14 years of



Covering London and Hertfordshire, United kingdom. Type of loft conversion we design and build:

  • Dormer loft conversions

  • Hip to gable conversions

  • Mansard loft conversions

  • L shape loft conversions

  • Prices from £18k

  • Loft company near me

  • Loft conversion company


Loft Conversion

Design and build of dormer loft conversion in London and Hertfordshire.

Hip to Gable

Loft Conversion

Design and build of hip to gable loft conversion in London and Hertfordshire.

L Shaped Loft Conversion

Design and build of l shaped loft conversion in London and Hertfordshire.


Loft Conversion

Design and build of mansard loft conversion in London and Hertfordshire.

Twickenham, London Tw1 Loft Conversion Project

Architecture design and build of the loft conversion located in South West London. 

Loft conversion company are the perfect way to increase the space used in your home without having to compromise on any existing outdoor area. They increase the value of your home by adding an extra bedroom, study, games room or make a space larger to provide you with en-suite facilities. They are generally quicker to complete compared to other types of home extensions and generally do not require planning permission.

We offer services of building, construction the Loft conversion or Design and Build services where we design the loft conversion and then build.

Loft Conversions Planning Permission

Information about local planning permission guidelines on loft conversions click here >

Loft Conversion


How much will it cost me, what are the costs associated with the loft conversions find out >

Type of Loft Conversions

What type of loft conversions are there? Dormer Lofts, Hip to Gable Lofts find out more >

Loft Conversion


What will loft conversion add to my property value, how much value the loft add find out >

Loft Conversion Service Locations

What areas in London and Hertfordshire do we cover. Find out more click here >

Design and Build Process

Loft conversions design and build process, what are the stages of design build find out >

Our experience has allowed us to simplify the process of design, build and management, which means all the services are in one place delivering results to highest standards and on time. We only have experienced people working with us and each stages are broken down into smaller stages to ensure each stage is managed, regulated and complied with government standards.

We are a certified, accredited and fully insured company delivering construction services across London and Nationally. We are fully complaint with government and industry standards.

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Loft conversion company services locations for London, UK and Hertfordshire, UK that we cover for loft conversions. If the area is not listed on the below locations, give us a call to check whether we cover your location, we cover all areas in London and Hertfordshire.

The loft conversions locations for London, United Kingdom:

The loft conversions locations for Hertfordshire, United Kingdom:

loft conversion company hertfrodshire

loft conversion company borehamwood

loft conversion company potters bar

loft conversion company st albans

loft conversion company watford

loft conversion company rickmansworth

loft conversion company brookmans park

loft conversion company cheshunt

loft conversion company northaw

loft conversion company cuffley

loft conversion company goffs oak

Borehamwood, Hertfordshire Office Location:

Unit 720 Catalyst House, Centennial Park, Centennial Avenue, Borehamwood, WD6 3SY

Finchley, London Office Location:

3rd Floor, Hathway House, Popes Dr, Finchley, London N3 1QF



020 8037 7332

Office Hours:

Monday to Saturday 8AM - 6PM

Sunday - Closed

Registered company England:

North London Loft Conversions Ltd. Trading as "Lccl Construction" Registration: 11713461

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Lccl Construction. Specialist loft conversion company, house extension builders, architectural design and planning. Design and build construction company from start to finish including architecture, planning, building control, party walls, structural calculations, project management, construction and finishing.

Accreditation, partnerships and planning:

Planning Portal
Lodon and Hertforshire Construction Awards

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