Loft Conversions - the process


Loft conversions in Mill Hill, Barnet, London, NW7.


opening the roof



building loft dormer and stud walls


dormer roof construction


roof construction


insulating new loft space


loft plastering


decorated loft bedroom



Loft conversion - the process...

At the initial visit We will establish whether your loft is suitable to convert, and if the work can be carried out under permitted development or whether Local Authorities Planning Consent is required.  whatever the determination, the work will be carried out under current Building Regulations and inspected throughout the process to ensure the work complies with the current Regulations set by building control. 

Some properties may not require planning permission, provided the loft conversion is the first extension and does not exceed 40 cubic meter’s on a terraced property and 50 cubic meter’s on others. This condition only applies when properties are not located in a Conservation Area and are not at the junction of two public highways. 

All flats require planning permission. 

We will provide you with a fixed detailed quotation and specifications for your proposed project. 

Once quotation is accepted and price agreed, we will put together a schedule of works and contract to be signed by both of us.


We will arrange for a full survey of your property by our architectural services, to produce full working drawings and structural calculations for your proposed conversion. These will comply with all current building regulations. The cost of the plans and calculations are included in the quotation provided.

We will then produce preliminary set of plans based on agreed design, provide you with copies of plans to agree and any alterations made before submission, for Planning or Building Regulations approval.

Once the necessary applications to the local authorities are complete, the work is ready to start. This is subject to schedule for work provided by Kent and Sussex loft conversions (agreed by client)


The Conversion
Your loft conversion should be completed within 6 to 8 weeks depending on your property, and type of loft conversion proposed.


Scaffolding is erected
Your existing loft hatch is sealed shut - this will be plastered over later
We create an opening in your roof for access to loft area
Existing chimney and tanks are removed where necessary
Skip delivery


Structural Work:
All load bearing steels, trimmers, and steel plates that are relevant to your job are installed
Structural walls of the dormers, hip to gables, and mansard are formed
New structural floor joists laid.


Plumbing Work 1st Fix:
Old tanks are removed if required
Tanks that are in use are disconnected and re-located in the void area within your loft space
New pipe work is laid ready to accommodate fixtures to the loft room


Electrical Work 1st Fix:
New wires are laid ready to accommodate all electrical fittings to your loft room(s)


External Work:
New UPVC / Wooden Double glazed windows are installed
Velux skylight windows and flashing kits are installed
Roofing work including tiling, lead work and flat roof/s is completed
Fascia boards, guttering and down pipes are fixed
New external walls are rendered or pebble dashed


Internal Work:
The whole of the loft is insulated to comply with Building Regulations
Internal walls are formed
Flooring is laid creating loft room floor
Stairs to loft area are installed
Whole area of loft conversion is clad with plasterboards
Two coats of plaster are applied to boarded areas


Plumbing Work 2nd Fix:
Radiators, sanitary ware, and new boilers are installed
Waste connection is connected into your existing drainage system
Existing S.V.P is extended


Electrical Work 2nd Fix:
Plug sockets, light points, extractors fans etc. are connected to the wiring in your loft
Connection is made to your existing fuse board
Second Fix:
Skirting and architrave is fixed throughout your newly converted room/s
½-hour fire doors fitted with self-closing devices. 
Self-closing devices are fitted to all existing doors that lead onto the stairwell


The site is cleared and made good
Scaffolding and all skips removed from site
Final inspection by Building Control and a completion certificate issued.














Loft Architectural Design Service

Loft Construction Service

Loft Bathroom Installation Service


Why Convert your Loft ?
Why Invest in Loft Conversion ?
Loft Conversion - Ideas
Loft Conversion - Process
Loft Conversion - Luxury Lofts
Loft Conversion - Bathrooms
Loft Conversion - Velux Windows
Loft Conversion - Insulation
Loft Conversion - Planning
Loft Conversion - Areas We Cover
Loft Conversion - Glossary
Loft Conversion - Usefull Links


Why to choose us for your loft conversion project


Capital - Loft Conversions is a family run business. We successfully completed many projects in north London area which give us practical knowledge of building industry

Guaranteed quality

With Capital Extensions, you get what you want. No quibbles or arguments. We work to contract, using instruments such as JCT Minor Works, so that all parameters are clearly agreed.

Proven results

As you will see from our portfolio, we have successfully delivered projects across Golders Green, Hampstead, Finchley. You will also see a few testimonials from clients; we would be delighted to show you more. It’s a measure of customer satisfaction that most of our new business comes from client referrals.



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