Conservatory Cost Calculator
Your Estimated Cost
Cost Breakdown
What’s Included
Your estimate includes the conservatory structure, frame, glazing, roof, doors, and fitting. Labour costs typically account for 30-40% of the total price. Additional groundwork, building regulation fees, or complex site preparations may increase costs.
How to Use This Calculator
Getting an accurate estimate for your conservatory project is straightforward with our calculator. Start by selecting the style that suits your home best. Lean-to designs work brilliantly for bungalows and smaller properties, whilst Victorian and Edwardian styles suit period homes beautifully.
Next, adjust the width and length sliders to match your desired dimensions. Remember, most conservatories don’t require planning permission if they’re under 30 square metres and don’t extend beyond certain limits. Choose your preferred materials – uPVC offers excellent value, aluminium provides a sleek modern look, and timber brings traditional charm.
The roof type significantly impacts both cost and comfort. Polycarbonate is budget-friendly but can be noisy in rain. Glass roofs create a bright, airy space, whilst solid tiled roofs offer superior insulation and make the conservatory usable year-round. Tick any additional features you’d like, then hit calculate to see your personalised estimate.
Conservatory Styles Compared
| Style | Best For | Starting Price | Key Feature |
|---|---|---|---|
| Lean-To | Bungalows, small spaces | £9,000 | Simple, cost-effective |
| Victorian | Period properties | £12,000 | Curved bay front |
| Edwardian | Maximum floor space | £11,000 | Square, practical |
| Gable-End | Statement design | £14,000 | High apex roof |
| P-Shape | Large gardens | £18,000 | Combined styles |
| Orangery | Luxury extension | £20,000 | Brick pillars, flat roof |
What Affects Your Conservatory Price?
Size Matters Most
The dimensions of your conservatory are the biggest cost factor. A modest 3m x 3m structure gives you 9 square metres of space, perfect for a dining area or garden room. Larger conservatories measuring 4m x 5m provide 20 square metres, enough for a spacious living area or home office. Every extra square metre adds approximately £1,300-£1,800 to your total, depending on materials.
Material Choices
uPVC frames remain the most popular choice, offering durability and low maintenance at competitive prices. Aluminium frames cost 20-30% more but deliver slim sightlines and a contemporary aesthetic. Timber frames, whilst requiring more upkeep, provide authentic period character and excellent insulation properties.
Roof Selection
Your roof choice dramatically affects both initial cost and long-term comfort. Polycarbonate roofs start from £2,500 but can overheat in summer and feel cold in winter. Glass roofs cost £4,000-£6,000 and maintain comfortable temperatures better. Solid tiled roofs, priced at £5,000-£8,000, transform your conservatory into a true year-round living space with proper insulation.
Planning Permission & Building Regulations
Most conservatory projects fall under permitted development rights, meaning you won’t need formal planning permission. However, your conservatory must meet specific criteria: it shouldn’t cover more than 50% of your garden, must be single-storey, and shouldn’t extend beyond 3 metres from the rear wall (4 metres for a detached house).
Building regulations approval is mandatory for all conservatories. This covers structural integrity, foundations, glazing safety, and thermal efficiency. Your installer typically arranges this, with costs around £400-£800 included in most quotes. Listed buildings and conservation areas have additional restrictions requiring council approval before starting work.
Frequently Asked Questions
Common Pricing Mistakes to Avoid
Forgetting About Groundwork
Many homeowners focus solely on the conservatory structure and overlook foundation costs. If you don’t have a suitable existing base, expect to pay £2,500-£6,500 for groundwork, including excavation, concrete base, damp-proof membrane, and dwarf wall construction. Sites with poor drainage, slopes, or difficult access increase these costs considerably.
Skimping on the Roof
Choosing a cheap polycarbonate roof might save £2,000-£3,000 initially, but you’ll likely regret it. Polycarbonate conservatories become saunas in summer and fridges in winter, limiting their usefulness to just a few months yearly. Investing in a proper glass or solid roof from the start means you’ll actually use your conservatory, making it worthwhile.
Ignoring Running Costs
A poorly insulated conservatory costs hundreds extra annually in heating bills if you attempt to use it year-round. Triple glazing, proper roof insulation, and thermal breaks in frames cost more upfront but pay for themselves within 5-7 years through energy savings. Factor in these long-term costs when comparing quotes.
Not Getting Multiple Quotes
Conservatory prices vary wildly between suppliers. The same specification might cost £12,000 from one company and £18,000 from another. Always obtain at least three detailed quotes, checking exactly what’s included. Cheaper quotes sometimes exclude crucial elements like building regulations fees, electrics, or finishing touches.
Maximising Your Investment
Think carefully about how you’ll use your conservatory before finalising the design. A dining area needs good access to the kitchen and enough space for a table and chairs to move comfortably. Home offices require electrical sockets, network points, and perhaps built-in storage. Family rooms benefit from robust flooring and heating.
Consider future needs too. That cosy 3x3m conservatory might feel cramped once children arrive or when elderly relatives need accessible ground-floor space. Slightly larger dimensions now cost less than extending or rebuilding later. Position doors thoughtfully to create natural traffic flow through your home.
Quality matters more than size. A smaller conservatory with excellent glazing, proper insulation, and a solid roof serves you better than a large draughty space you rarely use. Prioritise thermal efficiency, especially if you’re in northern regions or exposed locations where weather conditions are harsher.