National Engineers UK is your trusted multi-disciplinary consultancy for planning permission drawings, certified structural calculations, RSJ beam sizing, and full building control packages. Delivering seamless, council-approved solutions for homeowners, builders, and property developers.
Get a fast quote & advice from our chartered engineers
Headquartered at 167-169 Great Portland Street in Central London, National Engineers UK brings rigorous technical excellence, deep UK planning expertise, and builder-ready clarity to every residential and commercial project.
Navigating UK planning rules (Town and Country Planning Act) and Building Regulations (Approved Documents A to S) can be a minefield of council delays and unexpected costs. At National Engineers UK, our certified structural engineers and architectural designers streamline the entire journey.
Certified Engineering Standards
Select your project type, scope of architectural or structural work, and desired turnaround to receive an instant transparent fee estimate.
From initial planning drawings and lawful development certificates to complex finite element structural calculations and party wall agreements, we cover every angle of UK residential and commercial building work.
Comprehensive structural calculation packages for Building Control approval. Compliant with Eurocode 3, BS 5950, and BS 5268 for steel, concrete, and timber.
Creative, functional architectural drawings tailored for UK council planning submissions and Permitted Development (Lawful Development Certificates).
Create modern open-plan kitchen and living spaces safely. Complete beam, pillar, and foundation load distribution calculations for internal wall knock-throughs.
Specialist engineering and design for single storey rear, side infill, wrap-around, and double storey extensions under Permitted Development or Full Planning.
Maximise your property value with an extra master bedroom and en-suite. Comprehensive structural steel ridge beams, trimmer joists, and architectural floor plans.
Full compliance documentation for Building Control sign-off, Thames Water Build Over Agreements, and Party Wall etc. Act 1996 statutory notices.
Whether you submit a Full Plans Application to your Local Authority Building Control (LABC) or hire an Approved Inspector, our drawings and structural calculations are pre-checked to satisfy all relevant Approved Documents.
Rigorous checks on load-bearing capacities, deflection limits, foundation design, and structural steel beams (Eurocode 3).
Escape windows, 30-minute fire resistant door sets, structural steel encasement, and fire stopping details for loft conversions.
U-value calculations for roofs, external cavity walls, floor slabs, and high-performance glazing specifications.
Foul and surface water drainage layouts, soakaways, and Thames Water public sewer bridging foundations.
A seamless, transparent four-step engineering journey from your first free consultation to on-site builder handover.
We evaluate your architectural ideas, planning history, property deeds, and local council constraints. We provide transparent fixed pricing upfront.
Our team carries out a high-accuracy laser survey of your property, drafting existing drawings and exploring modern proposed layouts with you.
We submit your planning application or Lawful Development Certificate to your local council, acting as your authorized planning agent throughout.
Our Chartered Engineers calculate all RSJ steel beams, padstones, and timber structures, delivering a complete Building Control pack ready for your builder.
We handle planning policies and local building control officers across all 32 London boroughs, Greater London, and nationwide England & Wales.
See what our clients say about our prompt delivery, precise structural calculations, and seamless council approvals.
"National Engineers UK did our structural calculations for a 5.2m rear knock-through in Fulham. The RSJ steel beam sizing was approved by Wandsworth Building Control without a single query. Outstanding 48-hour delivery!"
"We used them for both architectural drawings and structural engineering for our L-shaped dormer loft conversion. Having both services under one roof saved us thousands and weeks of coordination headaches."
"As a building contractor in North London, finding engineers who provide clear, practical fabrication drawings is rare. National Engineers UK are now our go-to engineering consultancy. Highly recommended."
Everything you need to know about architectural planning, structural calculations, and UK building control.
Architectural drawings illustrate the visual design, spatial layout, heights, elevations, materials, and room dimensions required for Planning Permission or Permitted Development. Structural calculations are technical mathematical packages prepared by engineers determining the steel beams (RSJs), foundations, padstones, and load paths to prove the building will stand safely under Building Regulations Part A.
Yes, 100%. All our structural calculation packs are prepared in strict accordance with British Standards (BS) and Eurocodes (BS EN 1990 to 1999). We guarantee approval, and in the rare event that your council building control officer has technical queries, our engineers respond directly and make any adjustments free of charge.
For standard single or double knock-through wall removals, our standard turnaround is 3 to 5 business days. We also offer an Express Fast-Track service where calculations are completed and stamped within 48 to 72 hours for urgent contractor timelines.
If you are building an extension or foundation within 3 metres of a public sewer or lateral drain (shared with neighbours), statutory water authority approval is mandatory before building work starts. We handle CCTV drainage surveys, foundation bridging details, and application submissions for Thames Water, Anglian Water, and Southern Water.
National Engineers UK holds comprehensive Professional Indemnity Insurance (£2,000,000+) and Public Liability Insurance. Certificates of indemnity are readily provided for council submissions, party wall surveyors, and mortgage lenders.
Visit our Central London office or contact our senior engineering team directly for prompt advice, drawings review, or a site survey booking.
Attach your sketches, estate agent floor plans, or planning references for an immediate appraisal.
