Unlike traditional construction, the ISO Frame System is manufactured entirely in our controlled factory environment. As a result, each unit arrives on site with 90% of the build already complete — including insulation, electrics, flooring and internal finishes. Installation consequently takes just 1–3 days, even for multi-module configurations.

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  Steel Frame Construction

  High-strength closed steel profiles with anti-corrosive coating. Compliant with ISO 1090 and ISO 3834 welding standards.

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  Stackable to 3 Storeys

  Bolted modular construction allows vertical stacking without additional structural works, significantly reducing cost per m² for multi-storey projects.

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  Three Performance Tiers

  Standard, REI60 fire-rated and Part L 2021 A-rated versions available. All tiers share the same steel frame platform, so upgrades are straightforward.

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  Fully Relocatable

  Because ISO Frame units are bolted rather than welded on site, they can be dismantled, relocated and reinstalled at a new location — protecting your capital investment long-term.

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  Buy or Hire Available

  ISO Frame units are available to purchase outright or hire on a weekly basis, with hire-to-buy options also available for longer-term requirements.

70% Faster Than Traditional Build

Because 90% of the build is completed in our factory, on-site installation takes just 1–3 days. As a result, your building is operational weeks sooner than a traditional construction programme.

REI60 Fire Rating Available

Our REI60 tier provides 60-minute structural fire resistance, which means it meets the requirements for education, healthcare and public sector applications where enhanced fire safety is mandatory.

Part L 2021 A-Rated Energy

Our A-rated tier is fully compliant with Part L 2021 Building Regulations. Furthermore, mineral wool insulation up to 240mm and triple-glazed windows deliver outstanding thermal performance and low running costs.

7 ISO Certifications

Every ISO Frame unit is manufactured under ISO 9001, 1090, 3834, 14001, 27001, 22301 and 8501 certified systems, ensuring full traceability, structural integrity and suitability for government and public sector procurement.

Purchasing your ISO Frame unit outright gives you full ownership of a relocatable, long-life asset. Because units are bolted rather than welded on site, you can move them to a new location at any point, protecting your capital investment. Standard payment terms are 40% deposit, 55% prior to delivery and 5% within 14 days of installation.

• ✓  Full ownership — relocatable asset
• ✓  Asset finance available (3–7 years)
• ✓  10–15 year structural warranty
• ✓  Framework & call-off contracts available

Our weekly hire option gives you immediate access to ISO Frame units without the upfront capital commitment. As a result, it is ideal for short-term site requirements, seasonal demand and projects where flexibility is essential. Furthermore, hire-to-buy options are available if your requirements become permanent.

• ✓  Weekly rates from £70/pw
• ✓  No long-term commitment required
• ✓  Hire-to-buy option available
• ✓  Delivery & collection included in quote

Every ISO Frame unit is built to order, which means we can adapt any model to your exact requirements. Whether you need custom dimensions, upgraded insulation, additional windows, DDA-compliant access or a specific internal layout, our design team will produce a detailed specification and fixed price before any commitment is required.

• ✓  Custom dimensions available
• ✓  DDA-compliant access options
• ✓  Bespoke internal layouts
• ✓  Fixed price before commitment

Tier-by-Tier Specification Comparison

Standard · REI60 Fire-Rated · Part L 2021 A-Rated

Every ISO Frame unit is manufactured under a comprehensive suite of certified management systems, ensuring full traceability, structural integrity, and suitability for government, commercial, and industrial procurement.

• ✓ ISO 9001 – Quality Management
• ✓ ISO 1090 – Structural Steel CE Certification
• ✓ ISO 3834 – Welding Quality Assurance
• ✓ ISO 14001 – Environmental Responsibility
• ✓ ISO 27001 – Information Security
• ✓ ISO 22301 – Business Continuity
• ✓ ISO 8501 – Surface Preparation (Sa 2.5 blast-cleaned)
• ✓ CE marked – EN 1090-1 structural compliance
• ✓ Constructionline Bronze – SSIP & Acclaim accredited

Standard RAL colours are available across both frame and wall panels, with UV-resistant coatings for long-term durability. Custom colours are available to match your corporate identity or planning requirements.

All ISO Frame units arrive with a complete, plug-and-play UK electrical installation. Simply connect to your site supply and the unit is operational — no additional fit-out required for standard use.

• ✓ Full 230V UK electrical system throughout
• ✓ IP65 LED light fittings — 2×18W per unit, sealed for longevity
• ✓ Metal consumer unit with RCD protection
• ✓ UK-standard sockets and switches throughout
• ✓ Convector heaters (Standard & REI60) or air-to-air heat pump SCOP 4.5 (Part L)
• ✓ Safe for industrial, commercial, and public-sector use

Key Structural Advantages — All ISO Frame Tiers

Regardless of which tier you choose, every ISO Frame unit shares the same engineered steel platform and factory-quality build process.

1.6 kN/m²

Snow Load Capacity

2,000 kg/m²

Standard Floor Load

3 Storeys

Max Stacking Height

REI 60

Max Fire Rating Available

SCOP 4.5

Heat Pump Efficiency

Sa 2.5

Blast-Clean Standard

Additional Services — Delivery, Installation & Site Works

Based on 50ft × 28ft ISO Frame project · Site-specific quotes available

Payment Terms

Flexible Finance & Hire-to-Buy

Not ready to buy outright? We offer several flexible procurement routes to suit your budget and project timeline.

• ✓ Hire-to-buy — weekly hire payments contribute toward outright purchase
• ✓ Asset finance — 3–7 year lease terms via our finance partners
• ✓ Framework & call-off — repeat or phased orders for public sector and education clients
• ✓ Milestone payments — phased payment schedules available for larger projects
• ✓ No minimum order — single units, prototypes, and phased programmes all welcome

Lead Times & Delivery

Factory-built off-site means your unit is ready far faster than traditional construction — with no weather delays and no wet trades on site.

• ✓ Standard units: 4–6 weeks from confirmed order
• ✓ Bespoke & large format: 8–12 weeks depending on specification
• ✓ UK-wide delivery — England, Wales & Scotland mainland as standard
• ✓ Islands & N. Ireland — available by quotation
• ✓ 70% faster than traditional construction on equivalent footprint

Commercial Offices

Open-plan or partitioned office space delivered in weeks, not months. Stackable to three storeys for multi-floor headquarters, satellite offices, or temporary project accommodation. Full electrical, heating, and IT infrastructure installed at factory.

• ✓ Single or multi-storey configurations
• ✓ Part L A-rated energy option
• ✓ Buy or hire from £66/week

Education & Classrooms

Rapid-deployment classrooms and teaching spaces that meet Building Regulations Part L, fire safety, and DDA accessibility requirements. Ideal for school expansions, temporary teaching blocks during refurbishment, or permanent additions to academy campuses.

• ✓ REI60 fire-rated option for grouped buildings
• ✓ Minimal disruption to live school sites
• ✓ Framework & call-off procurement available

Healthcare & NHS

Hygienic, soundproofed clinical spaces for GP surgeries, dental practices, vaccination centres, and NHS overflow facilities. Factory-finished interiors with wipe-clean surfaces, FIBO wall panels, and GEBERIT sanitary systems ensure infection-control compliance from day one.

• ✓ FD30/FD60 fire doors available
• ✓ Anti-mould, wipe-clean interior finishes
• ✓ From £14,950 for a complete clinic cabin

Construction & Welfare

Site offices, welfare units, drying rooms, and canteen facilities for contractors and civil engineering projects. Hire or buy with flexible terms. Fully compliant with CDM welfare requirements, with sanitary units featuring GEBERIT plumbing and 120L water heaters.

• ✓ Hire from £50/week (10ft units)
• ✓ Shower, WC & canteen combinations
• ✓ Relocatable between project sites

Sports & Leisure

Changing rooms, pavilions, clubhouses, ticket offices, and spectator facilities for sports clubs, leisure centres, and outdoor venues. Modular construction means minimal pitch-side disruption and the ability to expand as your club grows.

• ✓ Custom layouts for changing & shower areas
• ✓ DDA-accessible entrances & facilities
• ✓ Durable, low-maintenance finishes

Accommodation & Security

Staff accommodation, security cabins, gatehouse units, and temporary housing for remote sites, events, or emergency deployment. Stackable to three storeys for high-density configurations. REI60 fire-rated tier available for multi-occupancy buildings.

• ✓ Stackable to 3 storeys for high-density use
• ✓ REI60 fire-rated for multi-occupancy compliance
• ✓ Rapid deployment for emergency or event use

Public Sector & Councils

Local authorities, housing associations, and public bodies benefit from framework and call-off procurement, phased delivery, and full compliance documentation. Our Constructionline Bronze and SSIP accreditations satisfy most public sector supply chain requirements.

• ✓ Constructionline Bronze & SSIP accredited
• ✓ Framework & call-off contracts supported
• ✓ Full compliance pack: RAMS, O&M, warranties

Retail, Showrooms & Pop-Up

Branded retail units, showrooms, ghost kitchens, and pop-up venues that look permanent but can be relocated when your business moves. Custom RAL colour cladding, large glazed frontages, and full electrical fit-out available as standard.

• ✓ Custom RAL colour & cladding options
• ✓ Large glazed frontages available
• ✓ Fully relocatable — move with your business

Storage & Industrial

Secure, weatherproof storage units, workshops, server rooms, and equipment shelters. Anti-corrosion steel frame, IP65 electrical fittings, and robust insulated panel construction make ISO Frame units ideal for demanding industrial environments.

• ✓ Anti-corrosion steel, IP65 electrical
• ✓ Stackable for high-density storage
• ✓ Suitable for server rooms & secure equipment

Not Sure Which Configuration Is Right for You?

Our team works with clients across every sector listed above. Tell us your project size, site location, and intended use — we’ll recommend the right ISO Frame tier, layout, and procurement route within 24 hours.

Mon–Fri 8am–6pm · Free site survey available

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  ISO 9001:2015

  Quality management system — every unit manufactured under a certified QMS with full traceability.

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  ISO 1090 & ISO 3834

  Steel fabrication and welding certification. Required for structural steel in UK and European construction.

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  PN-EN ISO 8501

  Surface preparation and anti-corrosion coating standard. Ensures long-term structural integrity.

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  10–15 Year Structural Warranty

  Steel and timber frame structural warranty. Extended warranties available for public sector clients.

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  REI 60 Fire Rating

  Load-bearing, integrity, and insulation maintained for 60 minutes. Required for schools, healthcare, and multi-occupancy buildings.

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  FD30 & FD60 Fire Doors

  Certified fire doors fitted as standard on REI60 units. FD60 available for high-risk or multi-storey configurations.

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  Building Regulations Part B

  Fire safety compliance for means of escape, internal fire spread, and external fire spread.

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  Emergency Lighting

  Factory-installed emergency lighting on REI60 and Part L units. Tested and certified prior to delivery.

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  Building Regulations Part L 2021

  A-rated energy envelope on Part L tier. KINGSPAN QuadCore panels achieve U-values of 0.11–0.18 W/m²K.

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  ISO 14001:2015

  Environmental management system. Responsible sourcing, waste reduction, and sustainable manufacturing processes throughout production.

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  SCOP 4.5 Heat Pump

  Air-to-air heat pump on Part L units delivers highly efficient heating and cooling — significantly reducing operational energy costs.

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  Triple-Glazed Windows

  U-value 0.7 W/m²K on Part L tier. Aluminium or PVC frames with DDA-compliant opening options available.

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  SSIP Accreditation

  Safety Schemes in Procurement — independently verified health & safety management. Accepted by most UK principal contractors.

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  Constructionline Bronze

  Pre-qualification verified by Constructionline. Simplifies procurement for public sector and framework clients.

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  CDM 2015 Compliance

  Full Construction Design and Management compliance. Site-specific RAMS, lifting plans, and method statements provided for every project.

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  ISO 27001 & 22301

  Information security and business continuity management — relevant for public sector, NHS, and data-sensitive clients.

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  Building Regulations Part M

  Access and use compliance. Wider doorways, level thresholds, and DDA-compliant sanitary facilities available across all unit types.

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  DDA-Compliant Windows & Doors

  Low-threshold aluminium entrance doors and accessible window opening hardware. Suitable for schools, healthcare, and public buildings.

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  Accessible Sanitary Units

  Wheelchair-accessible WC and shower configurations available on MS Series welfare units. GEBERIT fittings with 25-year warranty.

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  Ramped Access Options

  External ramps and steps supplied and installed to suit ground level and site conditions. Quoted per project.

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  PN-HD 60364 Electrical

  UK 230V electrical installation standard. Full RCD consumer unit, IP65 LED lighting, and certified wiring on every unit.

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  GEBERIT Plumbing Systems

  25-year manufacturer warranty on all GEBERIT sanitary systems. Factory-installed and pressure-tested before delivery.

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  MVHR Ventilation

  Mechanical ventilation with heat recovery on Part L units. Complies with Building Regulations Part F for air quality and ventilation.

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  Fire Alarm Integration

  Fire alarm and detection systems factory-wired and ready for site connection. Emergency lighting included on REI60 and Part L tiers.

Request a Full Compliance Pack

Every project includes a complete compliance documentation pack: ISO certificates, structural calculations, RAMS, O&M manual, electrical certification, and warranty schedule. Available on request prior to order.

What sizes are available for ISO Frame modular buildings?

ISO Frame units are available in four standard sizes: 10ft × 8ft (anti-vandal cabin), 20ft × 8ft (standard office/welfare), 32ft × 10ft (large open-plan), and 50ft × 28ft (multi-room complex). Custom sizes are available on request for bespoke projects.

Can ISO Frame units be stacked to create multi-storey buildings?

Yes. ISO Frame units are engineered to stack up to three storeys high. Each unit undergoes load compression testing to verify structural integrity for stacking. Multi-storey configurations require site-specific structural calculations, HIAB crane installation, and engineered lifting plans — all of which we provide as part of the project package.

Do ISO Frame modular buildings require planning permission?

It depends on the intended use, duration, and site. Temporary structures used for fewer than 28 days may fall under permitted development. Permanent or semi-permanent installations typically require planning permission. We recommend consulting your local planning authority. We can provide technical drawings and specifications to support your application. See GOV.UK Building Regulations guidance for further detail.

What is the difference between the Standard, REI60, and Part L tiers?

The Standard tier uses mineral wool insulation and is suited to storage, site offices, and short-term use. The REI60 tier adds 60-minute fire resistance, certified fire doors, and emergency lighting — required for schools, healthcare, and multi-occupancy buildings. The Part L tier is our highest-specification unit: KINGSPAN QuadCore insulation, triple-glazed windows, SCOP 4.5 heat pump, and A-rated energy performance compliant with Building Regulations Part L 2021.

How long does it take to manufacture and deliver an ISO Frame unit?

Standard units are ready in 4–6 weeks from confirmed order. Bespoke or large-format configurations take 8–12 weeks. We deliver UK-wide to England, Wales, and mainland Scotland as standard. Northern Ireland and island deliveries are available by quotation.

Can I hire an ISO Frame unit rather than buying outright?

Yes. We offer weekly hire from £50/week for 10ft anti-vandal cabins up to £200+/week for large 50ft × 28ft complexes. Hire-to-buy is also available, where weekly hire payments contribute toward the outright purchase price. Asset finance over 3–7 years is available via our finance partners.

What foundations are required for an ISO Frame modular building?

Foundation requirements depend on ground conditions, unit size, and whether the building will be stacked. Options include screw pile foundations, concrete pad foundations, and adjustable steel plate systems. We carry out a pre-installation site survey to assess ground conditions and recommend the most appropriate solution. Foundation costs are quoted separately per project.

Are ISO Frame buildings fully relocatable?

Yes. Units can be disconnected from services, lifted by HIAB crane, transported, and reinstalled on a new site. This makes them ideal for businesses that may need to move, expand, or repurpose space in the future — with no loss of asset value.

What warranties are included with an ISO Frame modular building?

ISO Frame units include a 10–15 year structural warranty on the steel frame, 5–10 years on insulated panels and roof, 5 years on windows and doors, and 12–24 months on internal workmanship and installation. GEBERIT plumbing systems carry a 25-year manufacturer warranty. Extended warranties are available for public sector and framework clients.

Do you supply ISO Frame buildings across the whole of the UK?

Yes. We deliver and install across England, Wales, and mainland Scotland as standard. Deliveries to Northern Ireland, Scottish islands, and other UK islands are available by quotation. For large or bespoke projects, we can also deliver to selective mainland European locations. Contact us for a delivery quote to your specific site.

Your ISO Frame Modular Building Starts Here

Whether you need a single portable cabin or a multi-storey modular complex, our team will guide you from first enquiry to completed installation. Fixed pricing, certified quality, and UK-wide delivery as standard.

Get a Free Quote

Tell us about your project and we’ll send a fixed-price quotation within 24 hours.