Welling — Covering London & Surrounding Areas

Built Right.
From Start to Finish.

From a single room upgrade to a whole-house transformation — Mi Building Contractors brings craft, care, and real experience to every job across London and the surrounding areas.

Fully Insured

Design & Build

Free Quotes

All Trades Covered

Get a Free Quote → 07939 259889

Get Your Free Quote

No obligation. We'll call you back within 24 hours.

Get Your Free Quote

No obligation. We'll call you back within 24 hours.

WHAT WE DO

Built for Every Part of Your Home.

Kitchens, bathrooms, extensions, loft conversions, full refurbishments — we cover the lot. One company, every trade, no subcontracting surprises.

Kitchen Refurbishments

Supply and fit or fit-only — we take your kitchen from first conversation to completed room, managing every trade so you don't have to chase anyone.

Bathroom Refurbishments

Simple refresh or full strip-out and rebuild — tiling, plumbing, fixtures, and finishes are all handled by our own crew to a consistent standard throughout.

Extensions

We take extensions from foundations to finished walls — single or double storey — with the design and construction managed entirely by our own team.

Loft Conversions

Unlock the space above you. We take care of the structure, stairs, insulation, electrics coordination, and fit-out — turning an empty loft into a proper, liveable room.

Full Refurbishments

When a property needs everything doing, we're the team to call. We strip it back, plan the work properly, and rebuild it to a standard you'll actually be proud of.

Part Refurbishments

Not every job needs a full overhaul. We target the rooms or areas that need attention and bring them up to the same quality as the rest of your home.

Garden Structures & Outdoor Buildings

Garden rooms, outbuildings, pergolas, patio structures — we build outdoor spaces that are solid, properly finished, and made to last long after the project is done.

General Building Works

Blockwork, brickwork, internal walls, structural alterations — if it involves building, we can do it. No job done halfway, no shortcuts taken.

WHY MI BUILDING

We Take It Personally.

Every job we take on gets the same level of care — whether it's a single room or a full property. We've built our reputation one project at a time, and we intend to keep it that way.

One Team from Drawing to Done

Your designer and your builder are the same team — which means what gets drawn is what gets built. No blame-shifting between contractors, no gaps in communication.

Properly Covered, Properly Experienced

We carry full public liability cover and have earned our experience the right way — years of hands-on work across refurbishments, extensions, groundworks, and conversions.

We Show Up and We Finish the Job

Your home gets treated with the same care we'd give our own. We arrive when we say, work cleanly, and see every project through to a finish we're genuinely proud of.

Mi Building Contractors — project detail

CLIENT TESTIMONIALS

What Our Customers Say

Excellent ★★★★★ 9.8 / 10 | Checkatrade Verified

Leave a Review →

Verified Reviewer

DA1 · Nov 2025

★★★★★ 9.33/10

Best Building Contractors

Fantastic result on our full 3-bedroom house refurbishment. Very reliable, trustworthy and highly skilled with great attention to detail. The finish throughout — kitchen, bathroom, external rendering and garden — is high-end. The team were professional, tidy and helpful. Highly recommended.

Verified Reviewer

SE18 · Jan 2025

★★★★★ 10/10

A Good Job Well Done

Mi Building Contractors built a small extension to house a toilet and basin with a new doorway into my kitchen diner. They minimised disruption throughout and were mindful of the neighbours. Very pleased with the standard of work.

Verified Reviewer

DA1 · Aug 2024

★★★★★ 10/10

Every Room Needed Work — Delivered on Every One

Our house needed plastering and decorating, but when we stripped the walls there were major problems. It cost a lot less than we feared. They were all really professional and good at what they do. We are very pleased with the finished project — I'll happily have them back anytime.

Verified Reviewer

DA16 · May 2023

★★★★★ 9.75/10

Rear Extension — Great Result

Mike and his team did a great job on our rear extension. The job presented numerous unexpected challenges but all were dealt with well and in good time. Mike has also kept in touch and come back to tidy bits up. Would recommend highly.

Verified Reviewer

DA14 · Mar 2023

★★★★★ 10/10

2 x En-Suites Refitted

Mikey and his team fitted 2 modern en-suites. Very happy with the finished look and the service provided.

Verified Reviewer

DA16 · Mar 2023

★★★★★ 10/10

Loft Conversion — Superb Throughout

Mikey was superb throughout the 3-month project to convert a truss loft into two bedrooms and a landing. Mikey and Jason spent weekends of their own time to keep the project on track. They truly treated my home as if it were their own. Couldn't be happier.