We Specialise Design & Build Services

Unlike many of our competitors, Sigma have the design and build experience “in house” with extensive building services design experience. This means we have the technical and commercial experience to identify and specify the most cost effective engineering solutions based around bespoke client requirements both present and future.

Our designers use a number of modelling tools to create digital representations of all the physical and functional characteristics of your building. This allows us to identify all aspects of every design ensuring critical route paths are assessed prior to submission or consideration.

We offer a complete solution from design through to installation and full project management, ensuring 100% snag free projects with outstanding customer service.

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Our Mechanical Service

Eco Energy

Concept Planning & Feasibility

We help you define scope, understand project constraints and develop functional, cost-efficient proposals.

Design

Technical Design & Coordination

Our teams coordinate architecture, structural design and building services to ensure the solution works as a complete system.

refurb

Construction & Fit-Out

We manage the build phase with experienced site teams, robust safety control and clear programme management.

Electrical

Mechanical, Electrical & Fabric Integration

As a building services specialist, we ensure that the M&E and building fabric elements are fully coordinated and installed to the highest standard.

moving

Refurbishment & Reconfiguration Projects

We modernise and restructure existing spaces to enhance usability, workflow and operational quality.

plumbing

Handover, Commissioning & Support

Once works are complete, we provide full documentation, commissioning records and ongoing support if required.

How We Work

Simple → Effective → Secure

Sigma Building Services

Initial consultation

We discuss your needs and assess the site.

Sigma Building Services

Tailored specification

We design the right solution (whether upgrade, install or refurbishment).

Sigma Building Services

Professional installation

Our directly-employed workforce carries out the work to the highest standard.

Sigma Building Services

Testing & hand-over

All installations fully tested and safe to hand over

Sigma Building Services

Maintenance & support

We support you after installation, offering ongoing service and maintenance.

Sigma Fire Security

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    Contact Details

    Ready to secure your London or Kent property with best-in-class building services? Contact Sigma Building Services today for a no-obligation site survey.

    FAQs

    Design & Build is a project delivery method where one contractor manages both design and construction, improving coordination and cost certainty.

    We deliver commercial, education, healthcare, public sector, industrial and workplace refurbishment and fit-out projects.

    Yes. We provide concept planning, technical design, construction delivery and handover.

    Yes. We are experienced in delivering refurbishment and build works in operational spaces with safety and continuity planning.

    Yes. We deliver complete internal reconfigurations and refurbishments, including mechanical, electrical and finishing works.

    Yes. This is one of our key strengths as a building services-led contractor.

    Yes. We can work with your existing consultants or provide full in-house coordination.

    Yes. We provide feasibility studies and budget estimating.

    Yes. We produce clear timelines and update clients throughout the project.

    Yes. We often phase works to keep buildings partially operational.

    Yes. We help coordinate building regulations, planning requirements and applicable standards.

    Yes. We frequently integrate LED, heating efficiency, ventilation and BMS improvements.

    Full commissioning records, warranties, O&M manuals and compliance certification.

    Yes. Maintenance packages can be arranged if required.

    We follow strict H&S management procedures and risk-controlled work sequencing.

    Yes. We have experience working in listed and sensitive environments.

    Yes. Our team delivers projects of varying scale depending on client needs.

    Yes. We plan and create layouts that support workflow, comfort and productivity.

    Yes. We offer no-obligation initial consultations and site assessments.

    Contact us by phone or email to arrange a project discussion and site review.

    Accreditations

    ECA Reg Mem
    Chas
    NIC EIC
    RCP
    ISO9001
    ISO14001
    Achilles member

    Our Clients

    Department of Health
    Emcor
    Thames Water
    Taylor Wimpey
    Mitchell
    Hutton Construction