Orangery vs Conservatory: Complete Guide in New Forest

An orangery sits between a conservatory and a full extension. It has solid walls with large windows and a flat roof with a central lantern — giving it more presence and year-round usability than a conservatory, at a lower cost than a brick-built extension. Here is what New Forest homeowners — covered by New Forest District Council — need to know about costs, planning, and timelines.

Local cost range — New Forest

£2,000–£3,000/m²

New Forest properties — especially those inside the National Park — require premium natural materials to comply with NFNPA design guidelines. Expect 10–20% higher build costs than the Dorset average.

Orangery vs Conservatory: Complete Guide rules in New Forest

New Forest falls under New Forest District Council (New Forest District Council). Much of the New Forest falls within the New Forest National Park, which has its own planning authority (NFNPA). Properties inside the National Park have significantly reduced Permitted Development rights. Properties outside the park boundary but within the district follow standard PD rules.

Planning applications (annual)

~2,500

Average decision time

8 weeks

National Park coverage

Significant

Approval rate

~85%

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What you need to know

Orangery vs conservatory vs extension

A conservatory is mostly glass (75%+ glazed roof and walls). An orangery has solid brick or rendered walls with large windows and a flat roof with a glazed lantern. A full extension is entirely solid construction. Orangeries look more substantial than conservatories and are warmer in winter and cooler in summer.

Design and materials

Modern orangeries typically use brick or rendered columns with aluminium bi-fold doors and a flat roof with a central roof lantern. The solid perimeter walls allow for better insulation than a conservatory, making the space comfortable year-round without excessive heating costs.

How much does it cost in New Forest?

Local New Forest rates: £2,000–£3,000/m². The table below shows national Dorset figures for reference.

ItemTypical Cost Range
Small orangery (12–16m²)£30,000–£50,000
Medium orangery (16–25m²)£45,000–£70,000
Large orangery (25–35m²)£65,000–£100,000
Roof lantern£3,000–£8,000
Professional fees£2,000–£4,000

Prices based on Dorset rates, 2026. Local New Forest range: £2,000–£3,000/m².

Planning permission in New Forest

Orangeries usually fall under Permitted Development as they are structurally similar to a single-storey extension. Standard PD rules apply — 4m/8m depth limits, height restrictions, and boundary conditions. In conservation areas, the solid walls and flat roof are often more acceptable than a glazed conservatory.

Standard single-storey extension PD rules apply. The 75% glazed roof rule that distinguishes conservatories from extensions under Building Regulations does not affect PD — it affects whether Building Regulations apply.

New Forest District Council — local planning context

Much of the New Forest falls within the New Forest National Park, which has its own planning authority (NFNPA). Properties inside the National Park have significantly reduced Permitted Development rights. Properties outside the park boundary but within the district follow standard PD rules.

New Forest District Council processes approximately ~2,500 planning applications per year, with an approval rate of ~85%. Average decision time is 8 weeks.

Building regulations

If less than 75% of the roof and 50% of the walls are glazed, Building Regulations apply in full (same as a standard extension). Most orangeries fall into this category. If the glazing thresholds are exceeded, a thermal separation (door between house and orangery) may be required.

Typical timeline

PhaseDuration
Design2–3 weeks
Build8–14 weeks

Frequently asked questions

Orangery vs Conservatory: Complete Guide in other areas

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