# Smith Design Engineering (SDE) > Smith Design Engineering is a building services engineering consultancy designing mechanical, electrical and public health systems for buildings across the United Kingdom, at RIBA Stages 0 to 7. - Legal name: Smith Design Engineering Ltd - Companies House number: SC713846 - Jurisdiction: United Kingdom - Disciplines: mechanical, electrical, public health - RIBA stages: 0 to 7 Not to be confused with other organisations abbreviated "SDE". This entity is identified by Companies House number SC713846. ## Services - [BIM and digital delivery](https://www.smithde.co.uk/services/digital): Revit modelling, clash detection and information management to BS EN ISO 19650 for MEP design and coordination. - [BIM modelling at every level of detail](https://www.smithde.co.uk/services/bim-modelling-lod): MEP models produced at the level of information need the stage requires, from LOD 100 massing to LOD 500 as-installed record. - [BMS and controls design](https://www.smithde.co.uk/services/bms-and-controls): Building management system and controls design, including control philosophy, points schedules and commissioning requirements. - [BREEAM MEP design and credit support](https://www.smithde.co.uk/services/breeam-mep): Building services design and evidence for the BREEAM credits the MEP engineer controls — energy, water, health and wellbeing, and pollution. - [Building services surveys and compliance](https://www.smithde.co.uk/services/surveys-and-compliance): Condition surveys, electrical periodic inspection reporting and statutory compliance audits for existing buildings. - [COBie data delivery](https://www.smithde.co.uk/services/cobie-data-delivery): COBie deliverables to BS 1192-4, with asset data structured, populated and validated against the employer information requirements. - [Domestic water services design](https://www.smithde.co.uk/services/water-services-design): Domestic water services design with calculated demand, sized storage and generation, and legionella risk designed out at layout stage. - [Drainage design](https://www.smithde.co.uk/services/drainage-design): Above and below ground drainage design to BS EN 12056 and BS EN 752, including stack sizing, gradients and adoption requirements. - [Dynamic thermal modelling and overheating assessment](https://www.smithde.co.uk/services/thermal-modelling-and-overheating): Dynamic simulation for overheating risk, comfort and energy — TM52, TM59, Approved Document O and TM54 — run while the facade can still change. - [Electrical services design](https://www.smithde.co.uk/services/electrical): LV distribution, lighting, small power, fire alarm and life safety design to BS 7671:2018+A4:2026 for buildings across the UK. - [Emergency lighting design](https://www.smithde.co.uk/services/emergency-lighting-design): Emergency escape lighting design to BS 5266-1:2025, covering escape routes, open areas, high risk task areas and testing provision. - [Fire alarm and detection design](https://www.smithde.co.uk/services/fire-alarm-design): Fire detection and alarm system design to BS 5839-1:2025, with the system category agreed against the fire strategy. - [Full BIM services and information management](https://www.smithde.co.uk/services/bim-information-management): The BS EN ISO 19650 information management role: BIM Execution Plan, information requirements, common data environment, federation and delivery reporting. - [Gas services design](https://www.smithde.co.uk/services/gas-services-design): Natural gas and LPG installation design — supply capacity, pipe sizing, ventilation and the safety requirements of IGEM standards. - [Heat pump and low carbon heat design](https://www.smithde.co.uk/services/heat-pump-design): Heat pump design for new build and retrofit — flow temperature and emitter sizing, hot water and legionella control, electrical capacity and acoustics. - [Heating and cooling design](https://www.smithde.co.uk/services/heating-and-cooling-design): Heating and cooling design — HVAC loads, plant selection and a control philosophy that can be commissioned. - [LV distribution design](https://www.smithde.co.uk/services/lv-distribution-design): Low voltage distribution design including maximum demand, cable sizing, volt drop, earth fault loop impedance and discrimination. - [Lighting and emergency lighting design](https://www.smithde.co.uk/services/lighting-design): Interior, exterior and emergency lighting design to BS EN 12464-1:2021 and BS 5266-1:2025, with calculated illuminance, glare and uniformity. - [M&E dilapidations surveys](https://www.smithde.co.uk/services/dilapidations): Mechanical and electrical input to schedules of dilapidations, for landlords and tenants — what the lease actually requires, costed, and defensible. - [MEP coordination workshops](https://www.smithde.co.uk/services/mep-coordination-workshops): Chaired workshops that resolve MEP clashes against the architectural and structural models, with every decision recorded, assigned and closed out. - [Mechanical services design](https://www.smithde.co.uk/services/mechanical): Heating, ventilation, cooling and controls design for commercial, retail, education and industrial buildings across the UK. - [Net zero and energy strategy](https://www.smithde.co.uk/services/net-zero-and-energy-strategy): Energy strategy for planning and for real performance — the hierarchy, the options appraisal, and the gap between the compliance model and the meter. - [Non-domestic EPCs and energy assessment](https://www.smithde.co.uk/services/epc-non-domestic): Level 3, 4 and 5 non-domestic EPCs, lodged by an accredited assessor, with the recommendation report and the Scottish Section 63 action plan where it applies. - [Part L compliance modelling, England and Wales](https://www.smithde.co.uk/services/sbem-part-l): Non-domestic Part L compliance modelling and BRUKL reporting at design and as-built stage, run early enough to change the design rather than to report on it. - [Passivhaus building services design](https://www.smithde.co.uk/services/passivhaus-design): Building services design for Passivhaus certification, including PHPP input, ventilation strategy and the low-load plant selection it requires. - [Public health engineering](https://www.smithde.co.uk/services/public-health): Hot and cold water services, above and below ground drainage, gas and rainwater design to CIBSE Guide G and the relevant water byelaws. - [Revit MEP modelling, RIBA Stages 0 to 7](https://www.smithde.co.uk/services/revit-mep-modelling): Revit MEP modelling through every RIBA stage — concept space reservation, spatial coordination, technical design and record model. - [Section 6 energy compliance, Scotland](https://www.smithde.co.uk/services/sbem-section-6): SBEM and dynamic simulation modelling for Section 6 compliance in Scotland, produced as part of the building warrant application rather than after it. - [Security systems design](https://www.smithde.co.uk/services/security-systems-design): Access control, intruder alarm and CCTV design — zoning, containment and interfaces resolved with the fire and escape strategy. - [Small power and data design](https://www.smithde.co.uk/services/small-power-and-data): Small power layouts and structured cabling design — final circuits, containment, comms rooms and the loads a fit-out actually draws. - [Stage 5 contractor design](https://www.smithde.co.uk/services/stage-5-contractor-design): MEP design for contractors and design-and-build appointments: Stage 4 taken to installation information, or the contractor design portion produced outright. - [Sustainability and net zero design](https://www.smithde.co.uk/services/sustainability): Part L and Section 6 compliance, energy modelling, heat decarbonisation and Passivhaus design for buildings across the UK. - [TM65 embodied carbon assessment](https://www.smithde.co.uk/services/tm65-embodied-carbon): Embodied carbon of MEP systems to CIBSE TM65, for whole life carbon assessments and for choosing between plant on more than capital cost. - [Utilities and renewables design](https://www.smithde.co.uk/services/utilities-and-renewables): Incoming supply applications, substation and metering requirements, and PV, battery storage and EV charging design and connection. - [Ventilation design](https://www.smithde.co.uk/services/ventilation-design): Natural, mechanical and mixed-mode ventilation design to Approved Document F or Technical Handbook Section 3, with calculated rates. ## Sectors - [Banking and financial services](https://www.smithde.co.uk/sectors/banking-and-financial-services): MEP design for branch networks and financial services offices, with resilience, security integration and out-of-hours delivery. - [Commercial offices](https://www.smithde.co.uk/sectors/commercial-offices): MEP design for new build and refurbished office buildings, from shell and core through to Cat A and Cat B fit-out. - [Education](https://www.smithde.co.uk/sectors/education): MEP design for schools, colleges and university buildings, including ventilation, acoustics and laboratory services. - [Funeral care](https://www.smithde.co.uk/sectors/funeral-care): MEP design for crematoria and funeral facilities — a public ceremonial building and a permitted combustion process under one roof, which have to be kept apart. - [Healthcare](https://www.smithde.co.uk/sectors/healthcare): MEP design for primary care, dental and clinical premises, designed to the relevant Health Technical Memoranda. - [Hospitality](https://www.smithde.co.uk/sectors/hospitality): MEP design for hotels, restaurants and leisure, including guest comfort, commercial kitchens and high hot water demand. - [Industrial and logistics](https://www.smithde.co.uk/sectors/industrial-and-logistics): MEP design for warehouses, distribution centres and light industrial units, including process services and high bay lighting. - [Listed buildings and heritage](https://www.smithde.co.uk/sectors/listed-buildings-and-heritage): MEP design in listed and conservation area buildings, where the services strategy and the heritage consent are developed together rather than in sequence. - [Residential](https://www.smithde.co.uk/sectors/residential): MEP design for apartment buildings and housing, including heat networks, ventilation and overheating assessment. - [Retail](https://www.smithde.co.uk/sectors/retail): MEP design for stores, supermarkets and retail parks, including landlord shell provision and tenant fit-out to brand standards. - [Science and laboratories](https://www.smithde.co.uk/sectors/science-and-laboratories): MEP design for laboratory and research buildings — containment, fume cupboard ventilation, pressure regimes, resilience and the energy cost of once-through air. - [Sport and leisure](https://www.smithde.co.uk/sectors/sport-and-leisure): MEP design for pools, sports halls and gyms — pool hall humidity and corrosion, high ventilation loads, and lighting to the standard the sport requires. - [Student accommodation](https://www.smithde.co.uk/sectors/student-accommodation): MEP design for purpose-built student accommodation — hot water diversity, heat networks and metering, overheating, and a fire strategy for unfamiliar occupants. ## Articles - [Why MEP design fees fall as a percentage when project value rises](https://www.smithde.co.uk/articles/why-mep-fees-fall-as-project-value-rises): A flat percentage fee is either too high on large projects or unsustainable on small ones. What actually drives the sliding scale. - [Building warrant or Building Regulations approval: what changes when you cross the border](https://www.smithde.co.uk/articles/building-warrant-vs-building-regulations-approval): Scotland requires approval before work starts. England does not always. The difference reshapes the design programme, not just the paperwork. - [Computational automation and AI in building services design](https://www.smithde.co.uk/articles/computational-automation-in-building-services-design): Much design engineering time goes on transcription, not judgement. What happens to carbon, and to competence, if that part is automated. - [Certifying the unfamiliar: extending the Passivhaus standard to non-residential building types](https://www.smithde.co.uk/articles/passivhaus-non-residential-building-types): Passivhaus is described as building-type agnostic, but its thresholds derive from dwellings. Applying it to a hotel or school relocates the difficulty. ## Key pages - [Services](https://www.smithde.co.uk/services) - [Projects](https://www.smithde.co.uk/projects) - [Coverage](https://www.smithde.co.uk/coverage) - [Practice news](https://www.smithde.co.uk/news) - [People](https://www.smithde.co.uk/people) - [MEP design fee estimator](https://www.smithde.co.uk/fee-estimator) — indicative range only, not a quotation - [Governance and policies](https://www.smithde.co.uk/governance) - [Contact](https://www.smithde.co.uk/contact) - [Privacy notice](https://www.smithde.co.uk/privacy) - [Full sitemap](https://www.smithde.co.uk/sitemap) ## Full text - [https://www.smithde.co.uk/llms-full.txt](https://www.smithde.co.uk/llms-full.txt) — the text of every indexable page in a single fetch, so the pages above do not need to be requested individually.