Conservatory costs in the UK can move quickly once the job becomes more than a simple glazed room. Roof type, base work, glazing, insulation, doors, drainage, heating and the connection into the existing house can all change the number.
If you already have drawings, sizes or a specification, you can upload your plans so the estimate is based on the actual scope rather than a broad square metre allowance.
Use this guide as an early benchmark. It should help you compare glass-roof conservatories, tiled-roof designs and orangeries before you start collecting prices. If the layout, specification or house connection is still changing, tighten that scope before relying too heavily on rough averages.
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If the roof type, glazing, base, insulation or connection into the house is still undecided, a rough average can hide too much. The estimate needs to show what has actually been allowed for.
Use Request a Quote if you want the project reviewed properly. Use Quick Quote when the scope is already clear and you want to book the estimating work in.
Quick Conservatory Cost Summary
| Type | Typical budget range | What tends to push cost up |
|---|---|---|
| Glass-roof conservatory | Usually the lighter-spec benchmark option, but high glazing specs can still move quickly. | Door sets, frame quality, glazing upgrades, heating and base work. |
| Tiled-roof conservatory | Often higher than basic glazed options once insulation and roof build-up improve. | Roof structure, insulation target, windows/doors and knock-through work. |
| Orangery | Usually the highest budget route, especially where it starts behaving more like an extension. | Brickwork, lanterns, steelwork, internal finishes and integration with the main house. |
Before you compare quotes, it also helps to decide whether you are pricing a simple conservatory, a heavier orangery build or something that is starting to overlap with extension-style compliance and build-up costs.
Contents
- Types of Conservatories and Their Costs
- What Determines the Price of a Conservatory?
- Breaking Down Conservatory Costs by Construction Stage
- Additional Costs and Considerations
- Calculator
- Frequently Asked Questions
Types of conservatories and their costs
The type of conservatory matters because it changes the structure, roof build-up, glazing, base work and how much the new space behaves like an extension.
A light glass-roof conservatory may be simpler to install, but the cost can still move if the glazing specification, doors, heating or base work increase. A tiled-roof conservatory usually needs more allowance for structure, insulation and roof detailing. An orangery often carries the highest budget because it brings in more brickwork, heavier roof detailing, lanterns, internal finishes and a closer connection to the main house.
The important point is not just what the conservatory is called. It is what the quote includes.
1. Glass-roof conservatory
A glass-roof conservatory is usually the lighter benchmark option, but the cost still depends on the glazing specification, frame quality, doors, base work, heating and whether the existing house needs alteration.
2. Tiled-roof conservatory
A tiled-roof conservatory normally needs a higher allowance for roof structure, insulation, covering, rainwater details and internal finishing. It can be more usable year-round, but that improvement usually comes from a more involved build-up.
3. Orangery
An orangery often sits closer to extension territory. Brickwork, lanterns, steelwork, internal finishes and the connection into the existing house can all push the cost beyond a basic conservatory allowance.
What Determines the Price of a Conservatory?
Several factors affect the cost of a conservatory, from materials to location. Here’s a breakdown of what you might expect to pay for each type.
Glass-Roof Conservatory Costs
A standard 12 square metre glass-roof conservatory typically costs between £32,000 and £42,000, averaging around £3,000 per square metre, depending on your location and specifications.
Tiled Roof Conservatory Costs
This sturdier option generally costs between £19,000 and £26,000, or roughly £1,800 per square metre. Tiled roofs offer enhanced insulation, which can be beneficial in colder areas.
Orangery Costs
Orangeries blend substantial building materials with large windows, typically ranging from £34,000 to £47,000, or approximately £3,300 per square metre. They are known for their longevity and seamless integration with traditional house structures.
Breaking Down Conservatory Costs by Construction Stage
To give you an idea of where your money goes, here’s a cost breakdown based on a glass-roof conservatory project in London:
- Roof and Structural Work: About 45% of the total cost, covering materials and installation.
- Windows and Doors: Approximately 25%, impacting both appearance and insulation.
- Foundations: Around 9%, essential for long-term stability and durability.
If you are comparing options at the early planning stage, it helps to look beyond the shell price alone. Specification creep, energy upgrades, rooflight choices and the way the new space connects into the rest of the house can move the budget more than people expect. Related guides on glazing-led cost creep, energy-upgrade allowances and wider renovation budgeting help put those extras into context.
Additional Costs and Considerations
Remember that these estimates typically exclude VAT, as well as additional costs for optional features like heating, bespoke designs, or unexpected groundwork. Additionally, planning permission might be required depending on your local council’s regulations, so be sure to factor in any fees related to permits or inspections.
Calculator
Use our cost calculator below to get a tailored estimate for building your conservatory, based on your specific requirements and preferences. Simply enter the size, type, and additional features you’re interested in, and our calculator will estimate to help you budget effectively.
If you reach the point where drawings, openings into the main house or structural details are affecting the budget, review what drawings are usually needed for a building estimate and use like-for-like quote comparison before choosing between builders.
Frequently Asked Questions
Can conservatories be used year-round?
Yes, conservatories can be enjoyed year-round with the right insulation, heating, and cooling solutions. Key features like a tiled or solid roof help regulate temperatures, keeping the conservatory warm in winter and cooler in summer. Double or triple-glazed energy-efficient windows prevent heat loss in cold weather and reduce solar gain in warmer months. You may also consider options like underfloor heating or electric radiators, which are effective and affordable ways to create a comfortable year-round space.
Is it cheaper to build a conservatory or an extension?
Generally, conservatories are more cost-effective than full extensions due to simpler structures and fewer materials. A standard conservatory typically ranges between £9,000 to £20,000, while extensions often start at £25,000 and can go much higher depending on specifications. However, the cost can overlap if the conservatory includes high-end customisations or advanced insulation. Extensions, being fully integrated with your home, tend to add more usable space and may offer a greater return on investment, but conservatories are an excellent alternative for those looking to increase space and light without a major expense.
How long does it take to build a conservatory?
On average, building a conservatory takes between three to six weeks. The timeline can vary based on factors like the complexity of the design, site conditions, weather, and whether the conservatory requires additional groundwork. For simpler builds, such as a small lean-to conservatory, the process may be completed in as little as two to three weeks. More complex or custom designs may take closer to six weeks or longer, especially if unexpected delays arise. Planning ahead and choosing experienced professionals can help keep your project on schedule.
Do conservatories add value to a property?
Yes, conservatories can boost your property’s value by up to 7%, according to property experts. Buyers are often drawn to the added space and light that conservatories provide, making them an attractive feature when selling. While value-added can depend on factors like location, quality of construction, and how well the conservatory integrates with the existing property, it remains a popular way to enhance appeal without a full extension. For maximum impact, consider design elements that complement the style and size of your home.
Is there a best time of year to build a conservatory?
Spring and summer are generally the best times to build a conservatory. Warmer, drier weather reduces the chances of weather-related delays, allowing contractors to work efficiently. This can mean a faster turnaround and fewer interruptions. That said, autumn can also be a good choice if you want to avoid peak construction periods, as many builders may have greater availability. Winter is usually the least ideal time due to potential weather issues, which can delay projects, though you may be able to find competitive rates during this period.
What maintenance does a conservatory require?
Conservatories are relatively low-maintenance, but they do benefit from regular upkeep. Routine cleaning of windows and roof panels helps maintain clarity and prevents algae or debris buildup. Check for any signs of wear and tear, such as leaks or condensation, particularly after winter. Cleaning gutters regularly is important to prevent blockages and avoid water damage. If your conservatory has a uPVC frame, wiping it down with a mild cleaner helps preserve its appearance, while wood frames may require occasional repainting or sealing to protect against weather damage.
Do I need an architect for a conservatory?
Hiring an architect for a conservatory isn’t usually necessary unless you have specific design requirements. However, for bespoke designs or complex builds, consulting an architect can ensure the structure integrates well with your home and complies with building regulations.
For accurate budgeting, try our cost calculators available here or for a full building estimate for your project, feel free to reach out to us below:
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