167-169 Great Portland Street, London United Kingdom
IStructE & Eurocode Compliant Building Regs Part A Approved
Core Specialism

1. Structural Engineering & Calculations

National Engineers UK prepares comprehensive structural calculation packages in full compliance with UK Building Regulations Part A (Structure) and British/Eurocodes (BS EN 1990 to 1999).

RSJ Steel Beam Calculations

Sizing of Universal Beams (UB) and Universal Columns (UC) for internal load-bearing knock-throughs, bi-fold door spans, and roof loadings.

  • Bending moment & shear force verification
  • Deflection limit compliance (L/360)
  • Padstone design & masonry bearing checks

Load-Bearing Wall & Chimney Removal

Safe structural designs for removing spine walls and ground/first floor chimney breasts, restoring space without risk of subsidence or cracking.

  • Gallows bracket support calculations
  • Trimming steel beams across chimney stacks
  • Party wall surveyor coordination packs

Foundation & Substructure Design

Tailored foundation engineering for clay soils, tree root zones, made ground, and underpinning of adjacent party structures.

  • Strip & trench fill foundation design
  • Reinforced concrete raft foundation designs
  • Mass concrete underpinning calculations
Design & Planning

2. Architectural Planning & Drawings

High-end architectural plans optimized for maximum living space, natural daylight, and guaranteed compliance with UK planning policies.

Planning Permission Applications

Complete submission packs for Full Planning Permission, Householder Applications, and Conservation Area consents.

  • 1:50 / 1:100 existing & proposed floor plans
  • Contextual elevations & cross-sections
  • Planning Portal submission & officer liaison

Permitted Development (LDC)

Obtain legally binding Lawful Development Certificates without full planning permission under the General Permitted Development Order (GPDO).

  • Rear extensions up to 6m or 8m (Prior Approval)
  • Loft conversions up to 40m³ or 50m³ volume
  • 100% legal confirmation for future property sale

Measured Building Surveys

State-of-the-art laser surveying ensuring millimetre precision of your existing layout, structural walls, and service points.

  • On-site laser scanning across Greater London
  • Digital CAD drawings in DWG & PDF format
  • Level datum & boundary checks
Residential Transformations

3. House Extensions & Loft Conversions

Rear & Side Return Extensions

Unlock stunning open-plan dining and kitchen extensions with seamless garden integration and structural picture-frame steelwork.

Discuss Extension ›

Dormer & Mansard Loft Conversions

Convert dead roof space into a luxurious master suite, home office, or kids' playroom with engineered ridge beams and fire corridors.

Discuss Loft Conversion ›

HMO & Flat Conversions

Converting single-family dwellings into high-yielding self-contained flats or licensed HMOs compliant with fire and sound regulations.

Discuss Conversion ›
Statutory Approvals

4. Building Regs, Thames Water & Party Wall

Full Plans Building Regs Pack

Construction-ready architectural detail sheets, thermal insulation build-ups (Part L), ventilation schemes, and acoustic details for LABC.

Thames Water Build Over Agreement

Engineering drawings and foundation bridging details required whenever building within 3m of a public sewer or shared manhole.

Party Wall Notices & Awards

Statutory notices under the Party Wall etc. Act 1996, schedules of condition, and Party Wall Awards to safeguard legal relationships with neighbours.

Need Advice On Which Service You Need?

Our senior UK engineers are ready to review your property details and advise whether your scheme qualifies under Permitted Development or requires Full Planning.

Call 020 8050 5232