Foul drainage for new build

Foul drainage carries wastewater to the main sewer or treatment system. We install foul runs and connections to the design. Connection to the public sewer usually needs water company approval and building control compliance.

The commercial value of resolving foul drainage for new build early is fewer delays, clearer budgeting, and reduced repeat disruption.

review Groundworks Contractors in Slough and Excavation Contractors in Guildford.

When to consider this guidance

Teams usually investigate foul drainage for new build when early warning signs start affecting reliability, compliance, or project timelines. This is often the point where decision makers move from observation into scoped technical action.

Common warning signs

The symptoms below are the most common triggers we see before diagnosis and repair planning.

• New foul runs from building to connection
• Connection point from design
• Water company build-over or connection agreement
• Building control compliance
• Testing and adoption

How this is usually carried out

We work from your drainage design and water company approval. We excavate and lay foul drainage to the correct fall and size.

How we approach the fix

We deliver foul drainage to design with testing. We coordinate with the water company and building control.

What affects cost and complexity

Cost and complexity usually depend on access constraints, total scope, existing condition, and whether related works need to be coordinated in the same programme window.

What the process looks like

We keep delivery structured so scope, sequencing, and sign-off remain clear.

1. Step 1: Initial assessment

   What this step delivers: Root cause and scope are confirmed.

2. Step 2: Method planning

   What this step delivers: Practical repair strategy is agreed.

3. Step 3: Delivery and verification

   What this step delivers: Work is completed and validated.