L-shaped dormer loft conversion price 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.

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

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

pay only for work that has been done!

FREE CONSULTATION

at all stages

24/7 COMMUNICATION

with project manager

£10M EMPLOYER’S

liability insurance

FREE SCHEDULE

of works

Benefits from our trade discounts

£5M public & products liability

5% only deposit payments

Detailed cost breakdown

Integrated, in-house team will work on your project

In the end you will get

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

TESTIMONIALS

SEE WHAT PEOPLE ARE SAYING

Maidenhead

The work that Fittra did for me was a full house renovation – this did not include any new build or extension work but it did include moving a number of internal load bearing walls and extending external openings to install large sliding doors. The work was reasonably complex structurally as the upper floor is steel beam and concrete block construction. Externally all windows and doors were changed, guttering and fascias were changed and a new tiled deck constructed to give an outside/inside feel. Internally, walls were moved, new door openings created or widened to give a modern open plan look and feel.Read More

Lewis A

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

Steve K

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.”

Ben and Lucy M

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.

Oksana M

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!!!”

Hlwan M