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French, sliding, bi-fold - which doors are right for your extension?

3 min read
Feb '26 • by Heather

Quick summary

The right door depends on your space and budget. French doors are traditional and good for natural light, generally costing around £1,200 to £3,000 for a standard size. Sliding doors are space-efficient and cost from about £1,500 to £4,000, ideal for larger openings. Bi-folds are popular but more expensive, typically £3,000 to £8,000, and take up space when open. Choose based on your available area, style preference, and budget constraints.

Think doors are boring? Think again! If you’re undertaking a rear, side, or wraparound extension, doors can transform your entire household. Far more than just a simple gateway to the outside, the options on offer allow you to bring more light into your home, as well as creating a real WOW factor for future buyers.

Let’s see what’s on offer...

cunningham place 3 large

French doors

Starting with the most traditional option, french doors bring a classic touch to any home.

French doors are mainly categorised by opening on a hinge, rather than a sliding mechanism like patio doors. This gives a traditionalist touch, which can enhance the charm of period properties, or add character to new builds.

If you’re looking for more natural light into your home, but want to avoid extensive panes of glass for privacy reasons, then french doors would make an excellent choice.