Wasti Developments
Wasti Developments
A Wasti Developments rear extension

Build it once. Build it right.

A family-run construction firm building extensions, new builds and refurbishments across London. Fixed pricing, one project lead, twenty years on the tools.

Takes 90 seconds. No obligation. Reply within one working day.

  • 0+

    Years

    London since 2005

  • 0

    Reviews

    Five-star, every client

  • Fixed

    Pricing

    Itemised cost plan

  • 0%

    In-house

    No subcontractors

“A complete renovation, two storey side and rear extensions plus a full interior redesign with five en-suite bathrooms. Mandip managed and delivered on budget. As a fussy person with a strong focus on detail, the results are very pleasing and of high quality.”

Avtar

Digital Partner, Watford

A

Live across London

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Built by London builders

Every project runs the way you would, if you had the time.

No stranger turning up unannounced. No surprise bill on the final week. No vague provisional sums for the things every builder can quote.

  • Our own carpenters handle skirting, architraves, fitted joinery and the final finish, same hands from first fix to handover.

How it works

From first call to final snag.

  1. 01

    Consult

    Understand your goals and project scope.

  2. 02

    Plan

    Design, approve and finalise every detail.

  3. 03

    Build

    Expert construction with clear communication.

  4. 04

    Deliver

    Handover, finish and ongoing aftercare.

In their words

What homeowners actually say.

5.0 average

Finest.

Wasti Contractors completed our house renovation, a 6m extension, outhouse and loft conversion. The work started on plan and any changes we requested were accommodated. Communication was excellent and there were no surprises with the final bill. Mandip is an honest, friendly contractor who gives you good ideas and is passionate about his work.

Amisha

Sales Manager, Colindale

High Grade.

Wasti have worked on three of my properties and each time the work has been completed to a high standard. Full refurbishment, extension and loft conversions. The team are knowledgeable with many years of experience in the building trade and provide a complete service. I will continue to use them for any future work.

Kish

Director, Kenton

Elite.

I have used Wasti Contractors for multiple projects, full house renovation, landscape gardening and a new outbuilding. Extremely satisfied with the quality of their workmanship, professionalism and reliability. The completion of all my projects has been to a very high standard.

Ragini

Owner, Colindale

Exceptional.

Mandip helped us with the vision we had for our driveway and came up with some very useful advice. The work was undertaken efficiently and the workmen constructed the driveway very robustly with a strong work ethic. He listened and adapted to what we wanted to achieve. The end result was brilliant and we have had numerous compliments from passers-by.

Tripta

Therapist, Greenford

Experts.

Wasti Contractors are expert loft specialists. Their work is of a high standard. I recommend them.

Eli

Design Engineer, Mill Hill

Brilliant.

Service provided by Wasti Contractors had been greatly appreciated and workmanship to a very high standard. I have also recommended his work to others, friends and family.

Bhavesh

Motor Technician, Colindale

Professional.

A loft conversion plus a new en-suite, finished a week ahead of schedule. Mandip kept me informed every step of the way and the team were tidy, polite and properly experienced. The price we agreed at the start is the price we paid at the end. Rare in this trade.

Sara

Marketing Director, Stanmore

Honest.

Full kitchen-diner extension with a run of bi-folds onto the garden. Mandip walked us through every line on the quote before any work started, and the changes we asked for mid-build were costed in writing on the same day. No hidden extras, no awkward conversations.

David

Solicitor, Northwood

Trustworthy.

Loft conversion adding two bedrooms and a bathroom above our terrace. The site was kept clean throughout, and the team were considerate of our neighbours, which mattered to us. Three years on, not a single snag has come back.

Naina

GP, Pinner

Outstanding.

Two-storey side extension on a Victorian semi. As an architect I am picky about detail, and the tolerances they held to were spot on. Brickwork courses ran true, joinery was crisp, the rendering was even and the rainwater goods went in straight. Hard to fault.

Rohit

Architect, Wembley

Reliable.

A full bathroom refurbishment, strip-out to tile finish. The team arrived at eight every morning, worked through, and swept up before leaving the site. The plumbing first-fix was done to the millimetre. Genuinely the easiest builder experience we have had.

Hina

Accountant, Ruislip

Genuine.

New driveway and a re-landscape of the front garden. The dig went smoother than expected so the job came in below quote, and Mandip refunded the difference without us having to ask. That tells you everything about how this firm operates.

Ankit

Operations Lead, Surbiton

A completed Wasti Developments garden studio

The Studio

From the first call
to your final snag.

Wasti Developments started in Hayes in 2005 on a single rear extension. Twenty years on, we’re still a small studio, directors on site every week, the same project lead per client, never more than three live builds at a time.

FAQ

Quick answers to common questions.

Anything else, just call the office on 8am-6pm weekdays.

  • Across Greater London and the western home counties, Hayes, Ealing, Hounslow, Uxbridge, Richmond, Kingston and surrounds. If we can't reach in under an hour, we'll say so on the call.

  • Yes. We work with planning consultants and structural engineers on permitted-development, householder applications, and full-plans applications, and submit building-regulations notices ourselves. The paperwork is part of the price.

  • Fixed itemised cost plan after the drawings stage. No vague provisional sums for the obvious things. Any change order is in writing before any work starts.

  • £5m public liability, £10m employer's liability, all-risks contract works cover. TrustMark and FMB-affiliated. Documents are sent before contracts are signed.

  • Single-storey rear extensions: 12-16 weeks. Two-storey extensions: 16-22 weeks. Whole-house refurbishments: 16-28 weeks. New builds: 9-14 months. Always an estimate until the drawings are settled.

  • 12 months on workmanship from the date of completion, plus the manufacturer warranty on every fitted product. We document the snagging walk and close it before final payment.

Ready to begin

Ready to build something exceptional?