Progress Estate Eltham Leak: Repairs in a Conservation Area

Turn the water off at the stopcock, usually under the kitchen sink or just inside the front door, then have the leak traced before anything is opened. In a Progress Estate cottage the pipework is old, the floor voids are shallow and the finishes are original, so the right repair is one small opening in exactly the right place. Internal plumbing repairs do not normally need permission, but anything that changes the outside of the house in this conservation area should be checked with Royal Greenwich planning first.

What makes these houses different?

The Progress Estate at Well Hall, SE9, was built by the government in 1915, in about ten months, to house munitions workers at the Royal Arsenal in Woolwich. It was designed under Frank Baines of the Office of Works as a garden village of cottages in a variety of designs. It was first called the Well Hall Estate, was sold in 1925 to the Royal Arsenal Co-operative Society and renamed Progress, and became a conservation area in 2007. Sources put it at around 1,086 houses and 212 flats.

For a plumber, a century-old wartime cottage means:

• Original or early pipework. Lead supply pipes under front gardens, iron in places, and joints that have seen a hundred years of hard water.
• Shallow floor voids. There is little space under the floors, so pipes are close to the boards and hard to reach without lifting them.
• Plumbing added in layers. Bathrooms, hot water and central heating were added over the decades, often by different hands, with runs that do not always follow the obvious route.
• Finishes worth protecting. Original floorboards, plaster, joinery and doors that owners have often spent years restoring.

Why trace first?

Water does not leak where it shows. In a cottage with shallow voids it runs along a joist or a pipe and comes out a metre or two away. The instinctive response, lifting boards where the stain is, often means lifting the wrong boards, then the next ones along, until half a floor is up.

Non-destructive tracing turns that round. The usual tools are:

• Thermal imaging, which shows a hot water or heating leak as a warm plume through a floor or wall.
• Acoustic listening, which picks up the hiss of pressurised water escaping from a pipe.
• Moisture mapping, taking readings across floors and walls to follow the wet area back to its source.
• Tracer gas, for underground supply leaks, pushed into the drained pipe and detected where it escapes.

The aim is one opening, of the right size, in the right place, and a repair that the next owner never knows was made.

Do I need permission to fix a leak?

For ordinary internal repairs, almost certainly not. Replacing a section of pipe under the floor, fixing a valve or renewing a joint is maintenance. The conservation area status matters when work changes the outside of the house or the street scene. Examples where you should check first:

• New pipes or vents running on a front or side elevation.
• Moving or adding a boiler flue on a visible wall.
• Digging up a front boundary or changing a front wall or hedge.
• Replacing original windows or doors to get pipes through.

Rules change, and some conservation areas have extra controls on top of the basics. Check Royal Greenwich’s planning pages or ask its conservation officer before any external work. A good plumber will route new pipework internally wherever possible so the question never arises.

How do I stop the water in a Progress Estate cottage?

1. Find the stopcock: try under the kitchen sink first, then under the floorboards or a hatch just inside the front door.
2. Turn it clockwise, gently. If it is seized, do not force it on old pipework; use the outside stop tap near the front boundary instead.
3. Open the cold taps to drain the pipes.
4. Switch off the immersion heater or water heater, and turn off the electrics at the consumer unit for any room where water is near sockets or lights.
5. Photograph the stain or wet area, with the time, before you move anything.
6. Call a plumber and tell them it is a Progress Estate house, so they come ready to trace rather than cut.

What should I tell the plumber?

• That it is a Progress Estate cottage and the finishes are original.
• Where the water is showing, and roughly when it started.
• Whether it gets worse when the heating is on, when a particular tap or shower is used, or all the time.
• Whether the boiler pressure gauge has been dropping.
• What the pipe at the stopcock looks like: dull grey and soft suggests lead.

That last one matters. If the supply is lead, it may be the leak, and it may be worth replacing. Thames Water supplies Eltham and can tell you about its lead pipe replacement scheme on 0800 316 9800.

What about heating leaks?

Heating was added to these cottages long after they were built, and the pipes run where they could be fitted. A dropping boiler gauge, a warm patch on a floor and no visible water usually means a heating pipe leaking under the boards. That is traceable with thermal imaging. The boiler itself needs a Gas Safe registered engineer, and if you ever smell gas call National Gas Emergency on 0800 111 999 first.

Blackheath’s Georgian and Victorian houses have the same tension between finding a leak and protecting the house, and our guide to protecting finishes in a Blackheath period house leak goes further into it. More on SE9 on our Eltham page.

Need a plumber now?

If you have a leak in a Progress Estate house and want it found without damage, Call 07868 281022. Tell us your postcode, where the water is showing, and whether the water is off. We do leak detection in Eltham and water leak repairs across SE9, and we agree the price with you before any work starts.