Loft: Hip-to-gable

Good news — yes, you can increase the functional square footage of your home upwards, even if your roof has inward sloping edges. That’s where a hip-to-gable loft conversion comes in. In just four to six weeks you could be enjoying your new office, bedroom or nursery at the summit of your house. Find answers here to your who, what, when, where and how questions.

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How does a hip-to-gable roof conversion work?

We extend the usable area of your attic by changing the sloped wall (hip) to a vertical one (gable). This straightening up of the top of your property provides headroom across the width of the house to walk around.


Then you can decide how to make this area work for you, which could be:


  • Velux: affordable; straightforward; keep the slanted front and back; install windows; extra £25K+
  • Dormer: enlarge room further; flat roof/straight wall at rear; additional £35K upwards
  • Double: maximise both edges; symmetrical result
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Where has the option of a hip-to-gable loft?

This option is available for many types of homes with slanting sides, including:


  • Semi-detacheds
  • Detacheds
  • End-terraces
  • Bungalows
  • Chalets


In fact, it’s only mid-terraces that aren’t viable for this project.

What does a hip-to-gable loft conversion cost?

  • From £45,000


This average cost includes the construction necessary to implement the structural work. That includes such essentials as:


  • Plastering
  • Plumbing
  • Electrical wiring
  • Heat sources


The end cost also needs to take into account the following:


  • Floors
  • Wallpaper/paint
  • Suites
  • Lights


Choosing standard finishes is the best way to keep prices low. Of course, the size is a major factor too. Two bedrooms, Juliet balcony, dressing area, tailored storage solutions, and a shower room in a luxury high-spec will cost more than a less ambitious alteration.

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When is hip-to-gable roof conversion permission required?

There are many reasons to choose this process of enlarging your loft, but you’ll want to know the official situation before you dive in:


  • Typically considered permitted development
  • Planning permission usually not required
  • Conservation areas can impose limitations
  • Listed status can result in restrictions
  • Building regulations approval necessary on completion


Reputable building firms help with all of these finer details.

Who should carry out the project? Here’s why you should choose Fittra

Our experienced team offers:


  • Consultations free of charge throughout
  • Project management start to finish
  • Costings in detail
  • Clear payment schedule
  • Low deposits (just 5%)
  • Supplier discounts benefitting you
  • Tailor-made designs
  • Planning permission applications
  • Legal advice
  • £5M public & products/£10M employer’s liability insurance
  • Happy customer testimonials
  • NHBC-registered, NFB/FMB/Considerate Constructors/TrustMark accreditations
  • 10 years experience


Get in touch today for a no-obligation chat.

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Interested in hip-to-gable?


Why Work With US

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at all stages

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with project manager

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liability insurance

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of works

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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10% only deposit payments
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Detailed cost breakdown

In the End You Will Get




Our Projects

Do you have questions?

Frequently Asked Questions

What is a hip to gable loft conversion?

Hip to gable loft conversion is mostly found on semi-detached properties with an existing hipped roof. The hip is extended up vertically from the ridgeline to create a gable and a Rear Dormer is formed to the rear of the property.

Is hip to gable more expensive?

Doing a double hip to gable loft conversion will be more expensive than a single conversion, however, it will not double the price, as much of the work to carry out the double conversion will already be necessary for the single conversion.

What is the advantage of a hip roof?

Hip roofs are more stable than gable roofs. The inward slope of all four sides is what makes it sturdier and more durable. Hip roofs are excellent for both high wind and snowy areas. The slant of the roof allows snow to easily slide off with no standing water.

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02082 438568

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