Commercial Drain Survey Birmingham

Commercial drain surveys for Birmingham businesses, landlords, and developers cover larger-bore pipework, grease traps, FOG compliance, and the more complex drainage layouts found in commercial premises. Surveys start from £300 for a single-unit site. We work across Birmingham’s commercial areas — Digbeth, the Jewellery Quarter, Brindleyplace, and Eastside — as well as retail parks, industrial estates, and multi-unit residential blocks across the wider city.

Updated: April 2026

What Is a Commercial Drain Survey?

A commercial drain survey is a CCTV inspection of the underground drainage system at a business premises, commercial building, or multi-unit development. It uses the same camera technology as a residential survey but is adapted for the larger pipe diameters, greater depths, longer runs, and more complex layouts typical of commercial drainage.

Commercial drainage in Birmingham commonly includes:

• 150mm, 225mm, and 300mm diameter pipes — larger than the 100mm standard in domestic properties, requiring different camera equipment.
• Multiple discharge points — kitchens, toilets, yards, car parks, and workshop floors all contributing to a single drainage system.
• Grease traps and interceptors — installed to capture FOG before it reaches the public sewer.
• Trade effluent infrastructure — where the business produces process waste, chemical waste, or food-industry effluent regulated by Severn Trent Water.
• Shared drainage — particularly in multi-tenanted commercial buildings, where one tenant’s drain connects to another’s before joining the public sewer.

The survey produces a full written report with WRc condition grading, HD footage, defect codes, and repair recommendations — the same format as a residential report, but covering the additional commercial-specific findings. See our drain survey reports page for a full breakdown of the report format.

Birmingham’s Commercial Drainage Landscape

Birmingham’s commercial property market is concentrated in several distinct areas, each with its own drainage characteristics.

Digbeth

Digbeth is Birmingham’s oldest industrial quarter, with a dense concentration of former factory buildings, warehouses, and workshops now being converted to creative workspace, residential apartments, and hospitality use. The drainage infrastructure here is Victorian combined sewer — foul and surface water sharing a single pipe, often at considerable depth below street level.

These combined sewers have been in continuous use since the 1850s and 1870s in some streets. Clay pipes at this age show regular joint displacement, root ingress from trees in the few remaining open yards, and intermittent collapses where the crown of the pipe has failed under road loading. The conversion of commercial buildings to residential use in Digbeth’s creative quarter generates significantly more wastewater than the original industrial use the drainage was designed for — increasing the hydraulic load and accelerating the deterioration of already-aging infrastructure.

As of 2026, Digbeth is one of the most active commercial conversion zones in Birmingham, with dozens of planning applications involving drainage alterations. A pre-works drainage survey is essential before any conversion project starts.

Jewellery Quarter

The Jewellery Quarter combines active jewellery manufacturing workshops with a growing residential and hospitality sector. Manufacturing premises may discharge process water — acids, cleaning chemicals, and metalworking fluids — subject to trade effluent consent from Severn Trent Water. Residential conversions in the same streets generate domestic wastewater. The drainage systems in many Jewellery Quarter buildings serve both simultaneously.

The canal-side location of parts of the Jewellery Quarter adds groundwater infiltration risk. CCTV surveys in this area regularly find infiltration through open joints in canal-adjacent drain runs, particularly after periods of heavy rainfall.

Brindleyplace and Gas Street Basin

Brindleyplace is Birmingham’s premium commercial and leisure district, housing offices, hotels, and restaurants around the canal basin. The food and beverage concentration in this area means FOG management is an active issue for most premises. Grease traps must be maintained regularly and drainage surveyed to demonstrate compliance with trade effluent obligations.

The proximity of the canal network creates specific drainage complexity. Surface water drainage from commercial premises in this area must be carefully managed to prevent discharge to the canal — which would constitute an environmental offence under the Water Resources Act 1991. CCTV survey and mapping establishes exactly where surface water from each premises discharges, eliminating uncertainty about compliance.

Eastside and Curzon Street

The area around Eastside — including the site of the new HS2 Curzon Street station — is undergoing significant commercial development. As of 2026, enabling and construction works for HS2 Phase One are actively changing the underground infrastructure landscape in this area. Commercial developers and property owners near the HS2 works should commission baseline drainage surveys before any new groundworks to establish pre-works condition records. See our drain mapping and tracing page for more on HS2-adjacent drainage issues.

Grease Trap Inspection and FOG Compliance

Food businesses — restaurants, cafes, takeaways, food production facilities, and hotel kitchens — produce significant quantities of fats, oils, and grease (FOG) as part of normal operations. FOG that enters the drainage system cools and solidifies, forming blockages in private drain lines and, more significantly, contributing to fatbergs in Severn Trent Water’s public sewers.

Severn Trent Water has enforcement powers under the Water Industry Act 1991 to recover the cost of clearing FOG-related blockages in the public sewer from the food business responsible for the discharge. Enforcement notices and, in serious cases, prosecution are realistic consequences of poor FOG management.

A grease trap inspection as part of a commercial drain survey:

• Checks the grease trap’s physical condition — cracking, leaking, or damaged baffles that reduce its effectiveness.
• Assesses the volume and composition of accumulated FOG to establish whether the trap is being pumped out frequently enough.
• CCTV-inspects the drain run downstream of the trap to check for FOG accumulation in the pipe bore.
• Provides a written record of grease trap condition suitable for submission to Severn Trent Water as evidence of active FOG management.

As of 2026, Severn Trent Water’s FOG compliance team actively monitors food premises in Birmingham’s commercial areas. Businesses that cannot demonstrate a regular programme of grease trap maintenance and drain inspection are at higher risk of enforcement action.

Commercial Landlord Obligations

Commercial landlords in Birmingham have obligations relating to drainage under lease agreements, statutory health and safety requirements, and Severn Trent Water’s regulations.

Under a typical commercial lease, the landlord is responsible for maintaining the structural integrity of the drainage serving the premises. The tenant is responsible for avoiding misuse — disposing of inappropriate materials, maintaining any grease traps the tenant operates, and reporting drainage problems promptly.

A drain survey at lease inception establishes the drainage condition baseline. Any defects found are the landlord’s responsibility to repair before the tenant takes occupation. Any new defects found at lease expiry — beyond reasonable wear and tear — may be recoverable from the tenant under the dilapidations process.

For multi-tenanted buildings, shared drainage arrangements require particular clarity. A commercial drain survey maps the shared sections and identifies which runs are landlord-managed infrastructure and which are tenant-specific connections. This prevents disputes about responsibility when problems arise.

Commercial Surveys for Property Developers

Birmingham’s development pipeline is active across several sectors — commercial-to-residential conversion, industrial estate redevelopment, mixed-use schemes, and new-build residential. Drainage surveys are a standard requirement at several stages of the development process.

Pre-acquisition surveys. Before exchanging contracts on a commercial site, understanding the drainage condition and any legacy contamination or structural issues avoids purchasing a site with hidden infrastructure costs.

Pre-planning surveys. Planning applications for change of use or new development must address drainage adequacy. A drain survey provides the evidence base that existing drainage can support the proposed use or identifies what upgrading is needed.

Pre-construction surveys. Before groundworks start, a drainage survey and mapping exercise establishes where all drainage runs lie, prevents accidental damage during excavation, and creates a baseline record that supports any future Severn Trent or HS2-related claim.

Pre-let surveys. Establishing drainage condition before tenants move in protects the landlord’s position on dilapidations and ensures the incoming tenant has a fully functioning drainage system from day one.

What a Commercial Drain Survey Report Includes

Commercial drain survey reports follow the same WRc framework as residential reports but include additional commercial-specific elements:

• A full run schedule covering every pipe diameter, material, and length inspected.
• WRc condition grades and MSCC defect codes for all structural findings.
• Grease trap condition assessment and FOG compliance notes where applicable.
• Trade effluent infrastructure identification and condition notes.
• Boundary mapping showing Severn Trent Water’s public sewer network relative to the site.
• Recommendations prioritised for facilities management and budget planning.
• An executive summary suitable for submission to Severn Trent Water, commercial solicitors, or planning authorities.

Reports are issued within 48 hours of survey as a PDF. CAD-format drainage plans are available for development projects. See our drain survey reports page for full details.

Booking a Commercial Drain Survey in Birmingham

We serve commercial premises of all sizes across Birmingham and the wider West Midlands. Call 0121 XXX XXXX to discuss your requirements. When you call, let us know the type of premises, its approximate size, whether it is currently occupied, and any specific concerns — grease trap compliance, pre-let condition, or development planning. We will provide a written quote before attending.

For large development sites, phased surveys, or multi-site programmes, we offer volume pricing and can coordinate access with site managers and estate agents.

Frequently Asked Questions

How much does a commercial drain survey cost in Birmingham? Commercial drain surveys in Birmingham typically start at £300 for a simple single-unit premises and range to £600 or more for larger sites with multiple drain runs, larger-bore pipes, or complex access requirements. Factors that affect cost include the number of drain runs, pipe diameter (commercial sites often use 150mm, 225mm, or 300mm pipes), the number of access chambers, and whether grease trap inspection is included. We provide written quotes before attending.

What Severn Trent Water regulations apply to Birmingham commercial premises? Severn Trent Water’s trade effluent consent regime applies to any commercial premises discharging trade effluent — including food businesses, manufacturers, and vehicle washes — to the public sewer. Premises with a trade effluent consent must manage their drainage to prevent grease, oils, chemicals, or sediment from entering the sewer in excess of permitted levels. Grease trap maintenance and regular FOG compliance checks are part of this obligation. A drain survey provides evidence of compliance and identifies any issues before Severn Trent enforcement action.

Do commercial landlords in Birmingham need to survey drains before letting? There is no statutory requirement to survey drains before a commercial let, but it is strongly recommended. A pre-let survey establishes the drainage condition at the start of the tenancy, protecting the landlord from claims that defects were pre-existing or were caused by the tenant. It also gives the incoming tenant certainty about what they are taking on. For food and beverage tenants specifically — common in Digbeth and Brindleyplace — establishing a clean baseline for grease trap and FOG management is valuable at day one.

Can you survey drainage in a listed building or heritage site in Birmingham? Yes. Birmingham has a significant stock of listed commercial buildings, particularly in the Jewellery Quarter and around the canal conservation areas. CCTV drain surveys are non-invasive — the camera is inserted through existing access points with no groundworks — making them well-suited to listed and heritage buildings where physical intervention is constrained. We carry out surveys in active listed buildings and canal-side commercial premises regularly.

How often should a commercial property in Birmingham have its drains surveyed? For food businesses, we recommend a drainage survey at least every two years, with grease trap inspection every six to twelve months depending on throughput. For general commercial premises, a survey every five years is reasonable unless problems arise. For properties undergoing renovation, change of use, or new tenancy, a survey before works begin and before tenant occupation provides clear baseline records. Properties near HS2 construction works should survey annually given the ground movement risk.

What is FOG compliance and why does it matter for Birmingham food businesses? FOG stands for fats, oils, and grease. Cooking fats from restaurant and food manufacturing premises accumulate in drainage pipes and, when they cool, solidify into dense blockages — commonly called ‘fatbergs’. Severn Trent Water has enforcement powers under the Water Industry Act 1991 to recover the cost of clearing FOG blockages in public sewers from the business responsible. A CCTV survey combined with grease trap inspection demonstrates that a Birmingham food business is managing its FOG obligations actively — a crucial defence if Severn Trent raises an enforcement notice.