Yes, welcome to home ownership. We spent probably £35K (with a lot more needed) on our first house and we had a 5% deposit not owning the whole house already.
Speak to a mortgage advisor, the calculations online give an idea but don’t really take into account risk factors such as age, self employed, childcare costs. A mortgage advisor will tell you what you can afford and get an agreement in principle. You’ll need that for any offer on a house to be accepted.
Get your house valued. Ask for local recommendations. Get 3 valuations and do your own research as to what is happening in the area. Pick an agent, declutter and clean the house top to bottom. They’ll come over and do photos, floor plan and start marketing the property. When you have an offer, you are proceedable for the property you want to buy. Some estate agents might not let you view their client’s house until you are in a position to proceed, some won’t mind.
Unless you have savings, you’ll need to use some of the sale money for costs. You’ll need conveyancing fees for the sale of your property, purchase of the new one, estate agent fees, potentially mortgage advisor fees (mortgage application fees are usually applied to your mortgage) and stamp duty. You will need savings for costa associated with the removals company or surveyor as you will pay those in advance of moving.
When you sell and have a property that has accepted your offer, you’ll need to wait until the chain is complete or someone breaks the chain. You’ll start the conveyancing process, you’ll need to answer any questions about your house and your conveyancers will do the same for your purchase. You will then (hopefully) exchange, at this point you have exchanged contracts and someone can only pull out of the sale by losing considerable amounts. When you complete, the money from your sale will be transferred directly to your solicitors, they will pay themselves, the estate agent, stamp duty and transfer the deposit to your mortgage company for the purchase of the new house. If you decide to keep some of your sale money back for work on the new house they will also transfer that to you.