Clear advice, practical designs and project coordination from start to finish.
Stephens Engineering Group design is shaped by your ideas, current standards, compliance and modern engineering practice. Using agreed design guidelines, technical reports and architectural layouts, we develop intelligent, compliant designs that maximise visual impact while improving energy efficiency and long-term performance.
Technical electrical and building services design for commercial refurbishments, new builds and fit-outs — from early feasibility through to detailed design packages ready for tender.
Lighting design and emergency lighting strategy for commercial buildings — performance, compliance and energy use specified properly from the outset.
Independent technical review for building owners and managing agents — assessing existing installations and producing clear, prioritised action plans.
For clients who need works delivered, not just designed — technical scope control, procurement support and site coordination, with design authority staying with SEG throughout.
Technical documentation review and close-out support to ensure installations are properly certified and handed over.
Whether you're at concept stage, mid-project or coordinating delivery — SEG provides technical input with clear scope and a single point of contact.
Electrical and lighting design input from concept through to tender — technical direction that integrates with your design process.
Electrical survey input, feasibility advice and budget scopes for refurbishment and acquisition projects.
Design support, technical submissions and load calculations — strengthening delivery without an in-house design team.
Electrical design, compliance review and managed works for commercial buildings — one technical point of contact throughout.
Every instruction follows the same structured approach — from initial review through to completion documentation. Technical coordination stays with SEG throughout.
We review the building, project requirement, available information, compliance position and constraints before any scope is developed.
We develop a clear scope, assumptions, exclusions, technical requirements and deliverables — nothing left open to interpretation.
We support procurement, technical queries, programme coordination and suitable delivery routes — keeping the client informed throughout.
We monitor technical information, quality evidence, certificates, records and completion documentation as works progress.
We ensure final handover information is complete and properly evidenced, ready for sign-off.
Whether you're at concept stage, mid-project or managing an existing building — these are the most common ways we get started. All scoped to your project, building and timeline.
For architects, developers and project teams who need electrical design input from concept through to tender-ready packages.
For refurbishments and upgrades where lighting performance, compliance and energy use need to be got right — modelled, surveyed and specified.
For refurbishments, change-of-use projects and acquisitions needing a clear picture of the existing installation before design or works begin.
For landlords and contractors adding solar PV or EV charging — sized correctly against existing supply, with a clear path through DNO and grid requirements.
Why clients work with SEG
Stephens Engineering Group is a South Wales–based electrical consultancy established in 2024, working with architects, developers and contractors across Cardiff, Newport, Bristol and the wider UK.
Founded by Aaron Stephens, every instruction is handled at senior level — design, Part L and decarbonisation strategy, and renewable integration considered together from the first conversation, not bolted on afterward.
Whether you have drawings, a brief, an existing building or just an idea — we're happy to have an early conversation. Based in South Wales, working across Bristol, Cardiff and the wider UK.