Construction Site Accommodation: A Complete Guide for Project Managers

What Is Construction Site Accommodation?

Construction site accommodation refers to any housing or sleeping provision arranged for workers on a construction project. The term is used in two distinct ways, and it is worth being clear about both before comparing options.

The first meaning is literal: accommodation physically located on or adjacent to the construction site. This includes on-site cabins, modular accommodation blocks, and welfare units with sleeping quarters. This type is common on large, remote or long-duration infrastructure projects where no suitable housing stock exists locally.

The second meaning is broader: any accommodation arranged for workers because of a construction project. This includes serviced houses, apartments and HMO properties sourced in the local area, off-site but project-specific. For most UK construction projects within or near towns and cities, this is the primary solution.

Both types have a place. The right choice depends on project location, crew size, programme duration, welfare obligations and budget.

On-Site Accommodation: Welfare Units and Modular Blocks

On-site accommodation places workers in units physically installed at or near the project compound. Options range from basic welfare cabins with sleeping facilities to high-specification modular accommodation blocks with en-suite rooms.

When on-site accommodation works well: large remote infrastructure projects, offshore wind farms, reservoir works, remote rail construction, where the nearest town is an impractical distance from the site. Some highway and utilities schemes in rural areas also use on-site accommodation, particularly for overnight security or shift-based crews.

Welfare cabin and modular block costs: hiring a basic on-site accommodation unit costs from around £150–300 per week including delivery, ground works connection and basic facilities. High-specification modular blocks for 20+ workers can run into five figures per week once delivery, installation, connections, welfare, cleaning and management are factored in. These costs are often underestimated at tendering stage.

The limitations of on-site accommodation: quality of life is lower than off-site options. Workers are confined to the site compound in their downtime. Access to shops, restaurants and leisure facilities is limited. For projects within reasonable distance of housing stock, most workers actively prefer off-site accommodation. Retention is noticeably better when workers have proper living space away from the job.

Health and safety obligations: on-site accommodation is subject to the CDM Regulations 2015 and the Construction (Design and Management) Regulations, which set minimum requirements for welfare facilities. The Health and Safety Executive publishes specific guidance on what is required for sleeping accommodation on site. Non-compliance is a civil liability risk and a source of reportable incidents.

Off-Site Accommodation: Serviced Houses and Contractor Digs

Off-site construction site accommodation means workers sleep in residential properties in the local area and commute to the site each day. This is the standard approach for construction projects in or near urban areas, and it is the model used by the majority of Tier 1 and Tier 2 contractors in the UK.

Serviced contractor houses are the most practical format for teams. A typical Overnightly property accommodates four to ten workers in a fully furnished house with a proper kitchen, living room, laundry facilities and broadband. All bills are included. The company receives a single monthly invoice. Workers have real living space and the privacy of off-site accommodation.

Rates for contractor houses: off-site serviced accommodation starts from around £25 per person per night inclusive of all bills. For a team of six on a 12-week project, total accommodation costs are typically in the range of £12,600–18,000 all-in, materially cheaper than equivalent hotel accommodation, and significantly better quality of life than on-site welfare units.

Proximity to site: placement within practical commuting distance of the project is critical. For projects in UK cities and towns, Overnightly aims to place workers within 20–30 minutes of the site postcode. For larger projects, multiple properties may be needed in surrounding areas, we manage this as a single portfolio, consolidated onto one invoice.

Flexibility for phased programmes: most construction projects see crew size change over time. Off-site accommodation can be scaled up or reduced month by month in line with the programme. On-site modular blocks are harder to right-size quickly. A managed accommodation provider can add properties as the workforce ramps up and release them as phases complete.

Hotels vs Contractor Houses for Construction Crews

Hotels are the default choice for workers who have not been offered arranged accommodation by their employer. They are not a good choice for construction crews, and the comparison is straightforward.

Cost: a mid-range hotel near an active construction site in a UK city costs £80–120 per room per night. For a crew of six sharing three rooms, that is £240–360 per night, or roughly £7,200–10,800 over a 30-night deployment. A serviced contractor house for six, all-inclusive, runs £750–1,500 for the same period. The saving for a single deployment is typically £5,000–9,000.

Space: hotel rooms are sized for overnight business or leisure stays. They have no kitchen, minimal storage and no laundry. A construction worker returning from a 10-hour shift has nowhere to cook a proper meal, nowhere to dry work gear and nowhere to sit that is not the bed. This drives daily meal costs up by £20–40 per person and contributes directly to fatigue.

Booking terms: hotels are priced for flexible short stays with last-minute availability. For planned construction deployments, they cannot offer the fixed-price, long-term agreements that give contractors cost certainty. They also cannot accommodate company billing in most cases, workers book individually and claim back through expenses.

Contractor houses solve all of these problems. They are the correct accommodation format for any construction crew deployed for more than a few days.

How to Plan Construction Site Accommodation for a Project

Effective accommodation planning starts at pre-tender or early mobilisation, not the week before the crew arrives on site. Here is the practical process.

Step 1, Define your crew profile: how many people, for how long, in what phases? A civils project might start with five workers and peak at twenty-five before reducing to a snag team of six. Your accommodation solution needs to flex with these numbers, not lock you into fixed capacity.

Step 2, Identify the right location: the site postcode is the starting point. Accommodation within 20–30 minutes commute is ideal. For sites on the outskirts of towns, properties in the nearest residential area are preferable to city centre options that look closer on a map but are slower by road in the morning.

Step 3, Decide on-site vs off-site: for most UK projects near residential areas, off-site serviced housing is the right choice on cost, quality and flexibility. On-site accommodation should be considered only where no viable housing stock exists within commutable distance, or where shift patterns require workers to be on site overnight.

Step 4, Get proposals from accommodation providers: a managed accommodation company like Overnightly will provide a detailed proposal covering property options, all-in costs, terms and a mobilisation timeline. This gives you the documentation needed for procurement approval and allows you to compare options on a like-for-like basis.

Step 5, Confirm terms and mobilise: accommodation agreements for construction projects should cover the full anticipated programme with a review clause for extensions. Agreement in the company name, consolidated invoicing, and a named account manager for the duration are standard with a quality provider.

Construction Site Accommodation Compliance and Welfare

Construction employers have legal obligations around worker welfare that include accommodation quality where the employer is providing or arranging housing.

The CDM Regulations 2015 place duties on principal contractors to ensure adequate welfare facilities are provided. For on-site sleeping accommodation, the HSE's Construction Information Sheet No. 18 provides specific guidance on minimum space, heating, hygiene and sanitation requirements.

For off-site accommodation, Housing Act standards and landlord obligations apply. A managed accommodation provider should be able to demonstrate that all properties meet safety standards including gas safe certification, electrical inspection certificates (EICR), working fire alarms and carbon monoxide detectors.

IPRAC certification: the Independent Property Rental Accommodation Certification scheme is the quality standard for worker accommodation in the UK. IPRAC-certified providers have independently verified properties meeting defined safety and welfare standards. Overnightly is IPRAC certified. For procurement teams, working with an IPRAC-certified provider simplifies supplier approval and demonstrates welfare compliance to clients.

Worker wellbeing and retention: beyond legal compliance, the quality of accommodation directly affects worker welfare and retention. Studies on major UK infrastructure projects consistently show that better off-site accommodation reduces absence, improves morale and reduces recruitment churn. On a long-programme project, the cost of replacing a trained operative who has left because of poor digs is typically five to ten times the cost difference between adequate and good accommodation.

Construction Site Accommodation Costs: A Budget Guide

Budgeting for construction site accommodation early prevents costly surprises at mobilisation. Here are realistic benchmarks for 2026.

Off-site serviced contractor housing: £25–45 per person per night all-inclusive (bills, broadband, linen, weekly cleaning). Rates vary by UK region, London and the South East at the top end, Midlands and North at the lower end. Monthly rates represent best value and apply from 28-night stays.

On-site welfare units with sleeping facilities: hire costs from £150–300 per week per unit, not including installation, ground connections, servicing or management. For a 20-person on-site block, all-in costs typically run £2,000–5,000 per week depending on specification and duration.

Hotels for construction workers: £80–150 per room per night in UK towns and cities. No kitchen, no laundry, no storage. Typically 2–3x the cost of managed contractor housing for equivalent headcount.

Cost of poor accommodation planning: last-minute bookings add 20–40% to accommodation costs. Failure to agree terms early leads to mid-project rate increases as local demand rises. On large projects, unmanaged hotel spend regularly runs 3–4x what a managed accommodation contract would have cost.

The most effective thing a project team can do to reduce accommodation costs is engage a managed provider at pre-tender stage and lock in rates before the project starts.

Frequently Asked Questions About Construction Site Accommodation