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Check out answers to our most frequently asked questions below.

What does SJP Interiors do?

SJP Interiors is a commercial interiors company based in Milton Keynes, providing office design and build, office refurbishment, and commercial fit-out services for businesses and property owners. The team also delivers warehouse and industrial fit-outs, school and healthcare refurbishments, and specialist work such as glass partitioning, acoustic solutions, mezzanines, washrooms, kitchens, flooring and bespoke joinery.

SJP Interiors is based in Milton Keynes and delivers projects across the surrounding region, including Bedford, Buckinghamshire, Cambridge, Luton, Northampton, Oxford, Watford, Leicester, Coventry, Birmingham, and Peterborough. The team also works with national and regional businesses, having delivered projects for major contractors such as Morgan Sindall, Wates, and Galliford Try.
SJP Interiors’ team brings over 60 years of combined experience in commercial fit-out and refurbishment. The company is award-winning and has delivered projects for clients including DHL, Jaguar Land Rover, X&Why, Goodrich Consulting and Datron.
An office fit-out prepares a new or empty commercial space for use — installing partitions, flooring, lighting, joinery, and mechanical and electrical services — while a refurbishment updates or modernises an existing office that’s already fitted out. SJP Interiors offers both, along with full design-and-build for projects starting from an empty shell.
A Cat A fit-out delivers the base building elements — raised floors, suspended ceilings, basic M&E, and finished internal surfaces — ready for a tenant to move in. A Cat B fit-out goes further, adding the client’s own layout, meeting rooms, branding, furniture, and finishes on top of a Cat A shell. SJP Interiors delivers both Cat A and Cat B fit-outs for new and existing premises.
SJP Interiors manages projects end-to-end, offering a full turnkey service, from initial design and space planning through to construction and handover. In-house capability covers walls and ceilings, mechanical and electrical, acoustic solutions, air conditioning, HVAC, glass partitions and internal glazing, flooring and lighting, washrooms, and bespoke carpentry and joinery — so clients don’t need to coordinate multiple separate contractors.
Yes. SJP Interiors delivers warehouse and industrial fit-outs and refurbishments, including racking and mezzanine installations, alongside its office and commercial work.
Yes. SJP Interiors has completed school and education fit-outs and refurbishments (including a four-storey college project) and healthcare/hospital refurbishments, in addition to its core commercial office work.
SJP Interiors offers glass partitioning and glazing, acoustic solutions, commercial furniture, and mezzanine installations as specialist services, alongside its core design, build, and refurbishment work.
Timelines vary by project size and scope — a straightforward refurbishment of a single floor can move faster than a full design-and-build from an empty shell. A project can range from weeks to months depending on the size, specification and complexity. Early engagement, design development, procurement and approvals all help to reduce delays.
Cost depends on the scope of work, the size of the space, and the level of specification required, so SJP Interiors provides tailored quotes after an initial discussion. Work can be carried out from £25 per sq ft all the way up to over £200 per sq ft depending on specification and scope.
SJP Interiors follows a four-stage process: Discovery (understanding your requirements and brief), Design (creating a project that reflects your business needs), Plan (scheduling delivery to minimise disruption), and Build (delivering the completed space). Projects start with an initial conversation — clients can call, email, or use the contact form to discuss their requirements.
Yes, experienced contractors can plan and sequence works to achieve minimal disruption for occupied businesses. Phasing the project, segregating work areas, scheduling noisy or disruptive activities outside working hours, and maintaining safe access routes are coordinated closely with the client’s team. Strategic planning and scheduling allow businesses to continue operating during a refurbishment.
Not necessarily, unless the external envelope of the building is being changed. Many internal fit-out works do not need planning permission, but this depends on the proposed alterations, property, location and intended use. Building Regulations, landlord approvals, fire safety requirements and other statutory obligations may still be applicable. SJP Interiors will identify potential approvals and constraints during the early stages of the process.
Yes, depending on the project procurement route, SJP Interiors can coordinate with building control, architects, engineers and other consultants to ensure the works comply with applicable Building Regulations.
Look for a contractor with the relevant experience and insurances. Quotes should give a clear breakdown of scope and cost, along with identifying the approach to programme and procurement. Contractors advanced with technology, utilising estimating and delivery software, are proven to achieve better results with quality, budgets and reducing health and safety risks on projects. It is useful to review client references and the contractor’s approach to health and safety through their accreditations with Constructionline and CHAS.
Ask about their experience with similar projects, proposed programme, project management structure, subcontractors, health and safety arrangements, insurance, warranties, payment terms, variation procedures and approach to unexpected site conditions. You should also establish exactly what is included and excluded from the quotation.
Yes. SJP Interiors can provide design-and-build services or work alongside the client’s architect and consultants. Being involved early can provide practical input on buildability, material selection, costs, programme and construction sequencing before work begins on site.
Cost can often be controlled by establishing a clear brief, setting the budget early, prioritising essential works, retaining suitable existing elements, selecting cost-effective materials and resolving design decisions before construction starts. Early contractor involvement can also identify buildability issues and potential savings before they become costly changes on site.
Sustainable refurbishment can include reusing existing materials and building elements, specifying recycled or low-impact materials, improving insulation, upgrading lighting to efficient systems, reducing waste, improving HVAC efficiency and incorporating energy-monitoring systems. The most appropriate measures depend on the existing building and project objectives. Refurbished or recycled office furniture is also a great way of reducing carbon footprints.
Ideally, during the design and budgeting stages. A contractor should be involved as early as possible, as this allows them to assess buildability, programme, procurement lead times, site constraints and likely costs before the design and budgets are finalised.
SJP Interiors’ team holds relevant industry certifications and has received recognition from industry bodies for its design, construction, and delivery work, including awards linked to major contractors such as Morgan Sindall, Wates and Galliford Try. SJP Interiors holds accreditations with ConstructionLine Gold, CHAS, Considerate Constructor, and is a member of the Federation of Interior Specialists.

You can contact SJP Interiors by phone on 01908 316199, by email at Mark@SJPContracts.co.uk, or via the contact form on sjpinteriors.com to discuss your project and receive a tailored quote.