How to Plan a Home Extension: 5 Steps Every Homeowner Should Follow

Planning a home extension is one of the most effective ways to add value, space, and style to your property. Whether you're dreaming of a spacious kitchen-diner, a rear extension with bi-fold doors, or an additional bedroom, the process can feel overwhelming without a clear roadmap. Here's a simple 5-step guide to help homeowners in London, Kent, and beyond plan a successful extension project.

1. Define Your Goals and Budget Start by asking yourself what you want to achieve. Is it more living space? Better natural light? An open-plan layout? Your vision will influence everything from layout to materials.

Set a realistic budget and include a contingency (usually 10-15%) for unexpected costs. Knowing what you're willing to spend keeps your project on track.

2. Understand What Permissions You Need Not all home extensions require planning permission. Under Permitted Development Rights, certain extensions are allowed without formal approval. However, this depends on size, location, and your local authority.

Always check with your local planning department or consult your contractor. If you're in Dartford, Gravesend, Sidcup, Maidstone or surrounding areas, our team is happy to advise.

3. Hire the Right Contractor Early Working with a reputable, experienced builder can save you time, stress, and money. Look for companies with:

• Experience in similar extension projects
• Transparent quotes
• Strong local reviews

At Mastercraft Building Contractors Ltd, we manage the full process: design, build, and finish.

4. Finalise Design and Structural Plans Work with your contractor or an architect to translate your vision into detailed drawings. This includes structural engineering calculations and building regulations compliance.

Ensure everything is signed off before work begins. This avoids costly mid-project changes.

5. Plan the Build Timeline and Logistics Extensions can take anywhere from 8 to 16 weeks depending on complexity. Make arrangements for site access, skip hire, and day-to-day disruption.

Your builder should provide a clear timeline and update you regularly. Communication is key to a smooth experience.

Thinking of Extending in South East London or Kent? We specialise in rear, side, and wraparound extensions across:

• South East London: Bexleyheath, Eltham, Sidcup, Plumstead, Blackheath, Abbey Wood
• North West Kent: Dartford, Gravesend, Greenhithe, Longfield, Crayford
• Mid Kent: Maidstone, Chatham, Rochester, Gillingham, West Malling

Contact us for a free site visit and no-obligation quote.

‍