Space, Value, and Everything You Need to Know
As August arrives and we enjoy the high point of summer, many homeowners find
themselves looking out at the garden and wishing for more space to relax, entertain,
or work. A conservatory remains one of the most popular ways to expand a home
giving you a bright, versatile living area without the huge cost and disruption of a
traditional brick extension.
Whether you are thinking about building a brand-new conservatory or upgrading an
existing space to make it usable year-round, here is everything you need to know
about extra space, property value, windows, doors, and building regulations.
Why Add a Conservatory?
Extra Space, Lifestyle, and Property Value
Adding a conservatory isn’t just about glass and frames, it’s about how you live in
your home.
Versatile Extra Space: Modern conservatories serve as light-filled dining
rooms, dedicated home offices, garden lounges, or vibrant playrooms for
growing families.
Seamless Garden Connection: During late summer, open doors allow warm
breezes inside and create a smooth transition between your indoor living
space and outdoor patio.
Added Property Value: A well-built, high-quality conservatory can typically
add between 5% and 12% to a home’s value in the UK. Premium glass or
solid-roof installations consistently deliver the highest return on investment by
creating a room that feels integrated into the main property.
Conservatory FAQs: Doors, Windows & Building Regulations
When planning a conservatory, practical questions around doors, thermal
performance, and design frequently come up. Here are clear answers to the most
common questions:
Do you have to have a door between the conservatory and the house?
In short: usually, yes.
Most UK conservatories are exempt from Building Regulations only if they maintain
thermal separation. This means there must be an external-grade door between your
main home and the conservatory to prevent heat loss into what is typically a
separate heating zone.
If you wish to remove this internal door to create an open-plan layout, the
conservatory is no longer classed as an exempt structure. To remove the door
legally:
The conservatory must meet modern Part L thermal standards (e.g., highly
insulated roof, upgraded glazing, and thermally broken frames).
The heating system must be controlled independently or approved for open-
plan use.
A Building Control officer must sign off on the conversion.
Without this sign-off, you risk issues with home insurance, property resale, or being
required to reinstall doors before selling your home.
Do conservatories need external doors?
Whether your conservatory has doors leading outside comes down to personal
preference and how you plan to use the space. Most homeowners choose French
doors, sliding patio doors, or bi-folding doors because they offer easy access to the
garden and patio, helping the room feel open during summer months.
Can you replace windows or doors in an existing
conservatory?
Yes, absolutely. You do not need to replace an entire conservatory structure if the
base and framework are in good condition.
Replacing Conservatory Windows: If your glass is old, misted, or letting in
drafts, replacing the sealed units or entire frames with high-performance,
solar-control double glazing will dramatically improve temperature control.
Replacing Conservatory Doors: Upgrading old double doors to sleek bi-
folds or modern sliding doors can transform access and make an older
conservatory feel brand new.
What types of windows can I have in a conservatory?
The opening style of your conservatory windows can almost always match the
existing window styles on your home. Whether you prefer standard casement
windows, top-openers, side-openers, or tilt-and-turn styles, frames can be
customised so the new addition looks like a seamless continuation of your property.
What is the Average Cost of a Conservatory?
Conservatory prices vary significantly depending on total size, frame materials
(uPVC, aluminium, timber), glazing choices, base conditions, and roof design
(polycarbonate vs. performance glass vs. solid tiled roof).
Because every home and base installation is unique, static “average price” figures
rarely reflect the true cost of a specific project. A compact, glass-roofed structure has
vastly different material and labour requirements than a large, solid-roofed orangery
style.
The best way to get an accurate figure is to have an installer assess your site, review
your design goals, and provide a tailored quotation based on exact dimensions.
Planning Your Conservatory Project
If you want a light, airy retreat to enjoy the rest of the summer and a warm, energy-
efficient space when autumn arrives, upgrading or installing a modern conservatory
is a smart investment.
Whether you need advice on replacing old glazing, exploring solid roof upgrades, or
choosing the perfect window and door frames, getting expert guidance ensures your
new space is compliant, comfortable, and built to last.