House Extensions in Petersfield: Planning, Costs & Design Ideas for 2026

Adding space to your home is one of the biggest investments you'll make — and in Petersfield, with property prices continuing to rise, extending often makes more financial sense than moving.

Why Extend in Petersfield?

The average house extension in Hampshire adds between 10-20% to your property value. For a typical Petersfield home worth £500,000, that's £50,000-£100,000 in added value — often more than the cost of the build itself.

Types of House Extensions

### Single Storey Rear Extensions The most popular choice in Petersfield. Typically used to create open-plan kitchen diners, these extensions can often be built under Permitted Development (no planning permission required) if they meet certain criteria.

**Typical cost:** £1,500-£2,500 per square metre **Timeline:** 8-12 weeks

### Double Storey Extensions If you need bedrooms as well as living space, going up makes sense. More complex planning considerations, but often better value per square metre.

**Typical cost:** £1,200-£2,000 per square metre **Timeline:** 12-16 weeks

### Side Return Extensions Perfect for Victorian and Edwardian terraces in Petersfield town centre. Utilises the narrow alleyway alongside your kitchen.

**Typical cost:** £30,000-£60,000 **Timeline:** 6-10 weeks

### Wrap-Around Extensions Combines rear and side extensions for maximum space. Popular with growing families in the Petersfield area.

Planning Permission in Petersfield

Petersfield falls under East Hampshire District Council, and parts of the town are within the South Downs National Park — which means stricter planning rules.

**Permitted Development:** Many single storey extensions don't need planning permission if they: - Don't extend more than 3m (semi-detached) or 4m (detached) from the original rear wall - Don't exceed 4m in height - Don't cover more than 50% of the garden

**South Downs National Park:** If your property is within the Park boundary, Permitted Development rights are more restricted. Always check before starting.

Choosing a Builder in Petersfield

Look for: - Local experience (they'll know the planning quirks) - Fixed-price quotes (no surprises) - In-house design services (single point of contact) - Examples of work in the Petersfield area

**[Petersfield Design & Build](https://petersfielddesignandbuild.co.uk)** offers free consultations at their Petersfield office or at your home. With 15+ years of experience and 100% planning approval rate, they manage the entire process from initial design to final handover.

What's Included in a Good Quote?

A proper design & build quote should include: - Architectural drawings - Planning application (if needed) - Building regulations - Structural calculations - All construction work - Electrics and plumbing - Plastering and decoration - Project management

Beware of quotes that exclude key items — they'll add up later.

Ready to Extend?

Book a free consultation with a local design & build company to discuss your options. The best time to start planning is now — most reputable builders are booked 2-3 months ahead.