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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Concept Planning & Feasibility
We help you define scope, understand project constraints and develop functional, cost-efficient proposals.
Technical Design & Coordination
Our teams coordinate architecture, structural design and building services to ensure the solution works as a complete system.
Construction & Fit-Out
We manage the build phase with experienced site teams, robust safety control and clear programme management.
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.
Refurbishment & Reconfiguration Projects
We modernise and restructure existing spaces to enhance usability, workflow and operational quality.
Handover, Commissioning & Support
Once works are complete, we provide full documentation, commissioning records and ongoing support if required.
How We Work
Simple → Effective → Secure
Initial consultation
We discuss your needs and assess the site.
Tailored specification
We design the right solution (whether upgrade, install or refurbishment).
Professional installation
Our directly-employed workforce carries out the work to the highest standard.
Testing & hand-over
All installations fully tested and safe to hand over
Maintenance & support
We support you after installation, offering ongoing service and maintenance.
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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
What does Design & Build mean?
Design & Build is a project delivery method where one contractor manages both design and construction, improving coordination and cost certainty.
What types of Design & Build projects do Sigma BS undertake?
We deliver commercial, education, healthcare, public sector, industrial and workplace refurbishment and fit-out projects.
Do you manage both design and construction stages?
Yes. We provide concept planning, technical design, construction delivery and handover.
Can you work in occupied buildings?
Yes. We are experienced in delivering refurbishment and build works in operational spaces with safety and continuity planning.
Do you offer interior fit-out services?
Yes. We deliver complete internal reconfigurations and refurbishments, including mechanical, electrical and finishing works.
Can you coordinate mechanical and electrical systems during the build?
Yes. This is one of our key strengths as a building services-led contractor.
Do you work with architects and consultants?
Yes. We can work with your existing consultants or provide full in-house coordination.
Can you help develop early cost plans and scope definitions?
Yes. We provide feasibility studies and budget estimating.
Do you provide detailed programmes of work?
Yes. We produce clear timelines and update clients throughout the project.
Can you deliver phased works?
Yes. We often phase works to keep buildings partially operational.
Do you handle planning and compliance?
Yes. We help coordinate building regulations, planning requirements and applicable standards.
Do you offer sustainable or energy-efficient upgrade options?
Yes. We frequently integrate LED, heating efficiency, ventilation and BMS improvements.
What is included at project handover?
Full commissioning records, warranties, O&M manuals and compliance certification.
Do you provide ongoing maintenance after completion?
Yes. Maintenance packages can be arranged if required.
How do you ensure safety during construction?
We follow strict H&S management procedures and risk-controlled work sequencing.
Can you refurbish old or heritage buildings?
Yes. We have experience working in listed and sensitive environments.
Do you take on small and medium projects as well as large builds?
Yes. Our team delivers projects of varying scale depending on client needs.
Can you improve workspace layouts during refurbishment?
Yes. We plan and create layouts that support workflow, comfort and productivity.
Do you provide free surveys or consultations?
Yes. We offer no-obligation initial consultations and site assessments.
How do I get a quote for a Design & Build project?
Contact us by phone or email to arrange a project discussion and site review.
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