Orangery vs Conservatory: Key Differences, Cost 2026 & Which to Choose
Solid roof with glass lantern vs fully glazed? Compare insulation, price, planning, and best use – plus 2026 cost tables.
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📊 Orangery vs Conservatory: Quick comparison 2026
| Feature | Orangery | Conservatory |
|---|---|---|
| Roof style | Solid flat/pitched roof with central glass lantern | Fully glazed roof (at least 75% glass, often 100%) |
| Wall structure | Brick pillars + large glazed panels | Mostly glass with optional dwarf walls |
| Insulation | High – solid roof + brick walls, year-round comfort | Moderate – modern solar glass helps, but less stable |
| Typical cost (4x4m, installed) | £35,000 – £65,000+ | £25,000 – £45,000+ |
| Planning permission | Often Permitted Development (size/height limits apply). Extra rules for listed/conservation areas. | |
| Build time | Longer (complex roof, brickwork) | Shorter (lighter frame, simpler glazing) |
| Best for | Year-round living, kitchen extension, home office | Sun lounge, garden room, casual dining |
| Property value added | 8–12% | 5–8% |
*Costs include groundwork, frame, roof, electrics, plastering, and VAT. Actual prices vary by size, material, and site conditions.
🏛️ What is an Orangery?
An orangery is a premium extension that blends solid construction with large windows and a roof lantern. Originally built to protect citrus trees, today’s orangeries feature a solid insulated roof (tiled or flat) with a central glass lantern that floods the room with natural light.
- ✅ Solid roof for year-round comfort
- ✅ Brick pillars – blends with house architecture
- ✅ Higher property value uplift
- ⚠️ More expensive and slower to build
🌿 What is a Conservatory?
A conservatory is a predominantly glass structure – typically a full glass roof and glass walls (or dwarf walls). It’s designed to maximise sunlight and garden views, creating a bright, airy space. Modern thermal glass improves temperature control.
- ✅ Uninterrupted natural light
- ✅ Quicker installation, lower cost
- ✅ Panoramic garden views
- ⚠️ Less temperature-stable than orangery
💰 Cost differences: Orangery vs Conservatory (2026 prices)
For a like-for-like footprint, orangeries typically cost 30–50% more due to the solid roof, brickwork, and deeper foundations. Below are realistic installed prices for a 16m² (4x4m) structure.
| Material | Conservatory (4x4m) | Orangery (4x4m) | Difference |
|---|---|---|---|
| uPVC | £25,000 – £35,000 | £35,000 – £50,000 | +£10k–£15k |
| Aluminium | £37,000 – £49,000 | £52,000 – £70,000 | +£15k–£21k |
| Hardwood / Timber | £44,000 – £58,000 | £60,000 – £85,000 | +£16k–£27k |
Why the difference? Orangeries require more structural engineering (solid roof support), brick pillars or full walls, and deeper foundations. Conservatories use lightweight frames and glass roofs, which are faster and cheaper to install.
📋 Planning permission & building regulations – what you need to know
Permitted Development rules for both: Most orangeries and conservatories fall under PD rights if they meet conditions:
- Not forward of the principal elevation
- Maximum height 4m (dual-pitch) or 3m (single-pitch)
- No higher than the highest part of the existing roof
- Not on designated land (conservation area, AONB, listed building) – then planning required
Building regulations: Required if you remove an external wall (open-plan), add heating, or exceed 30m². Our team handles all approvals.
🤔 Which one should you choose?
✅ Choose an Orangery if:
- You want a solid, year-round living space (kitchen, family room)
- Your home has period features that blend with brick pillars
- Budget allows 30–50% higher investment
- You need excellent insulation without relying on heating
✅ Choose a Conservatory if:
- You want a light-filled garden room or sun lounge
- You have a tighter budget and want maximum square footage for less
- You prefer a quicker installation (often 2–4 weeks shorter)
- You’re willing to use modern solar glass and blinds for temperature control
Still unsure? Let us help you decide.
Our design experts will listen to your needs, review your home’s architecture, and recommend the best option – with a fixed-price quote.
Speak to a specialist →📞 Call David on 01243 538999 for immediate advice
❓ Frequently asked questions
What is the main difference between an orangery and a conservatory?
Roof style is the biggest difference. An orangery has a solid roof with a central glass lantern (often tiled or flat). A conservatory has a fully glazed roof (at least 75% glass, often 100%).
Which is more expensive: an orangery or a conservatory?
Orangeries are typically 30–50% more expensive. For a 4x4m uPVC structure: conservatory £25k-35k, orangery £35k-50k. The solid roof, brick pillars, and deeper foundations drive the cost.
Does an orangery need planning permission?
Many orangeries fall under Permitted Development if they meet size/height rules. However, if you live in a listed building, conservation area, or the structure exceeds limits, planning permission is required. We handle this for you.
Which is better for year-round use?
An orangery is better for year-round use because the solid roof and brick walls provide superior insulation – warmer in winter, cooler in summer. Modern conservatories with solar-control glass are much improved but still less temperature-stable than an orangery.
Can I convert a conservatory into an orangery?
Yes – by replacing the glass roof with a solid insulated roof and adding brick pillars or walls. Budget around £12k–£20k depending on size. This upgrade dramatically improves insulation and can make a conservatory feel like a permanent extension.
Which adds more property value?
An orangery typically adds 8–12% to your home’s value, while a conservatory adds 5–8%. Buyers perceive orangeries as more “solid” and usable year-round, similar to a traditional extension.
Ready to extend your home with confidence?
Whether you choose an orangery or a conservatory, Room Outside delivers bespoke design, fixed pricing, and 50+ years of expertise.
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