Different Types of Loft Conversions

Dormer Loft Conversion adds a box-shaped extension to the roof, increasing space and headroom, making it ideal for homes with steep roofs. It enhances both the space and the natural light within the loft.

A Hip-to-Gable Loft Conversion converts a sloping roof into a vertical gable wall, providing more space. This type of conversion is best suited for semi-detached or detached homes and maximizes the available area.

A Mansard Loft Conversion changes the roof to a steep pitch, with side-wall windows to offer additional headroom and space. This type is most suitable for homes with low-pitched roofs and provides the most headroom and floor space.

A Velux (Rooflight) Loft Conversion involves installing skylights without altering the roof structure. It works best for homes with adequate headroom and is an affordable and quick option for adding natural light and space.

A Structural Roof Lift raises the entire roof structure to increase headroom and create more space. This is ideal for homes with very low lofts, providing a significant gain in space.

A Double Loft Conversion involves converting both sides of the loft, often with dormer or mansard elements, making it perfect for larger homes. This type of conversion adds substantial living space.

A Party Wall Loft Conversion applies to semi-detached or terraced homes, where the loft conversion affects a shared wall. This type is ideal for adding space in urban areas while working within the constraints of shared walls.

Design To Planning

1. Assess Feasibility

Check headroom: Ensure your loft has enough height for a conversion.
Survey the space: Assess the roof structure and potential space available for the conversion.

2. Define Your Goals

Purpose of the space: Decide if it will be a bedroom, office, bathroom, etc.
Budget: Set a realistic budget for both design and construction.

3. Choose the Type of Loft Conversion

Decide whether you want a Dormer, Velux, Mansard, or other type based on your needs, budget, and roof type.

4. Meet with an Architect or Designer

Initial design: architect to create design concepts that meet your needs and comply with building codes.
Consider layout: Plan how the space will be used (e.g. adding windows, stairs, storage).

5. Planning Permission & Building Regulations

Planning permission: Determine if you need planning permission or if the conversion falls under permitted development.
Building regulations: Ensure the design complies with structural, safety, and insulation standards.

6. Detailed Design & Structural Plans

Architect's final plans: Once approved, the architect will finalize the design and provide detailed drawings and specifications.
Structural engineer: If necessary, a structural engineer will be involved to ensure the roof can support the conversion.

7. Submit Planning Application (if needed)

Submit your design to the local planning authority (if required) and await approval. This process can take a few weeks to months.

8. Start Construction

Once planning is approved, begin the construction process, including structural changes, insulation, windows, and other work.

Guide Line Rules

1. Headroom

Minimum 2.2 meters (7.2 feet) in the centre; low lofts may need a roof lift.

2. Planning Permission

No permission needed for some conversions, but required for significant changes (e.g., dormers, roof alterations) or if in a conservation area or a listed building.

3. Building Regulations

Ensure the roof can support the load, fire safety (e.g., fireproof stairs), proper ventilation, insulation, and soundproofing.

4. Roof Design

Dormers need to follow local aesthetic rules; Velux windows don’t need permission but must avoid overlooking neighbours.

5. Space and Access

A proper staircase is needed; rooms must meet size requirements (e.g. 7 square meters for a bedroom).

6. Party Wall Agreement

Needed if affecting a shared wall (semi-detached/terraced homes).

7. Local Authority Approval

Must comply with building regulations and final inspections may be required.

The above covers all the essential points briefly.

Cost Range

Velux (Rooflight) Loft Conversion:
- Cost: £15,000 - £25,000+
- Description: This is the most basic type, adding skylights without altering the roof structure. It’s generally the cheapest option.

Dormer Loft Conversion:
- Cost: £30,000 - £50,000+
- Description: Involves adding a box-shaped structure to the roof to increase headspace and create a usable space.

Hip-to-Gable Loft Conversion:
- Cost: £40,000 - £60,000+
- Description: Converts a sloping roof to a vertical gable wall to maximise space, ideal for semi-detached or detached homes.

Mansard Loft Conversion:
- Cost: £45,000 - £70,000+
- Description: Involves significant alterations to the roof, typically creating a steep pitch and maximising headspace. It is often the most expensive type.

Structural Roof Lift:
- Cost: £50,000 - £80,000+
- Description: Raises the roof to increase headroom, typically used for homes with very low loft space.