Designed to Build · Sheffield & South Yorkshire

Loft Conversions in Sheffield

Create useful living space with a loft conversion designed around your roof, layout and budget. Speak to our Sheffield team about a survey, structural work and a clear project quote.

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A loft project, from structure to exterior

Photographs from our Designed to Build project archive show the rear elevation before work, the completed dormer exterior and stages of construction.

Rear of the stone house before the dormer was added — The rear elevation before the loft conversion began.

Rear dormer with dark slate cladding and two windows above a stone house — Completed rear dormer exterior from a Designed to Build loft conversion project.

Timber dormer wall studs and roof joists above the existing slate roof — The dormer framework before exterior cladding was fitted.

Exposed roof rafters and timber floor framing inside the loft — Roof and floor framing photographed during the loft conversion.

New slate roof with two rooflight windows beside access scaffolding — Rooflights bring daylight into the loft beneath the sloping roof.

New timber staircase beside unfinished masonry and wall framing — Staircase installation before plastering and finishing.

Make the roof space work for your home

A loft conversion can create a bedroom, home office or additional family space without extending into the garden. The right design starts with the existing roof, the staircase position and the room you want to use every day. A loft that looks spacious when empty can feel very different once insulation, floor strengthening and stairs are allowed for.

Designed to Build works on loft conversions in Sheffield and South Yorkshire, from initial survey and design through structural work and the internal finish. We assess the property before recommending a layout or giving a detailed price. The aim is a practical room that connects properly with the rest of your house.

Types of loft conversion we build

Dormer loft conversions

A dormer projects from the roof slope to add useful standing height. It can make a bedroom and bathroom layout easier to achieve, particularly where the original roof slopes sharply towards the eaves.

Explore dormer loft conversions

Hip-to-gable loft conversions

Replacing a sloping side roof with a vertical gable can increase the usable volume. The survey must consider roof geometry, structural support and how the proposed roof relates to neighbouring homes.

Explore hip-to-gable conversions

Mansard loft conversions

A mansard substantially alters the roof to create more internal space. It is a more involved design and construction project, so planning, structure and weather protection need considering early.

Explore mansard conversions

Velux and rooflight conversions

A rooflight conversion uses the existing roof shape. It can suit a home that already has enough usable height, but still needs a compliant floor, staircase, insulation and fire-safety design.

Explore rooflight conversions

Bungalow loft conversions

Converting a bungalow can create an additional level of accommodation. Staircase placement and the effect on the ground-floor layout are just as important as the size of the new rooms.

Explore bungalow conversions

L-shaped loft conversions

Where the roof form and planning constraints allow it, an L-shaped dormer can connect the main roof with a rear outrigger. A measured design is essential before assuming both sections can be converted.

Explore L-shaped conversions

How much does a loft conversion cost in Sheffield?

The cost depends on the roof type, steelwork, staircase, bathroom, access and finish. Our published Sheffield case study records a completed dormer conversion at £55,000, including a bathroom. That is a project example, not a starting price or a quote for every house.

Read the loft conversion cost guide for the itemised breakdown and the questions to ask when comparing quotes. Confirm whether drawings, calculations, building control, VAT and decorating are included in your own quotation. Avoid comparing a shell-only price with a fully finished room.

Our loft conversion process

1. Survey and design

We discuss the space you need, inspect the roof and consider access, head height, the floor structure and the staircase. The design should work as part of the whole home, including the landing and rooms below. Bring any existing drawings and explain whether a bedroom, bathroom or office is the priority.

2. Planning and Building Regulations

Planning permission and Building Regulations are separate checks. Some house loft conversions can fall within permitted development, subject to conditions and restrictions. The design team should check the property’s position rather than assume an approval is unnecessary. Habitable loft conversions also need the relevant building-control process.

3. Steelwork and structure

Structural calculations establish the support required for the new floor and altered roof. The design determines the beam sizes, bearings and connections. Our loft steelwork service supports this stage; beam sizes must never be selected from an online rule of thumb.

4. Fit-out and sign-off

Insulation, windows, first-fix services, plastering and finishing follow the agreed programme. Discuss sanitaryware, sockets, lighting and storage before they are needed on site. At handover, check the agreed scope and obtain the relevant inspection and completion documentation.

See the project detail before deciding

Our £55,000 Sheffield dormer breakdown explains how the budget was divided between structure, dormer construction, windows, stairs, services and finishing. For layout options, see our loft conversion ideas. The project photographs above show the rear dormer, rooflights and construction stages from our supplied project archive. Ask us about the details relevant to your property.

Areas we cover

Our base is in Sheffield and our core service area is South Yorkshire. Tell us your postcode when enquiring so we can confirm survey availability for your property. See areas we cover for local information as those pages become available.

Loft conversion FAQs

Do I need planning permission?

Some house loft conversions qualify as permitted development, but roof alterations, property type, designated land and removed rights can change the answer. Check the specific proposal before work begins.

Can every loft be converted?

No. Roof geometry, structural condition, usable height, access and staircase position can limit what is practical. A measured survey is the starting point.

Can I include a bathroom?

Often, but the layout must accommodate usable height, drainage, water supply and ventilation. Include the bathroom in the initial design and quotation.

How long does the work take?

The programme depends on conversion type, approvals, structural work and fit-out. Ask for a project-specific schedule that separates design and approvals from time on site.

Is loft boarding the same as a conversion?

No. Storage boarding does not create an approved bedroom or office. Compare loft boarding and a habitable loft conversion before choosing the work you need.

Planning reference: Planning Portal loft conversion guidance. Requirements depend on the property and proposal.

Talk to us about your property

Tell us where the property is, what you want to change and whether you have drawings. We can discuss the next practical step and arrange a survey where appropriate.