Office Fit-Out Technology Infrastructure in London

CAT A and CAT B office fit-outs

Whether you are delivering the landlord’s base infrastructure or the tenant’s finished workplace, ACCL’s engineers deliver both to the same standard.

• CAT A office infrastructure: the essential base-build technology layer that prepares a building for occupation: Cat6/Cat6A cabling, fibre optic backbone, communications rooms, data cabinets, containment, riser cabling, patch panels, building distribution, earthing and bonding, labelling, testing and certification.
• CAT B workplace fit-outs: transforming an empty office into a fully functioning workplace: desk data cabling, floor box and under-floor cabling, furniture connectivity, enterprise Wi-Fi, AV infrastructure, access control, CCTV, digital signage cabling and comms cabinet patching, tested and documented before handover.

Comms rooms, cabinets and collaboration spaces

• Comms rooms, cabinets and containment: we plan the data centre environment, server and network cabinets and containment at design stage, with capacity for day-one requirements and future expansion.
• Power, cooling and environmental coordination: UPS provision, cooling and environmental monitoring for comms rooms and cabinets, coordinated with the wider M&E installation so the network has the power and environment it needs from day one.
• Audio visual and collaboration spaces: cabling and infrastructure for Microsoft Teams and Zoom Rooms, video conferencing, interactive displays and digital signage, installed so the AV integrator can commission each room reliably.
• Digital signage and room-booking technology: cabling for digital signage, wayfinding and room-booking panels outside meeting spaces, coordinated alongside the rest of the fit-out’s technology infrastructure rather than added on afterward.

Pre-construction cost planning for electrical estimating teams

ACCL’s involvement often begins before a specification exists. Working alongside consultants and electrical estimating departments, we help develop realistic technology infrastructure budgets from the earliest design stages. This covers the RIBA Plan of Work from Stage 2 concept design through Stage 3 spatial coordination and Stage 4 technical design and tender submission, while there is still time to control cost.

Where a design is still incomplete, ACCL provides sensible, clearly flagged budget allowances based on building size, occupancy, workstation numbers and comparable projects, rather than leaving estimating teams to guess.

Estimating support we provide

• Budget cost plans: early-stage feasibility budgets when information is still limited.
• Cost planning: detailed elemental pricing for commercial developments.
• Tender pricing: competitive subcontract pricing to agreed deadlines, often returned within 24 to 48 hours for smaller budget estimates.
• Value engineering: alternative products and installation methods that protect performance while improving project value.
• Design review: technical verification prior to tender to catch omissions and coordination issues before they become variations.
• Programme advice: realistic installation durations and resourcing, based on actual site conditions rather than generic estimating-software defaults.
• Risk identification: flagging the design assumptions behind every budget so the right contingency can be applied, and reducing costly variations after contract award.

The ACCL 3 dB Infrastructure Assurance

Unlike most technology infrastructure contractors, ACCL builds this exclusive assurance into every qualifying fit-out project. By designing and testing installations to tighter performance margins than standard certification alone, clients benefit from infrastructure engineered for long-term reliability, with added confidence that today’s installation will continue to support tomorrow’s technologies.

Trusted on London office fit-outs

ACCL’s estimating and pre-construction teams have supported CAT A and CAT B office fit-out projects for main contractors and fit-out specialists including Mace, ISG, Overbury, Structure Tone, Parkeray, Bouygues UK, JLL and Tétris.

Why fit-out teams and estimators choose ACCL

• Single-source pricing across cabling, Wi-Fi, CCTV and access control
• Fast budget pricing and detailed tender submissions
• Engagement from RIBA Stage 2, before the specification is fixed
• Commercially realistic labour allowances for live, occupied and phased sites
• Value engineering and design-review recommendations
• ISO 9001, ISO 14001 and ISO 45001 certified; Constructionline registered
• £10m public liability, £10m products liability, £1m professional indemnity, £300k contractors all risks cover

Our fit-out delivery process

Eight steps from the first conversation to an office ready to occupy.

• Consultation: Understand the project’s objectives, occupancy and technology strategy.
• Survey: Assess the site and existing infrastructure.
• Design and cost planning: Develop scalable infrastructure and, where needed, budget or tender pricing.
• Coordination: Align with consultants, contractors and client teams.
• Installation: Professional delivery by experienced commercial engineers.
• Testing and certification: Fluke certification plus the 3 dB Infrastructure Assurance.
• Documentation: Test results, labelling, as-built drawings and O&M manuals.
• Handover: A fully commissioned infrastructure, ready for immediate occupation.

Refurbishment and relocation

A fit-out project doesn’t always start from an empty shell. ACCL regularly works within occupied commercial environments, delivering upgrades and relocations around live business operations through out-of-hours and weekend working, phased programmes, legacy cabling removal and Cat5-to-Cat6A migrations. For ongoing moves, adds and changes outside a full fit-out project, see our office cabling service.

Planning an office fit-out?

Whether you need an early-stage budget estimate, a fully detailed technology infrastructure cost plan, or delivery of a CAT A or CAT B fit-out, ACCL provides the technical and commercial expertise to strengthen your project from concept through to handover.