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Trusted Loft Conversions
A beautifully finished loft bedroom conversion
A Proper Bedroom — Not Just a Boarded Loft

Loft Bedroom Conversion Specialists

A loft bedroom conversion costs between £18,000 and £35,000 in the UK, including insulation, flooring, a staircase, and building regulations sign-off.

We create properly designed, building-regulations-compliant loft bedrooms — with correct insulation, fire-safe flooring, natural light, and a safe permanent staircase. Not just a boarded space with a ladder.

From £18,000
Timescale: 6–10 weeks

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What is a Loft Bedroom Conversion?

A loft bedroom conversion transforms your unused loft space into a properly habitable bedroom. The critical distinction is between a "boarded loft" — which simply lays flooring boards over the existing joists for storage — and a genuine bedroom conversion that complies with building regulations and delivers a comfortable, safe, and energy-efficient room.

A proper loft bedroom requires structural floor joists sized to take bedroom loading, warm roof insulation to current Part L standards, fire-rated plasterboard, emergency escape windows, a permanent staircase, mains-wired smoke alarms, and adequate ventilation. We design and build every loft bedroom to meet these requirements as a matter of course.

The conversion type — Velux, dormer, or otherwise — determines the external structure. The loft bedroom conversion is the interior: the insulation, flooring, walls, ceiling, lighting, windows, and staircase that together create a room you will genuinely want to sleep in for the next 20 years.

Key Benefits of a Loft Bedroom Conversion

Adds a True Bedroom

A building-regs-compliant conversion counts as an additional bedroom when valuing or selling your home.

Year-Round Comfort

Proper warm roof insulation keeps the room warm in winter and cool in summer — essential for a bedroom.

Fire Safety Built In

Fire-rated construction, mains smoke alarms, and compliant escape windows are standard on every project.

Strong Property Value

Adding a bedroom to your home can increase its value by up to 20% — often exceeding the conversion cost.

Is a Loft Bedroom Conversion Right for My Home?

Most UK homes with a pitched roof can accommodate a loft bedroom conversion. Check these key criteria:

  • Ridge height of at least 2.5 m above existing ceiling joists (checked on free survey)
  • Pitched roof — flat roof properties may require more extensive structural work
  • Space on the floor below for a permanent staircase (we design to minimise floor loss)
  • Planning permission or Permitted Development eligibility confirmed on survey
  • Desire for a habitable room — not just additional storage space
  • Building regulations approval willingness — required for all habitable loft rooms

What's Included in Every Loft Bedroom Conversion

Free site survey and headroom assessment
Architectural drawings and building regs application
Structural engineer floor joist calculations
Warm roof insulation to Part L standard
New structural floor (fire-rated chipboard or engineered board)
Stud walls and fire-rated plasterboard throughout
Dormer or Velux windows for light and emergency egress
First-fix and second-fix electrical installation
Mains-linked smoke and heat alarm system
New permanent staircase and handrail
Fire-rated door to new staircase
Building regulations sign-off certificate

Typical Cost and Timescale

Cost Guide

From £18,000

A Velux-style loft bedroom. Dormer bedrooms start from £25,000. All costs include planning, structural, and building regs work — no hidden extras.

Build Programme

6–10 weeks

Depending on conversion type and specification. Velux bedrooms can be completed in 6 weeks; dormer bedrooms typically take 8–10 weeks.

Frequently Asked Questions

Does a loft bedroom require building regulations approval?
Yes — any loft conversion used as a habitable room requires building regulations approval, regardless of whether planning permission is needed. Building regs ensure the room is structurally safe, properly insulated, fire-safe, and adequately ventilated. We submit the building regulations application on your behalf and a building control officer inspects the work at key stages, issuing a completion certificate at the end.
What ceiling height is needed for a loft bedroom?
Building regulations require at least 2.2 m clear headroom over a usable floor area of approximately 7.5 m². In practice, we aim for the maximum possible headroom by insulating at rafter level (warm roof method) rather than between joists, which preserves every centimetre of height. If your existing ridge height is at least 2.5 m above the ceiling joists, a comfortable bedroom is almost certainly achievable.
What type of staircase is needed for a loft bedroom?
A proper, permanent staircase is required by building regulations — a loft ladder or retractable stair is not acceptable for a habitable room. The staircase must meet minimum width requirements (typically 600 mm clear width), have a maximum pitch of around 42 degrees, and be fitted with a compliant handrail. We design the staircase to minimise the floor space it occupies on the floor below while meeting all regulatory requirements. Space-saving alternating-tread stairs are an option where headroom is limited on the landing below.
How is a loft bedroom insulated?
We insulate loft bedrooms using the warm roof method — insulation is fixed between and below the rafters, keeping the roof structure inside the thermal envelope of the building. This prevents cold bridging, eliminates condensation risk, and uses every centimetre of available ceiling height. We specify insulation to at least the minimum U-value required by Part L of the Building Regulations (currently 0.18 W/m²K for roofs), and often exceed this for improved comfort and energy efficiency.
Will converting my loft into a bedroom add value to my home?
Yes. Adding a bedroom to your home is one of the highest-returning home improvements available. According to Nationwide Building Society research, adding a bedroom through a loft conversion can increase property value by up to 20%. Estate agents consistently report that a properly converted loft bedroom — with building regs sign-off, proper staircase, and compliant insulation — is valued by buyers as additional square footage rather than just a bonus room.

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