Structural surveys
We assess existing roof structure, party walls, and load paths — ensuring the mansard is engineered correctly from the outset.
Mansard loft conversions for maximum space
Bespoke mansard consultations that shape rear roof extensions — from structural survey to refined finishing.
- On-site loft consultations across Hertfordshire
- Rear mansard extensions with full standing height
- Planning, structural work, and finishing managed in-house
Mansard loft conversions
Mansards that transform the upper storey
Every mansard begins with understanding your roof geometry, street scene, and how much additional space you need — not with a one-size-fits-all extension.
We visit your property, assess the existing roof structure, and discuss how a mansard could create the floor area and headroom your family requires. From there, we develop designs for roof pitch, window rhythm, and external materials that guide planning applications, structural engineering, and construction.
Mansard conversions are particularly effective on Victorian and Edwardian terraces, where a rear mansard can deliver a full additional storey of usable space. We refine every detail — from slate or tile selection to dormer windows within the mansard — until the extension feels architecturally coherent and built to last.
What we deliver
Every detail considered
Rear mansard design
Full-height rear extensions with near-vertical rear slopes — maximising floor area while maintaining a refined street-facing elevation.
Architectural detailing
Window proportions, material palettes, and roof coverings chosen to complement your property — whether period or contemporary.
Planning applications
Mansard conversions typically require planning permission. We prepare and manage applications with clear drawings and supporting statements.
Steel & timber engineering
Structural calculations, steel beam specifications, and floor joist designs — specified for safety, compliance, and long-term performance.
High-spec finishing
Insulation, acoustic separation, plastering, and joinery completed to a premium standard — rooms ready to furnish and enjoy.
Mansard loft conversion FAQs
Common questions about mansard conversions
Answers about mansard loft conversions, planning, and what to expect from your consultation.
Begin your mansard loft conversion
We would be delighted to visit your property and explore what a bespoke mansard extension could deliver.
Service areas
- Loft Conversions in Hertfordshire
Bespoke loft conversions for homes across Hertfordshire — dormer, mansard, Velux, and hip-to-gable conversions from consultation through completion.
- Loft Conversions in Hertford
Bespoke loft conversions for Hertford homes — dormer, mansard, Velux, and hip-to-gable conversions from consultation through completion.
- Loft Conversions in Watford
Bespoke loft conversions for Watford homes — dormer, mansard, Velux, and hip-to-gable conversions from consultation through completion.
- Loft Conversions in St Albans
Bespoke loft conversions for St Albans homes — dormer, mansard, Velux, and hip-to-gable conversions from consultation through completion.
All services
- Dormer Loft Conversions
Bespoke dormer extensions that transform cramped roof space into generous, light-filled rooms.
- Hip-to-Gable Loft Conversions
Hip-to-gable roof alterations that unlock generous loft space on hipped-roof properties.
- Loft Bedrooms & En-Suites
Master bedrooms and en-suite bathrooms in the loft — designed for privacy, daylight, and everyday comfort.
- Loft Home Offices
Dedicated loft workspaces with daylight, connectivity, and acoustic separation from the rest of your home.
- Planning & Building Regulations
Planning permission and building regulations for loft conversions — advice, drawings, and submissions handled in-house.
- Structural Loft Work
Structural engineering and construction for loft conversions — steelwork, floor joists, and roof alterations done properly.
- Velux & Roof Light Conversions
Roof light conversions that unlock attic space with minimal structural change and maximum natural light.