OUR PRICES

The Cost of a Dormer Loft Conversion

You have an ‘average width’ 4.8m (16 feet) London Victorian terrace house for example – a loft conversion here to include a full width rear dormer is likely to be in the region of 35k + VAT – to include:

‘Drawings’… measured survey, architect consultation and detailed construction drawings
Building Regulations
Scaffolding – with appropriate temporary weathering as required
‘Building works’…
1st fix work – roof works to include; rear dormer, steel work, new floor, walls, velux window(s), casement windows in dormer, stairs etc.
2nd fix work – insulation, plasterboard, skim coat finish, fire doors, skirting, electrics, radiator(s) etc.
‘Bathroom’… services, drainage, plumb in client supplied bathroom suite and tiling

Effectively everything… just a lick of paint and flooring (i.e. carpet) will be required to finish!

Variations to the above:

L shaped dormers are normally IRO 42k + VAT
Single mansards are normally IRO 40k + VAT
L shaped mansards are normally IRO 45k + VAT
Dormers – with ‘hip to gable’ roof extensions are normally IRO 40k + VAT

The Cost of a Velux / Rooflight Conversion

The range of prices you might expect to pay for a velux loft conversion may be in the region of 25-30k + VAT – this includes:

Construction drawings
Scaffolding
Steel beams
New supporting and bracing rafters
Flooring
Stairs
Velux window
Fire doors
Insulation, plasterboard and skim coat finish
Skirting and architrave
Electrics and smoke detectors
Radiator

Basically everything but finished flooring (carpet, laminate etc) and decoration.

Some ‘extra over’ options:

Exterior roofing works
Bathroom / cloakroom suites
Painting and decorating
Moving water tanks and/or upgrading to combi or megaflow cylinder
Finished flooring – carpet, timber, laminate, vinyl etc
Built in cupboard and wardrobes

The following are the costs involved for professional services and planning.

Design plans: £400 – £1,400
Architectural drawings: £800
Building inspection: £500 (add £500 for a structural engineer too)
Party wall consultation & draft: £60 – £100
Project management: £1,500 – £2,500
Engineer structural design: £500 – £1,800
Permitted development: £172
Scaffolding hire, erection and removal: £1,000 – £3,000

Fixtures, Fittings, Furnishings & Finishings

When it comes to the actual finishing of your project, the sky’s the limit – or at least as far as your budget will stretch. However, the following are the general loft conversion costs involved with completing your project if you’re planning on overseeing all the work yourself. Of course, when working with a loft conversion company these costs will be outlined in the extended quotation.

Windows & Doors (these costs will vary depending upon how many you require as well as the quality and function you desire). – £800 – £2,500+
Electrical wiring, fixtures and lighting. Though the price can rocket depending upon the type of lighting you want to use. – £1,500 – £3,000
New bathroom (including bath or shower unit, toilet and sinks as well as additional storage space and furnishings). – £3,000 – £6,000+
Additional plumbing for your loft conversion: £1,200 – £2,500
Tiles & guttering: £3,500
New stairwell & access: £750 – £2,000
Interior designer: £75 – £150 per hour
Professional plastering services: £450 – £1,000
Furniture (bedding, sofas, tables, cushions, etc.): £1,500 – £3,000+
Flooring materials: £25+ per square metre

Additional Loft Conversion Costs

Though this list could practically go on forever, there are some additional loft conversion costs to consider as well.

You may want to rent the loft out as a separate domicile, which will mean hiring a wireman to hook up the electricity to an external source: £1,000 – £1,800
External metal stairwell: £3,000 – £4,500+

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