Loft Conversions
Unlock the full potential of your home with a professionally designed loft conversion. At Big Discount Plans, we specialise in producing loft conversion drawings, planning permission applications, and building regulation plans for homeowners, landlords, and developers across Greater London.
Whether you’re planning a dormer loft conversion, hip-to-gable loft, mansard conversion or a Velux/rooflight loft conversion, our experienced designers deliver accurate plans that get approved quickly — helping you add space, value and comfort to your home.
A well-designed loft conversion is one of the best ways to increase living space, property value, and rental income in London.
Why Choose a Loft Conversion?
A loft conversion is often the most effective way to maximise unused attic space without extending your footprint.
Extra space for a bedroom, ensuite, office, studio or playroom
Significant increase in property value
Cost-effective compared to house extensions
Benefits include:
Ideal for HMOs, rental properties and family homes
Many loft types fall under Permitted Development
Minimal disruption when designed correctly
We create loft plans for terraced, semi-detached, detached, and bungalow properties, ensuring full compliance with planning and building regulations.
The drawings were clear and helped us get approval quickly. Highly recommend!
Joan M.
Professional service that made our loft conversion stress-free and straightforward.
Mark T.
★★★★★
★★★★★
Complete Architectural Design Package
Planning Drawings for Loft Conversions
Fully detailed architectural plans showing elevations, sections, roof changes, dormers, stair design, fire escape routes and head height compliance.
Building Regulation Drawings
Compliant drawings covering fire safety, insulation, structural details, floor strengthening, stairs and escape routes — essential for Building Control approval.
Structural Calculations
Engineered structural calculations for RSJ beams, steel frames, dormer structures, ridge beams, joists, and load-bearing walls.
Planning Permission or Permitted Development Advice
We determine whether your loft qualifies under Permitted Development Rights or requires full planning permission.
Party Wall Notices & Guidance
Loft conversions often require party wall agreements — we prepare notices and provide guidance for seamless progression.
Full Application Submission Service
We act as your planning agent, submit all drawings, manage council communication, handle amendments, and resubmit if needed — at no extra cost.
Our design packages include everything required for planning approval and construction:
Optimised for Your Home
Every loft is different, and the success of the conversion depends on how well the design works with the existing roof shape, staircase position and head height. We check these details early so the layout feels natural, the stairs fit comfortably, and the space complies with all building regulations. The result is a conversion that looks right, feels right and can be built smoothly without unnecessary complications.
Ready for a free quote?
info@bigdiscountplans.co.uk
Tell us a few details about your project and we’ll send you a fast, competitive quote.