Building Control Drawings & Calculations
Technical drawings and structural calculations your builder needs to construct your extension. We handle the full Building Regulations application so you can focus on your project.
What's Included in Our Service
Everything you need for Building Control approval, prepared by qualified professionals.
Building Regulations Drawings
Detailed technical drawings showing construction methods, materials, insulation, ventilation, and drainage. These drawings give your builder everything they need to construct your extension to current building standards.
Structural Calculations
Engineering calculations for steelwork, foundations, lintels, and load-bearing elements. Prepared by qualified structural engineers and required for Building Control approval.
SAP Calculations
Standard Assessment Procedure calculations to demonstrate your extension meets energy efficiency requirements. Required for all new extensions and conversions.
Ventilation Calculations
Calculations showing adequate ventilation for habitable rooms, kitchens, bathrooms, and utility areas. Ensures healthy air quality and compliance with Part F.
Building Regulations We Cover
Our drawings address all relevant parts of the Building Regulations.
Part A: Structure
Structural stability, foundations, and load-bearing elements
Part B: Fire Safety
Fire detection, escape routes, and fire-resistant materials
Part C: Site Preparation
Damp proofing, drainage, and ground conditions
Part L: Conservation of Energy
Insulation, glazing, and energy efficiency
Part F: Ventilation
Air quality, extraction, and background ventilation
Part H: Drainage
Foul and surface water drainage systems
Our Building Control Process
From initial assessment to approved drawings in 7-11 weeks.
Initial Assessment
We review your planning approved drawings and discuss your construction requirements.
Site Survey
Detailed measurements and assessment of existing structure, drainage, and ground conditions.
Drawing Production
We create comprehensive building regulations drawings showing all technical details.
Structural Design
Our structural engineers calculate steelwork, foundations, and load-bearing requirements.
Building Control Submission
We submit your application to Building Control and handle any queries.
Approval & Handover
You receive approved drawings ready for your builder to start construction.
When Do You Need Building Control Drawings?
You Need Building Regs For:
- House extensions (all types)
- Loft conversions
- Garage conversions
- Kitchen extensions
- Change of use projects
- Internal structural alterations
- New windows and doors
- Electrical work
- New heating systems
Our Building Regs Package Includes:
- Detailed construction drawings
- Foundation design
- Structural calculations
- Steel beam specifications
- SAP energy calculations
- Ventilation calculations
- Drainage layouts
- Building Control submission
- Query handling & revisions
Frequently Asked Questions
Planning drawings show what your extension will look like — the size, position, and appearance. Building control drawings (also called building regulations drawings) show how it will be built — the construction methods, materials, insulation, structural support, and drainage. Planning comes first, then building regs.
Yes. Building Regulations approval is a legal requirement for almost all structural work, including extensions, loft conversions, garage conversions, and change of use projects. You cannot start construction without it.
Planning drawings rarely contain enough technical detail for building control. They show the design intent but not construction methods, structural calculations, or material specifications. We produce a separate, more detailed set of drawings for Building Control.
SAP (Standard Assessment Procedure) calculations demonstrate that your extension meets energy efficiency requirements. They assess insulation, heating, and ventilation to ensure compliance with Part L of the Building Regulations.
Yes. We work with qualified structural engineers to provide all necessary structural calculations for steelwork, foundations, lintels, and load-bearing elements as part of our Building Control package.
Building Control approval typically takes 5-8 weeks from submission. The full process from initial assessment to approved drawings usually takes 7-11 weeks depending on complexity.
We handle all queries from Building Control on your behalf. If changes are requested, we revise the drawings and resubmit at no additional cost within the agreed scope.
Absolutely. Many clients come to us after planning approval. We can take your approved planning drawings and produce the full Building Regulations package needed to start construction.
Ready to Start Your Building Regs Application?
Get a quote for building control drawings and structural calculations. We handle the entire Building Regulations process so your builder can get started.