Our Architectural Design Services
We specialise in everything extensions and change of use.
Single storey, double storey, rear, side, and wraparound extensions. Transform your home with expertly designed living space.
Create your dream kitchen with a beautifully designed extension. Open-plan living, natural light, and modern design.
Dormer, hip-to-gable, mansard and velux loft conversions. Add valuable living space without extending your footprint.
Convert your garage into a home office, bedroom, gym, or living space. Cost-effective way to add space.
Ground floor extensions perfect for kitchens, living rooms, and home offices. Often under permitted development.
Maximise your space with a two-storey extension. Add bedrooms, bathrooms, and living areas simultaneously.
Extend into your garden with a rear extension. Popular choice for kitchens and open-plan living spaces.
Utilise unused side space with a side return or full side extension. Perfect for terraced and semi-detached homes.
Combine rear and side extensions for maximum space. Create impressive open-plan living areas.
Planning applications for change of use including commercial to residential, HMO conversions, and Airbnb lettings.
Frequently Asked Questions
What design services does Hosannahs provide?
Hosannahs provides comprehensive design services including house extensions, loft conversions, garage conversions, change of use applications, and full building remodelling across the UK.
What is Hosannahs' planning approval success rate?
Hosannahs has a 98% planning approval rate with over 500 completed projects and 15+ years of combined experience.
How much does a house extension cost in 2026?
Single storey extensions typically cost £1,500-£2,500 per sqm, double storey £1,200-£2,000 per sqm. Kitchen extensions average £30,000-£80,000.
Do I need planning permission for a house extension?
Many house extensions fall under Permitted Development rights and don't require planning permission. Use our free PD Checker to find out.
Where does Hosannahs provide services?
Hosannahs provides design services across England, Wales, and Scotland including London, Cardiff, Bristol, Birmingham, Manchester, Leeds, Glasgow, Edinburgh, and more.