HOUSE
DESIGN & RENOVATION
IN LONDON

Loft: L-shaped dormer

Maximise your attic with an L-shaped (or “dog leg”) dormer. Perfect for certain types of properties, this loft conversion gives you two sections at right angles, joining at the corner. With all this extra space, you can finally have that guest room, master bedroom, en-suite and walk-in wardrobe you’ve always dreamed of.

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What house styles can have an L-shaped loft conversion?

Terraced and semi-detached properties from the Victorian period are most suitable for this project, when they have:

  • Main roof: larger section placed here, positioned higher up, facing rear
  • Back extension: for smaller part, lower height, facing neighbour 

Wondering what to use each area for? You can usually fit in:

  • Two bedrooms: larger
  • One bathroom: smaller
  • Juliet balcony: rear-facing, for ventilation/light

It makes sense to place the washing facilities at the back, as that’s where you’ll find the soil pipe, so plumbing is much more straightforward. 

There are other options, such as:

  • Study/office
  • Fitness/yoga studio
  • Bedroom with dressing room
  • Playroom/nursery
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L-shaped dormer loft conversion planning permission

Keep to certain guidelines and you won’t need planning permission for your expansion, as it’ll come under Permitted Development. These currently include:

  • No more than 50m³ added (detached/semi), 40m³ (terraces)
  • Not in conservation district
  • Not a listed building
  • No balcony (Juliet allowed)
  • No materials that aren’t in keeping with original structure

The part facing neighbours might require permission. The company carrying out the work should take into consideration all of these factors.

There are also Building Regulations that your construction firm needs to adhere to. Areas that need to be approved/certified include:

  • Headroom (2m height usually required)
  • Roof
  • Heating
  • Plumbing
  • Electricals
  • Stability of structure
  • Insulation
  • Sound proofing
  • Glass/windows/balconies and flashings
  • Stairs
  • Fire safety

L-shaped dormer loft conversion cost

  • From £50,000

It’s one of the most expensive ways to extend your home, but don’t let that put you off. An L-shaped dormer loft conversion price is high because it adds so much floorspace with usable headroom alongside — almost as much as your existing first floor.

The cost is about £15K more than a standard one, but given that you get another part for an additional room, it’s an investment well worth making. It’ll enlarge your liveable areas significantly, and increase the value of your property should you sell in the future.

Timeframes are longer, naturally, with an average of 7-10 weeks. So it’s understandable that the cost is higher in line with extended labour plus extra materials.

Why choose Fittra?

With 10 years experience we offer an end-to-end service, encompassing:

  • Free consultations
  • Planning permission process
  • Legal advice
  • Project management
  • Buying discounts
  • 5% deposit
  • Tailor-made design
  • Liability insurance: £5M public/products, £10M employer’s
  • Considerate Constructors, TrustMark, FMB, NFB accreditations
  • NHBC-registered

Contact us today to discuss your plans.

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Interested in new builds?
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WHY WORK WITH US
pay only for work that has been done!
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FREE CONSULTATION
at all stages
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24/7 COMMUNICATION
with project manager
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£10M EMPLOYER’S
liability insurance
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FREE SCHEDULE
of works
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Benefits from our trade discounts
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£5M public & products liability
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5% only deposit payments
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Detailed cost breakdown
Integrated, in-house team will work on your project
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Benefits from our trade discounts
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£5M public & products liability
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5% only deposit payments
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Detailed cost breakdown

In the end you will get

A high-end product delivered on time and on budget!

TESTIMONIALS
SEE WHAT PEOPLE ARE SAYING
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Ealing

“Fittra completed a rear extension, loft conversion and full refurbishment of our house in Ealing late last year. This included new bathrooms, heating system (including underfloor heating), electrics and plumbing. When obtaining quotes, Fittra’s prices were in the middle of the three companies who came back to us with costs, but the fact that it was fully itemised (unlike the other costs we received) gave us piece of mind that we knew exactly what we were getting for our money. “Read More

Wandsworth

“Can’t speak highly enough of Fittra and the job they did. They completed a rear extension, side return and loft extension and pretty much a full refurbishment of our house and garden in SW London. They not only did an incredible job, but they were also great to work with too. Vadym and Ivan’s team were incredibly efficient and hardworking and really amenable and collaborative. I have recommended them to a few friends subsequently, and will continue to do so.”

Hanwell, New build

Team at Fittra possesses all the attributes necessary to be an excellent contractor: they know their market extremely well; they are diligent, responsive, and yet very understanding with their clients. They are very professional and offer cost saving alternatives when possible. The thing that has impressed me the most is the professionalism, knowledge and helpfulness of all the workers.

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Isleworth

“We did our house fully renovation last year July 2019 – December 2019 with Fittra. We are very pleased with the results – our new kitchen (rear extension with lantern roof light), loft conversion, hardwood flooring, underfloor heating, tiling and etc.. Ivan and his team are truly professional. They finished the job with timely manner and customer satisfaction. Their breakdown quotes are easy to understand and easy to work with. We are highly recommended for Ivan, Igor and the team. Great job!!!”

OUR PROJECTS
Ealing
Ealing

This project focused on renovating the terraced house by adding a rear extension and converting the loft. Two large skylights were installed to brighten up the living area and a new bedroom with en-suite shower created on the top floor. The extension added space to the side and rear of the property; this allowed for […]

Wandsworth
Wandsworth

The client chose us for this Wandsworth property to complete a house renovation, an L-shape dormer loft conversion as well as a wraparound ground floor extension. Open plan kitchen was created to maximise the living space and modern design gave it a gorgeous look. Our team added new sky lights over the kitchen island to […]

Wandsworth House
Wandsworth House

We provided design, engineering, construction and project management on this exciting renovation in the London Borough of Wandsworth. The project consisted of a two-storey extension, a brand new, bespoke open plan kitchen; new windows throughout, a new bathroom, stairway, complete plumbing and electrical, and enhanced lighting throughout and a rear-facing bay window.

Hanwell, New build
Hanwell, New build

We completed this substantial and ambitious new build in march 2019. With a large rear garden and extensive parking, the home makes perfect use of its natural space. A bespoke kitchen, with direct access to the garden, is one of the home’s standout features, as are the luxury bathrooms. The first floor features three spacious […]

Richmond renovation
Richmond renovation

This classic 1960s house in the London Borough of Richmond-upon-Thames required modernisation through a complete renovation.We worked closely with the client to create a new contemporary space that gave the residents more space and improved facilities while seamlessly blended in with the local area.

Isleworth
Isleworth

The client decided on full renovation of this detached bungalow. Our team built a rear extension with lantern roof light and converted the attic into the living space. They also added 2 new bathrooms to the property, installed underfloor heating throughout the house, changed the entire plumbing and rewired all electric systems. During the final […]

Acton
Acton

We recently completed the full refurbishment of this stunning home in Acton, West London. The extensive project included a brand new open plan kitchen with natural light coming from a huge bespokely designed skylight.   The project also included a new loft dormer, a completely new roof, two bathrooms, brand new electrics and a state-of-the-art […]

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