OLIVEIRASCONSTRUCTION LTD

From drawing to built, by one team

Extensions, loft conversions and renovations across Sutton and London. We arrange the drawings and approvals, build the job ourselves and hand it back clean.

Plan your project WhatsApp Igor
9.67/10on Checkatrade
£5mpublic liability
Same dayreply to enquiries
Our carpenter decking a new flat roof on a rear extension Dormer loft conversionRear extension4.5 m2.3 mhead heightSteel beamGround floorFirst floorLoft
Rear extension and dormer loftSection A–A, typical London terrace
Oliveiras ConstructionDrawing to handover

  • One team

    Drawings, build and finish handled by us, with one contact from start to finish

  • 12 weeks

    Our Streatham loft conversion, from start to handover

  • £5m + £10m

    Public and employers liability insurance

  • 9.67/10

    Verified reviews on Checkatrade

What we build

Large projects and smaller jobs, all done by our own team. Choose a service to see what is included.

House extensions

Single and two-storey rear and side extensions, from foundations to the finished room.

View serviceExtensions
2.3 mDormer

Loft conversions

Velux, dormer, hip-to-gable and mansard lofts that add a bedroom and bathroom.

View serviceLofts
Wall removedSteel beam over

Renovations

Full and partial refurbishments, knock-throughs and reconfigured layouts.

View serviceRenovations
Tiled splashback

Kitchens and bathrooms

Strip-out, fitting and every finish, from tiling to worktops.

View serviceKitchens
Wooden staircasePanel door

Carpentry and joinery

Doors, staircases, skirting and fitted furniture, made and fitted to your home.

View serviceCarpentry

Driveways and patios

Excavation, retaining walls, steps and paving at the front or back.

View serviceDriveways

One phone number for the whole job

Building work goes wrong between trades: the plasterer waits for the electrician and the decorator blames the plasterer. With us, the same team plans, builds and finishes, so one person is responsible for your project.

Trade by trade

  • Find your own architect
  • Chase separate builders, plasterers and carpenters
  • Several quotes and invoices
  • Nobody owns the delays

With Oliveiras

  • We arrange drawings and building control
  • Our team does every stage
  • One written quote
  • Igor is your contact throughout
Our team digging out a front garden for a new driveway
Our team on site, preparing a new driveway

How a project runs

The same five stages on every job, so you always know what happens next.

  1. Week 0

    Free visit

    We measure up and talk through what you want and your budget.

  2. Before the build

    Drawings and approvals

    We arrange drawings, calculations and building control where needed.

  3. Within 48 hours of the visit

    Written quote

    Itemised, with materials, timings and payment stages.

  4. On site

    The build

    Daily progress updates and a tidy site every evening.

  5. Final day

    Handover

    We walk the finished job with you and leave the house clean.

Recent projects

Drag the gold handle to compare each job.

Extension during the buildExtension with a finished porcelain floorDuringFinished

Single-storey rear extension

London
Scope Groundwork to flooring
Front garden dug out with a mini diggerFinished block-paved driveway with stepsBeforeAfter

Driveway, steps and retaining wall

South London
Scope Excavation to paving
2.3 mDormerPhotos soon

Dormer loft conversion

Streatham SW16
Duration 12 weeksReview 10/10

See all projects

Plan your project in a minute

Choose a project and size to see a guide price, how long it takes on site and the build stages. Then send it to Igor for a free visit.

What are you planning?
Approximate floor area
20 m²

A typical rear extension is 15–25 m². A loft is usually 25–40 m².

Finish level

Guide price, London 2026

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    Send this to Igor

    Guide prices for London based on published 2026 cost guides, before planning, drawings and party wall fees. Your written quote after a free visit sets out the actual price.

    “From start to finish, the team was professional, reliable, and extremely hardworking.”

    Verified Checkatrade review, loft conversion in Streatham SW16, May 2026

    Read our reviews on Checkatrade

    Where we work

    Based in Sutton, working across South London, North Surrey and the rest of London.

    • Sutton SM1–SM3
    • Cheam SM2, SM3
    • Carshalton SM5
    • Wallington SM6
    • Worcester Park KT4
    • Morden SM4
    • Croydon CR0
    • Purley CR8
    • Mitcham CR4
    • Kingston upon Thames KT1, KT2
    • Wimbledon SW19
    • Tooting SW17
    • Streatham SW16
    • Balham SW12
    • Epsom KT17–KT19
    • Banstead SM7
    • Bromley BR1, BR2
    • Across London Ask us

    Tell us about your project

    Free visit and written quote. We reply the same working day.

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