Loft Conversions in Perth

A loft conversion can add significant living space and value to your home — creating a new master bedroom, home office, or children's retreat without extending your property's footprint.

From dormer and Velux conversions to full structural reconfigurations, we manage every stage to deliver a space that meets building regulations and exceeds expectations.

Marshall & Co has completed loft conversions on properties across Perth, Dundee, Crieff, Kinross, and the wider Perthshire area. We understand the structural requirements of Scottish roof constructions and the building warrant process required for every loft conversion.

Why Marshall & Co?

The first question most homeowners ask is whether their loft has enough space for a conversion. The key measurement is head height: you generally need a minimum of 2.2 metres from the top of the existing ceiling joists to the underside of the ridge beam. If the available height is less than this, a dormer window can be added to increase the usable floor area and headroom.

Roof type is also important. Traditional cut-timber roofs (common in pre-1960s Scottish homes) are usually the easiest to convert because the individual rafters can be supported by new purlins and steel beams, freeing up the loft space. Modern trussed roofs (common in post-1970s homes) can also be converted, but require more structural work to replace the trusses with a steel and timber frame.

Access is another consideration. The new staircase needs to fit within the existing layout without making hallways too narrow or compromising rooms below. We design staircase positions carefully during the planning stage to minimise impact on the floor below.

A Velux or rooflight conversion is the simplest and most affordable option. It involves strengthening the existing floor, adding insulation, installing Velux windows in the existing roof slope, and fitting out the space with electrics, plastering, and a staircase. This works well where there's already adequate head height.

A dormer conversion involves building a box-shaped structure that projects from the rear roof slope, creating additional headroom and floor area. Dormers are the most popular type of loft conversion in Perth because they significantly increase the usable space compared to a rooflight-only conversion. We build flat-roof dormers, gable-fronted dormers, and full-width dormers depending on the property type and planning requirements.

A hip-to-gable conversion is used on properties with hipped (sloped) side roofs. By extending the hip to a vertical gable wall, significant additional space is created. This is often combined with a rear dormer for maximum floor area and is popular on 1930s–1960s semi-detached properties.

Mansard conversions involve altering the entire roof structure to create near-vertical walls with a flat or gently sloping roof above. These create the maximum amount of living space but are the most complex and expensive option. They typically require planning permission.

Loft conversion costs depend on the type of conversion, the size of the space, and the level of fit-out. As a guide: a basic Velux conversion in Perth typically costs between £20,000 and £35,000; a dormer conversion ranges from £30,000 to £55,000; and a hip-to-gable with dormer can cost £40,000 to £65,000. These prices include structural work, staircase, insulation, electrics, plastering, and basic decoration.

Adding an en-suite bathroom typically adds £5,000–£10,000 to the total, depending on the specification. Premium finishes such as underfloor heating, built-in storage, and high-end sanitaryware will also increase the investment but add proportional value to the property.

A well-executed loft conversion typically adds 15–20% to a property's market value, making it one of the best return-on-investment home improvements available. For a property valued at £300,000, that's a potential value increase of £45,000–£60,000 — often significantly more than the cost of the conversion itself.

Every loft conversion in Scotland requires a building warrant. The application includes detailed drawings, structural calculations, insulation specifications, and fire safety provisions. We prepare and submit all documentation and manage the process through to approval and completion certificate.

Fire safety is a critical element of loft conversion design. When you add a habitable room above the first floor, Scottish building regulations require a protected escape route from the new room to the ground floor. This typically involves installing fire doors to all rooms opening onto the stairway, interconnected mains-powered smoke alarms on every level, and at least one escape window in the new loft room.

We also ensure full compliance with thermal insulation requirements. Loft conversions must meet minimum U-values for walls, roof, and floor, which typically means 100mm+ of rigid insulation between and over the rafters, plus insulation between the new floor joists.

Add 15–20% to your property value with additional habitable space

No loss of garden space — all work is within the existing building envelope

Often no planning permission required for Velux and rear dormer conversions

Building warrant applications managed from submission to completion certificate

Structural engineer calculations included in our service

All trades coordinated under one project manager

En-suite bathrooms, built-in storage, and premium finishes available

Fully compliant with Scottish fire safety and insulation standards