Extensions in Greenstead

Extending in Greenstead

Colchester’s largest post-war estate, where the first question is not what the planners allow but what your title deeds say you own.

Greenstead sits about a mile and a half east of Colchester city centre, on the rising ground north of the Colne, with Salary Brook running down its eastern side. Building began here in 1955 and it became the borough’s biggest council estate: roughly 2,800 homes, most of them up by the middle of the 1960s, with infill continuing until 1985. The 2021 census counted 14,377 people in the ward across about three square kilometres, which makes it one of the more densely built parts of the city.

Right to Buy changed the tenure without changing the buildings. A large share of these houses are now privately owned, and they are being extended by the people who bought them. That is the work here: 1950s and 1960s local authority stock, solidly built, generously plotted, and short of the one downstairs room a modern family actually uses.

The authority is Colchester City Council

Greenstead is inside the city, which sounds obvious until you drive three miles further along the same road.

Applications for Greenstead go to Colchester City Council, and Colchester City Council Building Control is the body we notify. That is worth stating plainly because the boundary is closer than people think. Carry on east on the A133 and you cross into Tendring District within a few minutes: Elmstead Market has a Colchester postal address, a CO7 postcode and a different planning authority entirely. Greenstead does not. Here it really is Colchester.

No conservation area covers the estate. Colchester has a couple of dozen designated areas and they are concentrated in the historic core, the Hythe, New Town, the Garrison and the outlying villages. That matters more than it sounds, because a conservation area turns a property into what the legislation calls article 2(3) land and strips out several permitted development rights. None of that applies in Greenstead, so the rights are intact unless something else has removed them.

Tenure decides whether you can extend at all

On an estate built for rent, the ownership question comes before the planning question.

Three situations turn up here and they are not the same job.

If you bought the freehold of a house under Right to Buy, you have the same permitted development rights as anyone else. The house’s history has no bearing on what you may build. What can bear on it is the transfer document: sales of former public housing often carry restrictive covenants, and a covenant is a private contract between landowners rather than planning law. The council does not enforce it and a planning permission does not override it. If the deeds are somewhere in a drawer, read them before you pay anyone to draw anything.

If the property is still rented from the council or a housing association, the building is not yours to alter. Consent from the landlord comes first and it is a separate conversation from planning.

Leasehold flats and maisonettes are the one people get wrong. Greenstead has blocks as well as houses, and Part 1 of the permitted development order applies only to a dwellinghouse. A flat, or a building containing flats, is excluded from it by definition. A leaseholder in a maisonette has no permitted development rights to extend, whatever the neighbours in the houses opposite have done.

The houses, and what the estate layout gives you

Wide plots, deep gardens, and a rear access problem that depends entirely on where you sit in the run.

The stock is mostly semi detached pairs and short terraces of four to six, brick built, two storey, with shallow pitched gabled roofs. Plots are wide by the standards of the interwar suburbs west of the city, gardens are long, and the houses sit back from the road behind open frontages. For a rear extension that is a good starting position: there is room behind the house and the ground is level.

Access is the split. An end of terrace or an outer half of a semi usually has a side gate and a route round. A house in the middle of a run has nothing, and every barrow of muck and every pack of blocks goes through the hall. That is not a small difference in price and any quote that has not asked the question has not priced your job.

Garages are the other estate quirk. Post-war layouts put cars in garage blocks away from the houses rather than attached to them, so the garage conversion that transforms a 1980s detached is mostly not available here. The equivalent move is the old store or outhouse off the back kitchen, which is usually single skin, uninsulated and sitting on almost nothing, and which is more often demolished into the new extension than kept.

Roofs vary by phase. The earlier Greenstead houses tend to have purlin roofs with usable volume in them. The later phases, built as trussed rafters came in during the mid 1960s, are filled with prefabricated W frames that cannot be cut about. Which one you have decides whether a loft conversion is a conversion or a rebuild, and it is settled by putting a head through the hatch.

What permitted development actually allows here

Three metres is the limit without an application. It is not the limit on what you can build.

On a semi detached or terraced house, a single storey rear extension is permitted development up to three metres beyond the original rear wall. On a detached house the figure is four. Alongside that sit the limits that catch people out more often than the depth does: overall height no more than four metres, and where any part of the extension comes within two metres of a boundary, the eaves may be no higher than three. On these plots that eaves rule is usually the one that decides the roof form, and it is why so many rear extensions here end up flat roofed with rooflights rather than pitched.

Beyond three metres there is a second route. The larger home extension procedure allows up to six metres on a semi or a terrace and eight on a detached house, subject to height limits and to a neighbour consultation stage. You notify the council, adjoining owners get twenty one days to object, and if any of them do the council decides whether the effect on their amenity is acceptable. It is not a planning application and it is not permitted development either. It sits between the two, and it is available in Greenstead precisely because there is no conservation area to disqualify it. We set out how it runs in the guide to the larger home extension prior approval scheme.

Permitted development is a right, not a permission, and it can be removed. Conditions on an original estate permission, or on a later infill development, sometimes strip it out. A lawful development certificate is the way to prove you have it, and it is cheap next to the cost of being wrong.

The ground changes across the estate

Gravel in most of it, a band of London Clay through it, and alluvium down in the brook valley.

Greenstead is not a single ground condition. The old parish description has it about right: mostly glacial gravel, with a band of London Clay running south west to north east, glacial loam towards the east, and alluvium along the valleys. Two houses on the same estate can want different foundations.

Where you are on the gravel, the news is good. Founding depths are often modest, the trench stands up reasonably well and a soakaway will genuinely soak away. Where the clay band runs through, you are into shrinkable ground, seasonal movement and the influence of any mature tree within reach, which pushes the dig deeper and the price with it.

Down towards Salary Brook the land falls away sharply and the ground becomes alluvial, which is soft, variable and no use as a bearing stratum at shallow depth. The brook itself carries the flood zone and the local nature reserve that runs beside it, and it is the same water that comes down past Ardleigh and its reservoir. The estate proper stands above all that, so for most Greenstead addresses the brook is a view rather than a constraint, and it is checked on the address rather than assumed either way.

What settles it is a trial hole. Digging one before the quote is written costs a morning and removes the single biggest unknown in the whole job.

Skips, scaffold and the road outside

Two different councils are involved in an extension here, and only one of them is the planners.

These streets were laid out when a household car was not assumed, so off street parking is patchy and the kerbside is busy. A skip standing on the highway needs a permit, and that comes from Essex County Council as highway authority rather than from the city council. Scaffold over a footway is the same story. Where there is a driveway, everything gets easier and cheaper, and where there is not, the delivery plan becomes part of the programme rather than an afterthought.

Party wall matters have a wrinkle of their own here. Because so much of the estate is semi detached and terraced, the Party Wall etc. Act 1996 applies to a large share of the work, and on a Right to Buy street your adjoining owner may be the council or a housing association rather than the family next door. Notice served on a corporate landlord takes longer to come back than notice served on a neighbour who can sign it at the kitchen table, so it goes out early. The party wall guide covers which section applies to what.

One larger change is coming to this side of the city. The garden community planned on the Tendring and Colchester borders, east of Greenstead, brings several thousand homes, a country park along Salary Brook and a link road between the A120 and the A133. It does not alter what you may build on your own plot. It will alter the traffic on the roads your materials arrive on.

What people build in Greenstead

The briefs follow directly from the plan of a 1950s estate house.

The single storey rear extension to make a kitchen and dining space out of two small rooms is the commonest by a distance, usually with the old back store swallowed into it. Knocking the through lounge into the hall or the new extension comes second, and that is a structural opening with a beam, padstones and calculations rather than a demolition job.

Adding a downstairs shower room and utility is a frequent third, often for a relative moving in. Loft conversions happen where the roof is a purlin roof and the head height is there, and where it is not, the honest answer is that the money goes further at ground level. Our guide to extending a semi detached house goes through the options in order of cost.

Questions we get asked in Greenstead

Does it matter that the house was a council house?

Not to the planners. If you own the freehold you have the same rights as any other homeowner. It can matter through the deeds, because transfers of former public housing sometimes carry covenants, and those are a private matter that planning permission does not touch.

My neighbour built theirs without permission. Can I?

What they built may well have been permitted development, which is not the same as building without permission. It may equally have been neither. What is on the plot next door is not evidence about your plot, and the way to find out about yours is to check it.

Can I go out six metres?

Possibly, through the larger home extension route rather than as of right, and subject to the height limits and to what your neighbours say when they are consulted. Whether it is a good idea is a separate question, because a deep extension on a narrow plot can leave the middle of the house dark.

Do I need a party wall notice for a semi?

Usually yes. Cutting into the shared wall, building up to the boundary, or excavating within three metres of next door below the level of their footings all require formal notice. The periods are fixed in law and run from service, so it is started early rather than the week before the digger arrives.

Getting a price for a Greenstead extension

We are based at West Bergholt, a short run across the north of the city, so this is local work rather than a postcode on a coverage map.

Our team comes out and looks at the things that decide the price: the ground, the access down the side or the lack of it, the roof structure, the drain runs, the boundary distances and what the deeds say. Most people who call us already have drawings and permission and want a builder to price the work and build it. That is the ordinary job here, and we are glad to work to somebody else’s plans. Where the drawings do not exist yet, we bring in the technician who draws it and the structural engineer who calculates it, we handle the route through Colchester City Council, we notify Building Control, and we run the job as main contractor so you are not standing between five trades who each blame the others.

We carry £2m public liability cover and build to current Building Regulations, through to the completion certificate. The survey and the quotation cost nothing.