Tradespeople at work on a London building site

Building and Trade Services in London

Every service on this page is carried out by one team. That means a loft conversion, an extension or a full renovation can include its plumbing, heating, electrics, tiling and decorating in one programme of work, with one quote and one project manager. It also means that when you only need a single trade, you are dealing with a company that understands the whole house.

Two kinds of work

  • Construction & conversionsLofts, extensions, renovations, new builds…10
  • Trades & home servicesPlumbing, electrics, decorating, tiling…5

Choose the type of work you are planning below. Each service page explains what is involved, how long it usually takes, what affects the price and what we need to know at the survey.

Category 01

Construction and Conversions

10 services
01 / 15
Loft conversion bedroom

01 — Construction

Loft Conversions

A loft conversion is usually the most cost-effective way to add a bedroom and bathroom to a London house. We assess your roof structure and head height at the survey, recommend the type that suits your home and handle the structural work, staircase, wiring, plumbing and finishing. Find out more about our loft conversions.

  • Velux loft conversionRoof windows fitted into the existing roof slope, with no change to the roof shape. Usually the simplest and least disruptive way to use a loft with enough head height.
  • Dormer loft conversionA box-shaped extension built out from the rear roof slope, giving full standing height and room for a bedroom and en-suite.
  • Hip-to-gable loft conversionFor semi-detached and end-of-terrace houses with a sloping side roof: the side is built up into a vertical gable wall to create a much larger loft, often combined with a rear dormer.
  • Mansard loft conversionThe rear roof slope is rebuilt almost vertically with a flat top, giving the most usable space of any loft type. Usually needs planning permission and is common on London terraces.
  • L-shaped loft conversionTwo dormers joined in an L shape, one on the main roof and one over the rear outrigger. Popular on Victorian and Edwardian terraces for adding two rooms.
  • Trussed roof loft conversionMany post-1960s homes have W-shaped roof trusses rather than a traditional cut roof. The roof is re-supported with steel beams designed by a structural engineer, so the loft can be opened up and used.
  • Shell loft conversionWe complete the structural and weathertight work, including the dormer, steels, floor and staircase opening, and you finish the interior yourself or with your own trades.
Garage converted into a home office
02 / 15

Garage Conversions

An integral or attached garage can become a study, playroom, bedroom or utility room. We fill in the door opening, insulate the floor, walls and roof, add windows, heating and electrics, and get the conversion signed off under building regulations.

Find out more about our garage conversions
Finished basement living space
03 / 15

Basement Conversions

Converting a cellar or digging out a new basement creates space without changing the look of the house from the street. Waterproofing, structural support and ventilation decide whether a basement stays dry and usable, so we plan them first.

Find out more about our basement conversions
04 / 15
Kitchen extension

04 — Construction

House Extensions

From a side return that widens a Victorian kitchen to a double-storey extension that adds a bedroom above, we build extensions from drawings to handover, including the drainage, heating, electrics and finishes inside them. Find out more about our house extensions.

  • Side return extensionFills the narrow passage beside a terraced house to widen the kitchen, often with a glazed roof or roof lights to keep the space bright.
  • Wrap-around extensionCombines a side return and a rear extension in an L shape, creating the largest possible ground-floor space for an open-plan kitchen, dining and living area.
  • Double-storey extensionAdds space on two floors at once, typically a larger kitchen below and an extra bedroom or bathroom above, usually for a lower cost per square metre than two separate projects.
  • Kitchen extensionA single-storey extension built to create a bigger kitchen and dining space, with the drainage, heating, electrics and doors it needs.
05 / 15
Timber garden building

05 — Construction

Conservatories and Outbuildings

We install and repair conservatories and build garden structures, from a summer house for the warmer months to a made-to-measure shed built to fit the space you have. Find out more about our conservatories and outbuildings.

  • Conservatory installation and repairNew conservatories, and repairs to leaking roofs, failed seals and tired frames on existing ones, including roof replacements.
  • Shed installation and repairAssembly and installation of flat-pack or bought sheds on a proper base, plus repairs to roofs, floors and doors.
  • Summer house constructionTimber summer houses built on a solid base, with power and lighting added if you want to use the space all year.
  • Garden shed constructionSheds built from scratch to your size and layout, for awkward gardens or when an off-the-shelf shed will not do.
06 / 15
Renovated kitchen

06 — Construction

Renovations and Refurbishments

Whether it is one tired room or a whole house that needs rewiring, replumbing and replastering, we plan the renovation so each trade follows the last in the right order. Period properties get the extra care their original features need. Find out more about our renovations and refurbishments.

  • Full house renovationRewiring, replumbing, structural changes, new kitchen and bathroom, plastering and decorating, planned as one project so each trade follows the last.
  • Kitchen renovationA new kitchen within your existing space, including removing the old one, plumbing, electrics, units, worktops, tiling and flooring.
  • Bathroom renovationA complete new bathroom, from stripping out and waterproofing to the new suite, shower, electrics, extraction, tiling and decorating.
  • Period property restorationCareful repair and upgrading of Victorian, Edwardian and older homes, keeping original features such as cornicing, sash windows and lime plaster where possible.
New house under construction
07 / 15

New Builds

For new houses and small blocks of flats, we manage the build from groundworks and foundations to the finished interiors, coordinating the structure and every trade under one programme.

  • New build homesConstruction of new houses from groundworks and foundations to the finished interior, including self-build and bespoke homes.
  • Building flatsConstruction of small blocks of flats and residential developments, managed as one programme from the ground up.
Find out more about our new builds
Commercial office fit-out
08 / 15

Commercial Construction

We carry out building work for commercial premises and plan it around your business, so disruption to staff and customers is kept to a minimum.

Find out more about our commercial construction
09 / 15
Construction worker on a building frame

09 — Construction

Piling and Underpinning

Mini piling gives new extensions and buildings a solid foundation on difficult ground, and underpinning strengthens existing foundations affected by subsidence or deepened for a basement. Find out more about our piling and underpinning.

  • Piling contractorsMini piling to create deep, stable foundations for extensions and new buildings on poor or clay ground, including sites with restricted access.
  • Underpinning contractorsStrengthening or deepening existing foundations to deal with subsidence or to lower a floor for a basement, following a structural engineer's design.
10 / 15
New driveway

10 — Construction

Driveways

We lay new driveways in the material that suits your home and budget, with a proper sub-base and drainage so the surface lasts. Options include block paving, resin-bound, tarmac, gravel, concrete, stone setts and crazy paving. Find out more about our driveways.

  • Block paving drivewayConcrete or clay blocks laid on a compacted sub-base in a pattern of your choice. Hard-wearing, easy to repair, and available in permeable versions.
  • Resin-bound drivewayNatural stone aggregate mixed with resin and trowelled smooth over a solid base. Seamless, low-maintenance and permeable, so rainwater drains through.
  • Tarmac drivewayA practical, cost-effective surface laid hot over a compacted sub-base, with edging kerbs and falls to carry water away.
  • Gravel drivewayA quick, affordable and naturally draining option, laid over a weed membrane and often stabilised with grids so the gravel stays in place.
  • Concrete drivewayA strong, long-lasting slab with expansion joints, available plain or pattern-imprinted to look like stone or brick.
  • Cobblestone and stone sett drivewayNatural granite or sandstone setts laid by hand for a traditional finish that suits period homes and lasts for decades.
  • Crazy paving drivewayIrregular pieces of natural stone laid on a concrete base and pointed, for a characterful, individual look.

Category 02

Trades and Home Services

5 services · 60 jobs
11 / 15

Plumbing Services

Our plumbing and heating work covers everyday plumbing, drainage, boilers, central heating, underfloor heating and appliance installation. Gas work is always carried out by registered engineers. Find out more about our plumbing services.

Heating engineer working on a boiler

General Plumbing 07

  • Emergency plumbingUrgent help with burst pipes, major leaks and overflowing water, to stop the damage first and then repair the cause.
  • Bathroom plumbingFitting and replacing toilets, basins, baths, showers and their pipework and wastes, without a full bathroom renovation.
  • Kitchen plumbingKitchen sinks, taps, waste traps and isolation valves, fitted or moved as part of a new layout.
  • Leak detection and pipe repairsFinding hidden leaks behind walls and under floors with the least possible damage, then repairing the pipe.
  • Saniflo installationMacerator toilets and pumps for new bathrooms where normal gravity drainage is not possible, such as lofts, basements and under-stairs cloakrooms.
  • Gas plumbingInstalling, moving and testing gas pipework for boilers, cookers and fires, carried out by registered gas engineers.
  • Pipework installation and repairNew and replacement water pipework in copper or plastic, including replacing old lead pipes.

Drainage 07

  • Drainage and blocked drain servicesOur full drainage service for homes and businesses, from clearing blockages to surveys, repairs and new drains.
  • Drain unblocking and cleaningClearing blocked sinks, toilets, gullies and outside drains, and cleaning the pipe so the blockage does not return.
  • CCTV drain surveysA camera inspection of your drains that shows cracks, root ingress and blockages, with a report. Useful when buying a home or planning an extension.
  • Emergency drainage servicesFast help with overflowing manholes, sewage backing up and drains that have stopped working completely.
  • Drain repairs and liningRepairing cracked or damaged drains, often without digging, by lining the pipe from inside.
  • Drain installation and replacementNew drains, inspection chambers and soakaways for extensions and new builds, and replacement of drains too damaged to repair.
  • Drain jettingHigh-pressure water jetting that clears grease, scale and roots from inside drain pipes.

Heating 10

Boilers 06

  • Boiler installationA new boiler for a new system or a change of system, such as a switch from a system boiler to a combi.
  • Boiler repairDiagnosing and fixing faults such as pressure loss, error codes and no hot water on boilers that are still worth repairing.
  • Boiler replacementSwapping an old or inefficient boiler for a new one, with the system cleaned and protected so the new boiler lasts.
  • Boiler servicingAn annual check and service that keeps your boiler safe and efficient, as many manufacturers' warranties require.
  • Landlord gas safety certificatesThe annual gas safety check (CP12) landlords are legally required to have for rented homes, carried out by registered engineers.
  • Emergency boiler servicesUrgent help when your boiler breaks down and you have no heating or hot water.

Appliances 05

  • Washing machine installationPlumbing in a new washing machine with a proper water supply, valve and waste connection.
  • Dishwasher installationInstalling freestanding and integrated dishwashers, including new plumbing where there was none before.
  • Gas cooker installationConnecting freestanding and range cookers safely to the gas supply, carried out by registered gas engineers.
  • Gas oven installationFitting built-in gas ovens into your kitchen units, connected by registered gas engineers.
  • Gas hob installationFitting new or replacement gas hobs into your worktop, connected by registered gas engineers.
12 / 15

Electrician Services

From a new consumer unit or full rewire to fire alarms, solar panels and EV chargers, our electrical work covers homes and commercial premises, with notifiable work certified as the regulations require. Find out more about our electrician services.

Find out more
13 / 15

Decorating Services

Good decorating starts with preparation. We repair cracks, holes and damaged plaster before painting, wallpapering or glossing, so the finish lasts. Find out more about our decorating services.

  • Filling cracks in wallsRaking out and filling hairline and settlement cracks so they do not show through the new paint.
  • SiliconingRemoving old, mouldy sealant and resealing baths, showers, basins and worktops with fresh silicone.
  • Plaster patch repairCutting out blown or damaged plaster and patching it so the wall is smooth and ready for decorating.
  • PaintingInterior and exterior painting of walls, ceilings and masonry, with proper preparation first.
  • Wallpaper hangingHanging lining paper, standard and patterned wallpapers, and feature walls, with the pattern properly matched.
  • Fixing ceiling cracksRepairing cracked plasterboard joints and lath-and-plaster ceilings, and checking the cause before we cover it.
  • Repairing holes in wallsPatching holes in plasterboard and plaster left by old fixings, door handles or removed fittings.
  • GlossingPainting skirting boards, door frames, doors and banisters in gloss or satinwood for a hard-wearing finish.
Find out more
14 / 15

Tiling and Grouting

We tile kitchens and bathrooms, regrout tired tiled surfaces, replace cracked or chipped tiles and seal tile joints to keep water out. Find out more about our tiling and grouting.

Find out more
15 / 15

Handyman Services

For the smaller jobs around the home, such as fitting curtain poles, blinds and mirrors, and general hanging and fitting, our handyman service gets it done properly. Find out more about our handyman services.

  • Curtain fittingFitting curtain poles and tracks securely, including bay windows and plasterboard walls.
  • Blind fittingFitting roller, Roman, Venetian and vertical blinds, inside or outside the window recess.
  • Mirror fittingHanging mirrors safely, including large and heavy mirrors on plasterboard and tiles.
  • Hanging and fitting servicesGeneral hanging and fitting jobs around the home, such as pictures, shelves and other fixtures.
Find out more

Not sure?

Not sure which trade you need?

Describe the job — or send a photo on WhatsApp — and we will point you in the right direction.

One roof

Projects That Need More Than One Trade

Most home improvement projects cross several trades, and this is where having them under one roof saves the most time and trouble.

Loft conversion

Kitchen extension

  • Drain installation & replacement
  • Underfloor heating
  • Kitchen plumbing
  • Kitchen electrics

Bathroom renovation

  • Bathroom plumbing
  • Electrics
  • Waterproofing
  • Tiling
  • Decorating

Basement conversion

When you tell us about your project, we plan every trade it needs from the start, so nothing is left for you to organise later.

Urgent call-outs

Urgent Plumbing, Heating and Electrical Help

Some problems cannot wait for a survey. For a burst pipe, a boiler breakdown, no heating, an overflowing drain or an electrical fault, call 020 0000 0000 and we will tell you straight away when we can get to you.

Call now020 0000 0000

Burst pipe? Turn off your stopcock first.

Smell gas? Leave the property and call the National Gas Emergency Service on 0800 111 999.

Pricing

How to Get a Price

Three simple steps — and nothing is booked until you have seen exactly what is included.

  1. 01

    Tell us about the job

    Choose the service, give us your postcode and add photos if you have them.

  2. 02

    Free site survey

    For building projects we visit, check the practical points and talk through what you want. Smaller trade jobs can often be priced from photos and a short call.

  3. 03

    Written, itemised quote

    You see exactly what is included and how payments are staged before any work is booked.

Where we provide these services

We provide every service on this page across London, with most of our work in Ilford, Barking, Dagenham, East Ham and Orpington.

See all areas we cover

FAQs

Frequently Asked Questions

Straight answers to the questions we are asked most.

Still have a question?

Talk to us directly — we're happy to help, even if you're not ready to book.

Choose the main piece of work, such as a loft conversion, extension or renovation, and tell us what else it involves. We plan the plumbing, electrics, tiling and decorating as part of the same project, so you only need to make one enquiry and receive one quote.

Yes. Alongside building projects, we take on single-trade jobs such as a boiler service, a leaking pipe, a new socket, a room to redecorate or a blind to fit. Small jobs are priced before any work begins.

Yes. If you already have drawings, and planning permission where it is needed, we can price and build from them. We check the drawings at the survey and raise any practical questions before we quote.

Yes. We carry out commercial construction and commercial electrical installation, and we plan the work around your opening hours to keep disruption down.

More questions? See our frequently asked questions.

Start your project

Not Sure Where to Start?

Tell us what you want to achieve and where you are. We will recommend the right service, arrange a free site survey and send you a written quote.

Prefer to write? Email info@omnibuilders.uk or use our contact form.