Office Fit Out Sussex & South East

Fit Out Cost Calculator

Office Spaces delivered by Fit Out & Refurbishment Specialists

Faction Interiors delivers commercial office fit outs across Sussex and the South Coast. Whether you're relocating to a new space, refurbishing an existing office, or handing over a CAT A space to a new tenant, our team manages the full project from initial design through to handover.

Cat A Fit Out

The base build. This takes an empty shell to a standard that makes the space occupiable: raised floors, suspended ceilings, basic M&E (mechanical and electrical), and surface finishes. Cat A work is typically commissioned by landlords preparing a space for a new tenant.

Cat B Fit Out

The full workplace. This takes a Cat A space and transforms it into a fully operational office tailored to your business: partitioned meeting rooms, breakout areas, branded reception, bespoke joinery, IT infrastructure, kitchen and welfare facilities. This is what most businesses commission when they're moving in or refurbishing.

Space Planning and Interior Design

Space planning and design is the foundation of any successful office fit out. Before a single partition goes up, we work with you to understand how your team uses space. How you collaborate, focus, meet and move, and translate that into a layout that makes your office work harder for your business.

Design & Build

Design and build means a single contract, a single point of responsibility, and no gap between what's drawn and what gets built. We handle design, specification, procurement and construction under one roof so there's no finger-pointing between a designer and a contractor when decisions need to be made on site.

What is an Office Fit Out?

An office fit out is the process of transforming an empty or underused commercial space into a fully functioning workplace. It covers everything from partitioning, ceilings and floor finishes through to lighting, joinery, kitchens and MEP depending on your specification and starting point.

How Much Does an Office Fit Out Cost in Sussex?

Office fit out costs vary depending on specification, condition of the space, and scope of works. As a general guide for Sussex and the South Coast:

Cat A (shell to occupied)

£30 - £60 per Sq Ft

Cat B (basic to mid-spec)

£35 - £65 per Sq ft

Cat B (high spec, bespoke joinery, AV)

£65 - £100 per Sq ft

These are indicative ranges. The most reliable way to get a figure for your specific project is to use our fit out cost calculator, or to get in touch for a free site survey.

Key factors that affect cost:

  • Size of the space (sq ft)

  • Condition of the existing fit out (Cat A shell vs. previously occupied)

  • Number of enclosed rooms vs. open plan

  • Level of bespoke joinery and finishes

  • M&E requirements (data, AV, HVAC)

  • Programme — phased works or out-of-hours delivery add cost

How Long Does an Office Fit Out Take?

Timeline depends on the size and complexity of the project. As a guide:

Small Offices (upto 2,000 Sq ft)

6-10 weeks on site

Mid-size Offices (2,000-5,000 Sq ft)

10-14 weeks on site

Larger or multi-floor Offices

14-24 weeks on site

These timelines assume design and procurement are complete before works start. We advise clients to allow 6–8 weeks for design, approvals and procurement ahead of a start on site. If you have a lease start date or handover deadline, talk to us early and we will structure the programme around it.

Where We Work in Sussex & the South Coast

Faction Interiors delivers office fit outs across Sussex & the South Coast, including:

Brighton & Hove

Sussex's commercial hub; offices for creative, tech, professional services and co-working operators across the city centre and out-of-town business parks.

Crawley & Gatwick

Corporate headquarters, aviation and travel industry offices, and logistics hubs clustered around Manor Royal Business District and the airport corridor.

Portsmouth, Southsea & Havant

Naval, defence, maritime and professional services offices across the city centre

Southampton

Hampshire's largest commercial centre; corporate offices, professional services and waterfront workspace across the city and Ocean Village.

Worthing & Chichester

Professional services, aviation support and logistics sector workplaces serving one of West Sussex's fastest-growing commercial areas.

Basingstoke

Corporate and professional services offices in one of the South East's most active commercial property markets, with strong demand from financial and technology occupiers.

Fareham & Whiteley

One of the South Coast's strongest out-of-town business park markets, serving professional services and technology businesses between Portsmouth and Southampton.

We also work across the wider South Coast from Southampton to Folkestone, and into Central London.

  • “We are now settling in and I have to say we are delighted with the set up and fit out. It has had so much positive feedback and is a wonderful work space. Thank you so much for your hard work which has delivered such an excellent outcome to the deadline we set (not easy to do!).”

    Former Customer; Chris Corrigan, Chief Executive of The Sussex Wildlife Trust

Kitchen Fit Out Cost
Fit Out Costs Sussex

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