable written Notice to leave " - at least two months in your case - and at the end of that time you can change the locks.
It would be sensible given the fact that you have a child together to discuss his moving out - and whether he will accept a larger share of the joint assets in lieu of his claim on your property - using Family mediation
I hope that this is of assistance - please ask if you need further details
You are most welcome - I hope all goes well