Bespoke Conservatories in
Caerphilly and Cardiff
A conservatory is only worth building if you can sit in it in January as happily as in July, and that comes down to the roof.
We fit LEKA warm roof conservatories that keep heat in during winter and out during summer, so the room works as everyday living space rather than a store for the ironing board. We are Daimant, a family-run installer based in Caerphilly with over 20 years fitting windows, doors and conservatories across Cardiff and the wider Caerphilly area.
Whether you want a brand new build, a replacement solid roof on a tired glass or polycarbonate conservatory, or a light-flooded orangery, this page walks through the styles, the roof options, planning rules in Cardiff and Caerphilly, realistic cost bands and the guarantees that protect your money. If you would rather talk it through in person, we survey and design for free.
- A LEKA warm roof turns a seasonal glass box into a room you use every day of the year.
- Most new conservatories fall under permitted development in Cardiff and Caerphilly, but conservation areas and Article 4 zones change the rules.
- We replace failing roofs on existing conservatories without rebuilding the base or frames.
- Guide costs run from around £8,000 for a compact warm-roof build to £25,000 plus for a large orangery, fitted.
- We are FENSA registered with IWA insurance-backed guarantees and deposit protection.
- Victorian, Edwardian, lean-to, gable and orangery styles each suit a different house and budget.
See it designed around your home
Book a free design visit and we will measure up, talk through styles and roofs, and leave you with a fixed written quote.
Will a conservatory actually be usable in winter?
Yes, if it has the right roof. The old complaint about conservatories is fair when the roof is glass or polycarbonate: those rooms overheat in summer and lose warmth fast on a cold night, so people stop using them from October to March. The roof is where most of that heat escapes, which is why we lead with the warm roof rather than the frames.
A LEKA warm roof is a lightweight insulated solid roof. It uses a structural frame carrying rigid insulation and a plastered internal ceiling, so the room holds temperature much like the rest of the house. Roof U-values land around 0.15 W/m²K, far ahead of a glass roof at roughly 1.0 to 1.2 and polycarbonate that barely insulates at all. In practice that means a room you heat once and it stays warm, not one that swings from freezing to stifling.
You still get plenty of daylight from the windows and any roof glazing you choose to keep, and you can add a couple of roof lanterns or roof windows to balance brightness against insulation. If your current conservatory is the reason you dread the electricity bill, the replace your conservatory roof option usually solves it in a few days.
Can you put a solid warm roof on my existing conservatory?
In most cases, yes. If your base and frames are sound, we can strip the failing glass or polycarbonate roof and fit a LEKA warm roof onto the existing structure, which is a far smaller job than a full rebuild. We check the frames, the wall plate and the foundations first, because a warm roof is heavier than polycarbonate and the structure has to carry it safely.
Roof replacement is the quickest way to fix a conservatory that leaks, roars in the rain, or bakes in July. It typically takes two to five days depending on size and access, and because we are not touching the base or the dwarf walls there is little mess and no need to redecorate the whole room. Homeowners in Rhiwbina and Llanishen come to us most often for exactly this, a room they already like made comfortable at last.
If the base has moved, the frames are rotten or the original build was undersized, a new conservatory can work out better value than patching an old one. We are honest about this at survey stage rather than selling a roof onto a structure that will not last, and we put the recommendation in writing so you can weigh it up.
Do I need planning permission in Cardiff or Caerphilly?
Usually not. Most conservatories are permitted development, which means no full planning application, as long as they stay within set limits. Broadly, the build must sit to the rear, cover no more than half the land around the original house, not go higher than the eaves of the existing roof, and keep within depth limits from the rear wall, single storey rear extensions being roughly 3 to 4 metres depending on whether the house is terraced, semi or detached.
The exceptions matter. Conservation areas, listed buildings and Article 4 directions remove some permitted development rights, and parts of Cardiff such as Pontcanna and Cathays, along with pockets of Penarth in the Vale, fall into these zones. Caerphilly has its own conservation areas too. We check your address against the local rules before we design anything, and where consent is needed we tell you plainly so there are no surprises.
Many conservatories are exempt from building regulations when they are under 30 square metres, at ground level, separated from the house by external quality doors and have their own heating controls. Once you add a solid warm roof, knock through into the house or exceed the size, building control can apply. We handle the paperwork route with you so the finished room is signed off correctly.
Conservatory, orangery or extension:
which is right?
Think of it as a spectrum from glass to brick. A conservatory is mostly glazed with a lightweight roof and the quickest, most affordable way to add a bright room. An orangery sits in the middle, with more brick or rendered piers, a flat perimeter roof and a central lantern, so it feels more like part of the house while still flooding with light. A full extension is brick and blockwork with a tiled roof and reads as an original room.
For many homes the sweet spot is a warm-roof conservatory or an orangeries build, because you get year-round comfort and a solid ceiling without the cost and disruption of a traditional extension. If you plan to knock two rooms into one and add wide glazed doors, pairing the build with bifold doors opens the whole space onto the garden in summer.
Which conservatory style
suits my house?
Style should follow the house rather than a catalogue. Period and bay-fronted homes in Cardiff suburbs like Cyncoed and Whitchurch tend to suit a Victorian conservatory, with its faceted front and pitched roof, or an Edwardian, whose square or rectangular floor plan gives more usable furniture space. Smaller terraces and bungalows across Caerphilly and Ystrad Mynach often work best with a lean-to, a clean, low-pitch design that tucks neatly under upstairs windows.
Larger properties can carry a gable-fronted conservatory, where the front stays tall to make a real feature, or a P-shaped or T-shaped design that combines styles for bigger footprints. We size and shape everything at survey, and you can see finished projects in our gallery to picture the look on your own home.
Which conservatory style
suits my house?
Style should follow the house rather than a catalogue. Period and bay-fronted homes in Cardiff suburbs like Cyncoed and Whitchurch tend to suit a Victorian conservatory, with its faceted front and pitched roof, or an Edwardian, whose square or rectangular floor plan gives more usable furniture space. Smaller terraces and bungalows across Caerphilly and Ystrad Mynach often work best with a lean-to, a clean, low-pitch design that tucks neatly under upstairs windows.
Larger properties can carry a gable-fronted conservatory, where the front stays tall to make a real feature, or a P-shaped or T-shaped design that combines styles for bigger footprints. We size and shape everything at survey, and you can see finished projects in our gallery to picture the look on your own home.
Victorian
Faceted bay front, ideal for period and bay-fronted homes
Edwardian
Square or rectangular plan, best for usable floor space
Lean-to
Low pitch, neat for bungalows and space under first-floor windows
Gable & P or T shapes
Statement fronts and larger footprints
We size and shape everything at survey. See finished projects in our gallery or book a free design visit and we will advise on the style that works best for your home.
Book a Free Design VisitHow much does a conservatory cost
in Caerphilly and Cardiff?
As a guide, a compact warm-roof conservatory starts from around £8,000 to £12,000 fitted, a mid-size Victorian or Edwardian build with a LEKA roof typically runs £12,000 to £20,000, and a large orangery with brick piers and a lantern sits from around £20,000 to £25,000 and up. A roof replacement onto an existing conservatory is usually the cheapest route to comfort, often from around £5,000 to £9,000 depending on size.
The figures move with floor area, the base and groundwork needed, glazing specification and how much glazed door you add. We give a fixed written price after the survey rather than a vague range, and we can spread the cost with finance if that suits. No quote from us depends on a discount that vanishes if you do not sign on the day.
No quote from us depends on a discount that vanishes if you do not sign on the day.
Finance available. We can spread the cost with finance if that suits. Deposits are protected through the IWA scheme either way.
What glazing and comfort
details matter?
Even with a warm roof, the glazing does real work. We fit A-rated double glazing as standard with a warm-edge spacer bar, argon fill and a low-emissivity coating, giving frame and glass U-values around 1.2 to 1.4 W/m²K. Self-cleaning and solar-control glass are worth considering on south-facing rooms to cut glare and keep the summer heat down further.
The frames tie the conservatory into the rest of the house, so matching the windows matters. Many customers pair a build with our casement windows in the same colour and woodgrain finish for a consistent look. Add underfloor heating or a radiator sized to the room and you have space that holds temperature through a Valleys winter.
How long does it take and are my
money and work protected?
A typical warm-roof conservatory takes around two to four weeks on site once groundwork starts, a roof replacement two to five days, and an orangery a little longer because of the brickwork. We give a realistic timeline at quote stage and keep the same small team on your job from start to finish, so you are not handed between subcontractors.
Around two to four weeks on site once groundwork starts. We give a realistic timeline at quote stage.
Typically two to five days depending on size and access. Little mess, we are not touching the base or dwarf walls.
A little longer than a conservatory because of the brickwork. The same small team stays on your job throughout.
Glazed elements certified against building regulations and self-certified without you needing separate council sign-off.
Your deposit is protected through the Insurance Backed Guarantee scheme via the IWA.
Workmanship guarantee that stands even if circumstances change, protecting the finished work long term.
Worked Examples
Two real jobs from our Caerphilly team, one roof replacement, one orangery build.
A cold glass conservatory in Rhiwbina
A couple in Rhiwbina had a ten-year-old Victorian conservatory with a glass roof they only used in spring and autumn. In summer it hit the high twenties by mid-morning, and in winter the heating never held. The base and uPVC frames were sound, so a full rebuild was not needed.
We stripped the glass roof and fitted a LEKA warm roof with a plastered, spotlit ceiling and two small roof windows to keep the light. The work took three days. With a warm-roof U-value near 0.15 W/m²K, the room now holds heat like the lounge next door, and they use it as a year-round dining space.
A new orangery on a semi in Penarth
A family in Penarth wanted more of a room than a glass box, opening onto the garden for summer. Because parts of Penarth fall within conservation control, we checked the address against the local rules first and confirmed the rear build stayed within permitted development limits, so no full application was needed.
We built a 4 by 4 metre orangery with rendered brick piers, a flat perimeter roof and a central lantern, tied into three-pane bifold doors for the garden opening and matching A-rated glazing throughout. On site it took just over three weeks. It now reads as an original part of the house.
More on conservatories
Each page below covers one part of a conservatory job in detail, from a new warm roof to repairs, with costs and planning rules for Caerphilly and Cardiff.
Conservatories
Conservatory guides
Frequently asked questions
Common questions about our conservatories, warm roofs, planning, costs and guarantees.
Ready to plan a room you will use all year?
Tell us about your home and we will design a warm-roof conservatory or orangery around it, then leave you with a fixed written quote and no pressure to decide on the spot.
