GLB PartnersConstruction & property maintenance

SE9 · Our base

Builders in Mottingham & Eltham

We're based in Mottingham, so SE9 is home turf. Extensions, loft conversions and refurbishments for the houses around us, from a team that's never far away.

What we build around SE9

Mottingham and Eltham are full of 1930s semis and terraces, with older Edwardian streets towards Eltham Park and Lee. The jobs we're asked about most are the ones these houses suit best: a rear extension to open up the kitchen, a hip-to-gable loft for an extra bedroom and bathroom, and a full refurbishment when a house hasn't been touched in decades.

  • Rear and side extensions
  • Hip-to-gable and dormer loft conversions
  • Full house refurbishments
  • Kitchen and bathroom renovations
  • Knock-throughs and structural steels
  • Garage conversions

Lofts and extensions on 1930s semis

A typical 1930s semi has a hipped roof, which leaves little headroom in the loft. Rebuilding the side slope as a full gable, then adding a rear dormer, turns it into a proper room with space for stairs and an en suite. Outside a conservation area, this is often permitted development, though building regulations approval is always needed.

At the back, a single-storey rear extension of up to 3 metres on a semi is often possible without planning permission, and up to 6 metres with prior approval from the council. Most people use it to create a kitchen, dining and family space that opens onto the garden.

See what a finished whole-house job looks like in our Forest Hill refurbishment, or read about loft conversions.

Questions about building in Mottingham and Eltham

Which areas around SE9 do you cover?

Mottingham, Eltham, New Eltham, Grove Park, Lee, Kidbrooke, Chislehurst, Sidcup and Blackheath, along with the rest of South East London.

Can you come out quickly for a site visit?

Usually, yes. We're based in Mottingham, so local visits are easy to fit in. Book a time online or send us a message and we'll arrange it.

Will a hip-to-gable loft need planning permission?

Often not. On many semis it can go ahead under permitted development, as long as the house isn't in a conservation area and the work stays within the volume limits. We check before you commit, and handle building regulations either way.

How do I get a quote?

Book a free site visit online, call 0844 818 0188 or send your details on WhatsApp to 07532 669431. We come and look at the space, talk it through and send an itemised quote.

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What our clients say

4.9from 11 Google reviews

GLB has been a star find for me. The whole experience of refurbishing our property was as close to being a pleasure as building work can be! Geraldo is a super nice guy and a very good listener; he's patient and remains a calming presence even when the inevitable unexpected snag crops up.
Geraldo runs a tight ship and his team are of the same high calibre—professional, efficient, and very tidy. As a property investor, I was anxious about finding a replacement for my previous builder of many years, but GLB has filled those shoes seamlessly. His prices are very competitive, the work is outstanding, and most importantly, he delivered exactly what was promised on time. Highly recommended.

Shabs J.Google review

Geraldo and his team recently completed a full fit-out of our flat that we purchased in terrible condition. It included a complex relocation of the kitchen and boiler to create an additional bedroom and create an open plan kitchen, diner and lounge. From start to finish, Geraldo was a true professional. His attention to detail is second to none—not just in the construction, but in the administration as well. Without even being asked, he provided a complete handover pack including Building Regs, Gas Safe, and Electrical certificates, along with all appliance warranties. We used our local council for Buildings Regulations and he deftly managed all their requirements, easing the worry for us tremendously.

He was incredibly helpful during the pre-construction phase, providing all the necessary documentation to satisfy our freeholder’s requirements. Throughout the build, he suggested several clever ways to save on costs while actually improving the design and functionality of the space. He is a 'communication is key' professional who always answers his phone and solves problems with total patience and clarity. Even after the project was finished, he went out of his way to help with a minor follow-up issue. I wouldn’t dream of using anyone else for future work.

Hus H.Google review

The team did an excellent job on my refurbishment! This included installing engineered wood flooring throughout, new kitchen, new bathrooms (2+1 separate WC), underfloor heating, plastering plus many more jobs. They kept me updated of progress all along the way especially when I was away and minimised the pain of doing work while also living in the house. My first point of call if I ever needed something done.

Feyi O.Google review

GLB has worked with us for over two years, firstly doing renovations and then little “bits & bobs”. Outstanding quality, service and staying with you when others “ride off into the sunset”. Geraldo and the team come with highest recommendations and they are a true delight to work with….a firm you can trust for the long haul…no hesitations in adding a five star recommendation….and I am difficult.

James G.Google review

Geraldo built an extension to my flat, a new kitch and toilet/shower room. I am very pleased with it. He and his team were expert, informed, attentive to detail, good timekeepers - and friendly. I recommend them

John C.Google review

GLB Construction was great to work with from start to finish. The team was professional, easy to communicate with, and paid close attention to the details. The work was done on time and turned out exactly as expected. Overall it was a smooth experience and I’d definitely recommend GLB Construction to anyone looking for reliable construction work.

ArdianGoogle review

Geraldo has done various jobs for us over the years. Transforming an entire floor including 4 bedrooms and 3 bathrooms. Pergola, fencing and also roof works. Extremely good skills and very friendly. Open to suggestions and ideas. Would highly recommend.

Z. H.Google review

We had work done a while back so we can say that Geraldo’s work has stood the test of time ..no cheap materials no shortcuts…if something isnt a good idea structurally.. he will let you know…he has a very good understanding of the client’s vision..and does not shy away from starting all over if something doesnt feel right..great work

Mehreen A.Google review

"Top-notch service! I hired them for a parquet installation and I couldn't be happier. The guy running the business is young, energetic, and clearly a master of his craft. It’s rare to find such high-quality woodwork combined with great communication and fair, competitive prices in London. If you need a specialist for your house renovation, look no further!"

Blerina M.Google review

We were very pleased with Gerald's work. He displayed high levels of competence, knowledge and experience. He was reliable, friendly, and helpful. Very happy to recommend.

richdormGoogle review

Geraldo is dutiful and reliable. He had done good jobs to my two properties. I highly recommend to anyone who requires.

Shirley H.Google review
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