Extend your Llanishen with an extension

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Flat roof extension cost in Llanishen

A flat roof extension is a great way to add extra space to your home without splashing out on the costs of a pitched roof extension. Often exempt from planning permission rules, you can build a flat roof extension up to 3 metres in height as long as it's not visible from a road. But how much do they cost in Llanishen?

A flat roof extension ranges from the cheapest of £20,960 (PK CONSTRUCTION based in CF14) to the dearest of £22,000 (Jb maintenance and construction Ltd based in CF3), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes. 

Find out how much your flat roof extension will cost in Llanishen by posting a job with HaMuch. We'll send it to extension builders in Llanishen.

Estimates for flat roof extension near Llanishen

Estimates for common extension builder jobs in Llanishen;

JobEstimate
Underpinning a house£16,988
Build a two storey extension£87,232
Build a timber frame extension£25,488
Install a swimming pool£80,488
Cost to build a single storey extension£44,760
Cost to build a side return extension£35,740
Install an RSJ£1,688
Build an outbuilding£9,488
Build a mansard loft conversion£51,488
Cost of a loft conversion£28,950
Build a kitchen extension£41,488
Build a hip to gable loft conversion£41,488
Build a granny annexe£86,488
Build a garden office£9,488
Convert a garage£15,488
Build a new garage£17,988
Build a flat roof extension£21,488
Build a dormer loft conversion£41,488
Lay a concrete foundation£5,738
Convert a bungalow loft£28,488
Basement conversion cost£31,740
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Rates for other Llanishen trades

Appliance Repair Specialist
Bathroom Fitter
Builder
Carpenter and Joiner
Cleaner
Conservatory Specialist
Door Fitter
Drain Specialist
Driveway Specialist
Electrician
Extension Builder
Fencer
Fire and Security Specialist
Flooring Specialist
Gardener
Handyman
Heating Engineer
Kitchen Fitter
Landscaper
Painter and Decorator
Patio and Path Specialist
Plasterer
Plumber
Removals and Storage
Roofer
Tiler
Window Fitter
Flat roof extension cost in Llanishen
Estimate Flat roof extension cost in Llanishen based on hourly/daily rate (excluding VAT or callout charges)
Business name Flat roof extension cost
MGKB Ltd, Llanishen, CF23 £21,520
R. Hughes Designs, Cardiff, Cardiff, CF23 £21,448
K WALKER CONSTRUCTION, Llanishen, CF23 £21,504
Forty Builders Ltd, Cardiff, Cardiff, Cf23 £21,440
TGH & Sons, 8 greenlawns, cyncoed, cardiff, Cardiff, cf23 £21,456
N OBRIEN BUILDING SERVICES, Trowbridge, CF3 £21,600
Charles Marshall Contracting Ltd, Trowbridge, CF3 £21,528
TGF BUILDING & MAINTENCE, Llanishen, CF23 £21,496
TLC Building Services, Llanishen, CF23 £21,520
HECTOR CONSTRUCTION, Llanishen, CF23 £21,504
Fusion Fitted Furniture, Rhiwbina, CF14 £21,488
Charles James Developments, 13 Wellfield Road, Cardiff, South Glamorgan, CF24 £21,456
TOR BUILD, Adamsdown, CF24 £21,512
Jb maintenance and construction Ltd , Trowbridge, CF3 £22,000
Smarta living Group, Unit K7, Capital Business Park, Parkway, Cardiff, Cardiff, CF3 £21,496
MCp Home Improvements, Adamsdown, CF24 £21,520
PK CONSTRUCTION, Rhiwbina, CF14 £20,960
Griffin building contractors, Cardiff, CF3 £21,200
RIMO CONSTRUCTION, Trowbridge, CF3 £21,528
Heath Windows & Doors Ltd, 105 Portmanmoor Road Industrial Estate, , CF24 £21,600
River Gods Limited, S Glam, CF14 £21,592
Vincor Developments Ltd, Cardiff, CF3 £21,616
ABS Allied Trades, Trowbridge, CF3 £21,528
AK Enterprise (GB) Limited, Cardiff, CF11 £21,200
The Philog Paving Services, Rhiwbina, CF14 £21,488

Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Flat Roof Extension near Cardiff£30£190
Flat Roof Extension near Caerphilly£29£181
Flat Roof Extension near Penarth£31£189
Flat Roof Extension near Risca£27£185
Flat Roof Extension near Church Village£30£188
Flat Roof Extension near Newport£37£200
Flat Roof Extension near Pontypridd£29£184
Flat Roof Extension near Barry£29£189
Flat Roof Extension near Cwmbran£39£190
Flat Roof Extension near Rhondda£27£183