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🏘️Building Extensions

Extension Project Management

One point of contact coordinating every trade, stage and inspection

An extension involves far more coordination than most households expect — multiple trades working in the right sequence, building control inspections at specific stages, and often a party wall process running alongside the build — and having one point of contact managing all of it is what keeps a project from becoming genuinely stressful.

The trades on an extension have to happen in a fairly strict order — groundworkers before bricklayers, structural steel before the roof goes on, first-fix electrics and plumbing before plasterers, plasterers before decorators — and getting that sequencing wrong, or having trades arrive out of order, is one of the most common causes of delay and frustration on a self-managed build. Building control inspections are required at specific stages of the work — foundations before they're covered, structural steelwork before it's boxed in, drainage before it's backfilled — and missing an inspection at the right point can mean digging work back up or exposing covered structure to allow it to be checked, which is exactly the kind of costly rework proper sequencing avoids. Where an extension is built on or near a shared boundary with a neighbouring property, party wall matters need managing early — formal notice served in good time, and the process handled correctly, since a party wall issue raised late in a project can genuinely hold up construction at a point where delay is most disruptive. Full project management means one point of contact is responsible for all of this — sequencing trades correctly, booking and passing building control inspections at the right stages, and handling the party wall process where it applies — so that as the client, you have a single person to speak to throughout, rather than coordinating scaffolders, groundworkers, electricians, plasterers and building control inspections yourself alongside everything else going on in your life during a building project.

When Extension Project Management Is the Right Choice

  • Households wanting a single point of contact throughout the entire build
  • Extensions on or near a shared boundary needing the party wall process managed
  • Projects with multiple trades needing careful sequencing to avoid delay
  • Anyone who doesn't want to personally coordinate building control inspections and trade scheduling
  • Larger or more complex extensions where project management genuinely reduces risk

What's Involved

1

Planning & Sequencing

Trades are scheduled in the correct order from groundwork through to decoration.

2

Building Control Liaison

Inspections are booked and passed at the required stages — foundations, structural steel, drainage and completion.

3

Party Wall Process

Where relevant, formal notice is served and the party wall process managed alongside the build programme.

4

Single Point of Contact

One person coordinates trades, inspections and communication with you throughout the project.

Local to South Mimms, North London & Hertfordshire

New Barnet, the residential district of the London Borough of Barnet south-east of High Barnet town centre, and Enfield Town, the historic centre of the London Borough of Enfield on the A10, both have closely built terraced and semi-detached streets where extensions frequently sit close to a shared boundary — exactly the situation where proper party wall management, alongside coordinated trade sequencing, matters most to keeping a project on track.

Extension Project Management — FAQ

Q.Why does trade sequencing matter so much on an extension?

Each trade generally depends on the previous one being finished correctly — plasterers need first-fix electrics and plumbing complete, decorators need plastering dry — so trades arriving out of order causes delays and can mean work being redone.

Q.What happens if a building control inspection is missed?

Some inspections need to happen before work is covered up, such as foundations before they're backfilled — missing that stage can mean digging back up or exposing covered structure so it can be properly checked, which is exactly the rework good sequencing avoids.

Q.Do I need a party wall agreement for every extension?

Only where the work is on, or close to, a shared boundary with a neighbouring property — where it applies, formal notice needs serving in good time, and we factor this into the project programme from the outset.

Free Extension Project Management Quote

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