Loft conversion: A loft conversion could add up to 20% value to your home.

Extension:  Extensions and conversions can add up to 20% value to your home. 

Driveway: Installing a new driveway can add 5-10% to the value of your home. 

Solar panels: Installing solar panels can increase your property value by between 14% and 38%. 

Double glazing: Double or triple glazing is becoming a non-negotiable for homebuyers. It saves on bills, increases the value of your property, and helps with noise reduction.

Garden landscaping: An attractive garden can increase your property price by up to 10%, especially in cities.

Kitchen renovation: Upgrading your kitchen is a good way to add up to 10% value to your home.

Bathroom installation: Installing a new bathroom can increase the value of your home by 5%. 

Wet room installation: Wet rooms are becoming increasingly popular and can add up to 5% value to your home. 

Repairs and restorations: Restoring original features can add up to 30% of your property’s value, especially for period properties.

Redecorating: Redecorating your house with light and bright colors can make the rooms look bigger and more appealing to potential buyers. Adding features like fireplaces, bay windows, and new staircases can also add value.

Upgrading internal doors: Upgrading your internal doors can make your home look more modern and appealing to potential buyers.

https://www.checkatrade.com/blog/how-to/add-value-to-your-home/