Thanks for your question.
Can I check I have understood correctly that on the house you own now you want to remortgage it with a buy to let?
If this is the case why does your husband need to be on the deeds/mortgage? A buy to let is calculated by the potential rental income. If his name must go on the deeds then you will need to do a nil consideration transfer from you to you and your husband - there is no Sdlt on such a transfer.
I can chat this through with you on the phone if you wish?
If it is necessary to do it to get a mortgage then it is possible you do it.
As mentioned above the transfer would be from you to you and husband. This is done on standard land registry form TR1. You can both own as joint tenants or tenants in common. There is a distinction between the two. As you bought the flat and all the equity in it is yours you may want to protect that. Joint tenants own the whole jointly. Tenants in common own separate distinct shares. This can be 50/50 or some other proportion. You need to state this on the TR1. If you go for tenants in common in unequal shares you will need to enter into a declaration of trust to record this.
The transfer can be for a nominal amount.
Your husband's name needs to be on the title if it is to be on the mortgage.
A solicitor can do the transfer/declaration of trust.
Do note that your subsequent purchase will be subject to the additional 3% Sdlt surcharge as it will be a second home. This rule came in April this year. You can find a Sdlt calculator online to work out the Sdlt with the surcharge on the price of your intended purchase.
I hope this helps.
Do let me know if you have any further queries.
If not please can I ask you to leave a positive rating so that I receive credit for helping you.
Nominal means £0 or £1 or other small amount.