Choose your project type. Each has its own pricing and options.
Most popular
Single Storey Extension
Rear extension, side return, or garden room. Transforms your ground floor.
From £55,000
Best value / sqm
Two Storey Extension
Double the space in one build – ground floor and first floor together.
From £95,000
No garden lost
Loft Conversion
Dormer, hip-to-gable, Velux, or mansard. Your loft, finally used properly.
From £55,000
Which type of conversion?
Most affordable
Rooflight (Velux)
No structural roof change. Usually Permitted Development. Best where head height is already good.
Most popular
Dormer
Vertical-walled box extension to the roof. Full head height throughout. Works on most properties.
Detached houses
Hip-to-Gable
Converts a sloping end roof into a vertical gable wall – maximises usable floor area.
Maximum space
Mansard
Near-vertical roof face, flat roof on top. Maximum space, maximum architectural impact.
Step 2 of 6
How big do you want to go?
Choose your approximate floor area. Not sure? Most family rear extensions start at 25sqm.
25
sqm
Most popular size – open-plan kitchen, dining, and a comfortable living area.
20253035404550
20sqm
Kitchen or garden room
25sqm
Kitchen-diner, most popular
30sqm
Kitchen, dining & lounge
40sqm+
Generous entertaining space
This is the floor area per floor. A 25sqm two storey extension gives you 50sqm of total new floor space – ground floor kitchen-diner plus a first floor bedroom or bathroom.
How many bedrooms does your house have?
Your house size tells us roughly how much loft space you have – and what’s realistically achievable. We’ll use this to give you an accurate indicative price.
2
Bedrooms
~20–25 sqm loft
3
Bedrooms
~25–35 sqm loft
4
Bedrooms
~35–50 sqm loft
5+
Bedrooms
~50+ sqm loft
Step 3 of 6
Choose your specification.
Both levels are genuinely good. The difference is in the materials and finishes – the things you’ll notice every single day.
Essential
Beautifully Made
Clean, considered, and well-finished. Quality you won’t have to apologise for.
Engineered wood or LVT flooring
uPVC windows in white or anthracite
Painted solid-core doors
Brushed chrome ironmongery
White flat-plate sockets & switches
Base price
Signature
Exceptionally Finished
The kind of finish that makes you slightly smug every time you walk in.
Wide plank solid oak or premium LVT
Slimline aluminium windows, full colour range
Solid oak or shaker-style doors
Brass, matt black, or nickel ironmongery
Flat-plate metal sockets to match
+ approx. 22% on base
Step 4 of 6
Choose your colour palette.
Each palette works across windows, external finish, ironmongery, and flooring as a complete, considered scheme. Don’t love any of these? Tell us in the notes on the next page.
Parchment
Warm oak · Cream render · Brushed brass
Chalk & Oak
White render · Pale oak · Matt chrome
Dune
Sand render · Warm timber · Bronze
Slate
Anthracite windows · Grey render · Chrome
Obsidian
Black windows · Dark render · Matt black
+
Build my own
Tell us in your notes
Step 5 of 6
Add what matters to you.
Your space arrives as a beautifully finished shell. Everything below is optional – add what you want and watch the price update.
Glazing & Light
Opening Skylight – standard (70 x 120cm, electric, rain sensor)
Ventilation and natural light – especially useful in kitchen extensions and loft rooms
+ £2,200
Pitched Rooflight (70 x 120cm)
Sits within a pitched or sloped roof section – cleaner look than a standard flat rooflight, works beautifully on shallow-pitch single storey extensions
+ £2,600
Roof Lantern – medium (1.5 x 2m, fixed)
Floods the space with natural light from above – transformative in deeper extensions where rear glazing alone isn’t enough
+ £3,500
Juliet Balcony
Full-height glazed doors onto a railing – brings the outside in beautifully
+ £1,800
Raked / Vaulted Ceiling
The ceiling follows the roofline rather than being flat – creates a dramatic, light-filled space. Most effective on single storey rear extensions. Subject to structural feasibility.
+ £4,500
Comfort & Climate
Underfloor Heating – wet system
Connected to your boiler or heat pump. Even heat, no radiators.
+ £4,500
Underfloor Heating – electric mat
Lower cost, ideal for smaller areas or where wet UFH isn’t practical
+ £1,800
Smart Heating Controls
Zone-controlled, app-compatible – Nest, Hive, or similar
+ £800
Room Fit-outs
Kitchen Fit-out – Essential
Shaker or slab cabinetry, stone or laminate worktops, mid-range integrated appliances
+ £18,000
Kitchen Fit-out – Signature
Oak shaker or handleless cabinetry, quartz or marble worktops, premium appliances
+ £32,000
Bathroom / En-suite – Essential
Shower or bath, WC, vanity, tiling, towel rail, ventilation
+ £8,500
Bathroom / En-suite – Signature
Frameless shower, wall-hung WC and vanity, premium tapware, full-height tiling
Built-in desk and shelving, data points, dedicated lighting circuit
+ £3,500
Dressing Room Fit-out
Bespoke wardrobe and drawer units, mirror, and dedicated lighting
+ £6,500
Future-proofing
Acoustic Insulation Upgrade
Enhanced sound insulation between new and existing structure – particularly valuable in loft conversions above living spaces
+ £1,000
EV Charging Point
A dedicated EV charger wired in during the build – far cheaper now than retrofitting later
+ £900
Cat 6 Data Cabling
Hard-wired ethernet throughout the new space – wired during the build, expensive to add later
+ £700
External
External Paving (30sqm porcelain)
Seamless indoor-outdoor flow. Large-format porcelain, installed during build.
+ £4,200
External Lighting
Recessed ground lights, wall uplighters, or soffit downlights
+ £1,200
Step 6 of 6
Almost there. Tell us about you.
We’ll use this to send you your price summary and match you with three vetted local builders. No cold calls, no pressure.
Your Kura Spaces Brief.
Indicative Project Cost
£0
What Happens Next
1
We review your brief within 2 working days and confirm it’s ready to match.
2
We introduce you to three vetted local builders – each selected for your project type, location, and timeline.
3
All three builders quote from your Kura brief. Genuinely comparable quotes – you choose who feels right.
This price is indicative and based on South West England build rates in 2026. It is not a quote. Final builder quotes may vary based on site conditions, access, and specification choices. Prices exclude VAT at 20%.
Your brief is ready
Hit the button below to send your brief to Kura Spaces. We’ll review it and introduce you to three vetted local builders within 2 working days – completely free.
Free for homeowners · No obligation · Three vetted builders
Brief Submitted.
Thank you – your Kura Spaces brief is with us. We’ll review it and introduce you to three vetted local builders within 2 working days.
Check your inbox for a copy of your brief summary.
