Conservatories were one of the most popular home improvements of the 1990s and 2000s, and a lot of North London homes still have one attached to the back of the house. Whether adding one today genuinely adds value depends on how well it is built, how it is used, and what buyers in your specific area actually want to see. The honest answer is that a well-built conservatory can add value, but a poorly built or dated one can just as easily put buyers off.
What buyers actually respond to
Buyers generally respond well to extra usable space, but a conservatory only counts as usable space if it is comfortable year round. A conservatory that is too hot in summer and too cold in winter, which describes a lot of older single-glazed builds, is often viewed by buyers as a room that will need replacing rather than a genuine asset. Conservatories built to a higher specification, with proper insulation, double or triple glazed roof panels and a solid rather than fully glazed roof, are treated much more like a genuine extension and valued accordingly.
Build quality makes the difference
A conservatory built on a proper insulated foundation, with cavity walls up to window height and a well-insulated roof, will hold its value far better than a cheaper all-glass structure sitting on a slab with a low quality frame. Building regulations now require conservatories over a certain size, or those not meeting specific thermal separation and glazing standards, to comply with the same energy efficiency requirements as a standard extension. This has pushed the better end of the market towards what are sometimes called orangeries or garden rooms, which look and perform much closer to a proper extension.
When an extension makes more sense
If you want a room that works as genuine year-round living space, a solid-roofed single storey extension, or an orangery style build with a larger proportion of solid roof to glazing, is usually a better long term investment than a traditional conservatory. It will typically cost more upfront but performs better thermally, integrates more naturally with the rest of the house, and tends to be viewed by buyers as an unambiguous addition to living space rather than a bonus room with caveats.
- Check whether your existing conservatory, or a proposed new one, meets current building regulations for insulation and glazing
- Prioritise a solid or part-solid roof over a fully glazed roof for year-round comfort
- Insulate the base and walls properly rather than building on a basic slab
- Consider underfloor heating if the space will be used through winter
- Compare the cost of a well-specified conservatory against a solid roof extension before deciding
- Speak to a local estate agent about what buyers in your street actually value before committing
We get asked this a lot, and the honest answer is that a conservatory only adds value if it functions as a proper room. If it is too cold to use for half the year, buyers see straight through it, and it can actually work against you.
If you are weighing up a conservatory against a solid roof extension, Hozea Construction can talk you through the real cost and performance differences and provide a free quote for either option. Call 07969 378509 or visit us at 66 Fitzalan Road, Finchley N3 3PE.
Common questions
- Do conservatories need planning permission?
- Many conservatories fall under permitted development if they meet size and height limits, but larger ones, those in conservation areas, or flats will usually need planning permission. Building regulations apply separately and depend on the specification.
- Is a conservatory cheaper than an extension?
- Generally yes, a traditional glazed conservatory costs less than a solid roof extension of the same size, but a well-insulated orangery style build narrows that gap considerably and performs much better year round.
- Can an old conservatory be upgraded rather than replaced?
- In some cases yes, replacing a glazed roof with an insulated solid or part-solid roof and upgrading the glazing can significantly improve comfort without a full rebuild, though it depends on the existing structure and foundations.