LOFT CONVERSION PLANS AND STRUCTURAL DESIGN
Loft Conversion Plans in London at Clear Fixed Fees
WEDRAWPLANS produces professional loft conversion drawings for planning and Building Regulations. We design rooflight lofts, rear dormers, mansards and hip to gable loft conversions with a clear scope, strong compliance logic, and coordinated structural engineering so the drawings and calculations match.
- Fixed fee quote with clear scope
- Planning and Building Regulations drawing packs
- Structural engineer included through coordinated design and calculations
- All London boroughs and M25 covered
- Fast response, phone and WhatsApp support
Roof works and loft conversion questions
Use WhatsApp for fast replies and attach roof photos if you want. We will tell you the best loft type and the likely planning route.
What makes a loft conversion succeed
Success is not only about adding space. Councils and Building Control assess headroom, stairs, fire safety, structure, insulation, dormer appearance, and neighbour impact. Our packs are designed to communicate compliance clearly so approval and build stages move smoothly.
Free fixed loft quote
Share a few details and receive a clear fixed fee for loft conversion drawings and structural engineering coordination.
Loft conversion types we design
Loft conversions are not one-size-fits-all. The right option depends on headroom, roof shape, party walls, planning context, and your desired room layout. We design lofts that create real, usable space with clear compliance logic.
Rooflight loft conversion (Velux)
The simplest loft type where the roof shape is mostly kept. Great when the existing roof has enough headroom. Still needs correct structural design, insulation build-ups, stair positioning and fire safety planning.
Rear dormer loft conversion
A rear dormer adds headroom and usable floor area. Common in terraces and semis. The dormer size, set-backs, materials, window positions and neighbour impact must be presented clearly for planning where required.
Mansard loft conversion
Mansards maximise space by altering the roof profile, often used in London terraces. These usually require planning and must be designed carefully to match street character, roof rhythm and local guidance.
Hip to gable loft conversion
Often used on semi-detached homes where the hipped roof limits space. The gable conversion increases volume and usually pairs well with a rear dormer for a larger master suite layout.
Loft conversion layout planning
The best loft layouts consider stair position, headroom above stairs, bathroom placement, rooflight positioning, dormer window alignment, privacy, and storage within eaves. We design layouts that feel natural and valuable, not cramped or awkward.
Structural engineer included through coordinated design and calculations
Loft conversions usually require structural changes including new steel beams, new floor joists, trimmed openings, load paths to bearing walls, and sometimes alterations to the roof structure. Building Control typically requires structural calculations for these works. We include structural engineering coordination so your drawings and calculations are aligned.
Steel beams and floor strengthening
We coordinate beam positions, bearings, padstones and joist design so the loft floor is safe and buildable. Structural notes and calculations align with the drawing pack.
Dormer and roof structure support
Dormers and mansards change roof loads. We coordinate structural design to support new openings, rafters, cheeks, and dormer frames safely.
Stair openings and trimmed joists
Stair openings must be trimmed correctly to maintain structural integrity. We ensure the opening, stair geometry and structural design work together.
Buildable drawings for contractors
The goal is not only approval. The goal is a set of coordinated drawings and structural information that contractors can build from with fewer surprises.
Planning permission vs permitted development for loft conversions
Permitted development loft conversions
Many rear dormers and rooflight conversions can be permitted development, but not always. Conservation areas, flats, prior roof alterations, and volume limits can remove PD rights. We confirm the correct route before you spend money building the wrong design.
Planning applications for loft conversions
Mansard lofts, front dormers, large rear dormers and changes affecting street character often require planning permission. We design with officer expectations in mind so decisions are easier and faster.
London loft planning factors that matter
- Roof form, dormer height, and set-backs from eaves and ridge
- Materials and appearance, especially in conservation areas
- Neighbour privacy and overlooking from dormer windows
- Street character and roof rhythm on terraces
- Rear visibility and design quality for officer assessment
Building Regulations, fire safety, stairs and insulation
Loft conversions are heavily assessed under Building Regulations. The most common issues relate to stairs, headroom, fire safety, insulation, ventilation and structural integrity. Our Building Regulations packs are designed to make approval smoother and reduce build-stage surprises.
Stair design and headroom
Stairs must be safe and practical. We design stair layouts that work with the existing house, respect headroom rules and achieve a clean landing arrangement.
Fire safety upgrade strategy
Lofts typically require fire protection measures such as protected stair routes, upgraded doors, smoke alarms, and sometimes escape windows depending on layout. Our drawings coordinate these requirements clearly.
Thermal performance and insulation build ups
Roof insulation and build ups affect headroom and usable space. We plan insulation strategies so you achieve compliance without losing the loft value.
Bathrooms, ventilation and drainage
Adding bathrooms in lofts requires ventilation and drainage planning. Our packs consider practical routing and coordination so contractors can build efficiently.
What is included in your loft conversion drawing package
Existing and proposed drawings
Existing floor plans and elevations, plus proposed loft plans and elevations that clearly show the design.
Sections, roof design and key details
Sections help Building Control and contractors understand headroom, insulation build-ups, dormer form, and structural intent.
Planning submission pack where required
Location and block plans plus planning-ready drawings that present the proposal clearly for officer review.
Building Regulations pack (recommended)
Detailed drawings for Building Control, including compliance notes for stairs, fire strategy, insulation build-ups, and coordination with structural design.
Structural engineer coordination and calculations
Structural design coordination so beam layouts, bearings, and calculations align with the drawings and are suitable for Building Control submission.
Revision support prior to submission
Most projects need refinement. We provide revision support to reach a strong final pack before submission.
Fastest way to get a loft quote
Send postcode plus roof photos on WhatsApp. We will reply with the best loft type, the likely planning route, and a clear fixed quote.
Our loft conversion process
STEP 1
Enquiry, advice and fixed quote
We confirm your property type, roof form and goals. We advise the best loft conversion route and issue a clear fixed quote.
STEP 2
Survey and base drawings
We carry out a measured survey where needed and prepare existing drawings that form the foundation of the loft design.
STEP 3
Design, coordination, and submission pack
We develop the proposed loft design, coordinate structural requirements, and prepare the final planning and or Building Regulations pack.
Smooth build stage coordination
A loft conversion is not only a design job. It is a sequence of roof works, structural installs, insulation build-ups, stair placement, and internal fit-out. Our packs are designed so the contractor has clear information, and Building Control questions are reduced.
Loft conversion plans FAQ
Do you provide structural calculations
Yes. We include structural engineer coordination so your loft design, beam layouts, bearings and structural calculations align with the drawing pack for Building Control.
Can you design a dormer loft conversion
Yes. We design rear dormers, L-shaped dormers, and dormer variations with planning clarity and buildability in mind.
Can you handle mansard loft conversions
Yes. Mansards are common in London terraces and often require planning. We design them to match roof rhythm and local character guidance.
Do you cover all London areas
Yes. We cover all London boroughs and areas around the M25. We can survey where needed and deliver full drawing packs.
Can you provide Building Regulations drawings
Yes. Building Regulations packs are recommended for loft conversions and include key compliance notes for fire, stairs, insulation, and coordination with structure.
How do I get a quote quickly
Use the form, call, or WhatsApp. The fastest is WhatsApp with postcode and roof photos so we can advise the best loft type.
Ready to plan your loft conversion
Get a fixed quote for loft conversion drawings with structural engineering coordination. We cover all London boroughs and the M25.