Construction & Renovation Specialists in Orpington, Bromley, South East London & Kent

Q: How do I get a quote?

Contact us by phone or through the contact form on this website for a free, no-obligation quote.

C Nagy Construction provides high-quality building and renovation services across Orpington, Bromley, and the surrounding London and Kent areas. We specialise in house extensions, full renovations, new builds, kitchen fitting, tiling, roofing, and chimney breast removals, plus commercial refurbishment for offices, restaurants, schools, and care homes — all carried out in full accordance with current building regulations.

Charlie Nagy is currently studying towards a civil engineering qualification, bringing added technical insight to every project. We work with a trusted network of structural engineers and architects, offering a complete, coordinated service from initial design through to finished build.

Built on years of hands-on experience and a strong reputation from client referrals, we take pride in reliable workmanship, clear communication, and lasting results.

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What We Do

Extensions

Single and double-storey, side-return, rear and wraparound extensions

Loft Conversions & Garage Conversions

Transform unused space into a fully functional room, tailored to your home.

Commercial Refurbishment

Offices, restaurants, schools, and care homes

New Builds

Full builds from foundation to completion

Kitchen & Bathroom Renovation

Full strip-out and rebuild

Full House Renovations

Complete refurbishments and refits

see the full services list

Areas We Cover

We’re based in Orpington and cover Bromley, Chislehurst, Petts Wood, Beckenham, West Wickham, Biggin Hill, and the surrounding London boroughs and Kent districts — including Lewisham, Greenwich, Bexley, Croydon, Sevenoaks, and Dartford. Happy to travel further across London and the South East for the right project.

A Complete Design & Build Service

Initial Consultation & Site Visit

We discuss your project and assess the property in person.

Design & Drawings

Working with an architect where required to bring your ideas to life.

Structural Calculations & Building Regulations Approval

Coordinated with a structural engineer to keep everything compliant.

Building Notice

Submitted where applicable, so your project starts on the right footing.

Construction

The build phase, managed start to finish with clear communication throughout.

Sign-Off & Completion Certificate

Full Building Regulations compliance confirmed, so you can move in with peace of mind.

Why Choose C Nagy Construction

Building Regulations Compliant

Every structural job done properly and to code

Complete Service

Coordinated design, engineering, and build under one roof

Local and trusted

Built on referrals and word-of-mouth reputation

Our Work

What Our Clients Say

      EXCELLENT  
   Based on 24 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   layla 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great service and work completed! Charlie was very communicative, efficient and very reasonable pricing! Would highly recommend and will definitely use again in the future.
  
 
      Posted on Google  
   
   David Borsi 
 
 
 
 Trustindex verifies that the original source of the review is Google. Charlie was really professional and delivered the project in time. Great service and communication. Highly recommended
  
 
      Posted on Google  
   
   George Sivapatham 
 
 
 
 Trustindex verifies that the original source of the review is Google. Charlie is good person and he have done some internal Buliding work for me and had good knowledge about the trade I recommend him as good Bulider
  
 
      Posted on Google  
   
   Gianina Soare 
 
 
 
 Trustindex verifies that the original source of the review is Google. Really happy with the work. Everything was done professionally, on time and with great attention to detail. Good communication throughout and no hassle at all. Would definitely recommend for any building or renovation work.
  
 
      Posted on Google  
   
   Ultimate Stanza 
 
 
 
 Trustindex verifies that the original source of the review is Google. Such a great job done. Will recommend each and everyone to try them. Unbelievable price
  
 
      Posted on Google  
   
   Funmi Shomotun 
 
 
 
 Trustindex verifies that the original source of the review is Google. ⭐⭐⭐⭐⭐ I highly recommend Navy Construction. They have worked as a contractor on several of my projects, and I have always found them to be reliable, professional, hardworking and trustworthy. They take pride in their work and are committed to delivering a good standard. What I particularly appreciate is their compassionate and understanding approach, as well as their willingness to go the extra mile when needed. From my experience working with them across different projects, they have proven to be dependable and someone I can confidently recommend. It has been a pleasure working with Navy Construction, and I look forward to working with them on future projects.
  
 
      Posted on Google  
   
   Florence Koffi 
 
 
 
 Trustindex verifies that the original source of the review is Google. recommend this company for all your projects; they are excellent.
  
 
      Posted on Google  
   
   marye 
 
 
 
 Trustindex verifies that the original source of the review is Google. offers reliable service at reasonable prices. Professional and easy to work with. Highly recommended!
  
 
      Posted on Google  
   
   Uaccount Account 
 
 
 
 Trustindex verifies that the original source of the review is Google. A true team of professionals! The guys at C Nagy Construction did an amazing job. Communication was smooth, and they were very reliable, punctual, and serious about their work. The pricing was fair and very reasonable for the high quality provided. I will definitely collaborate with them again in the future!"
  
 
      Posted on Google  
   
   Amara 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great guy!!! Would highly recommend
  
 
  
  
 
     Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

Frequently Asked Questions

What services does C Nagy Construction offer?

We offer house extensions, full house renovations, new builds, kitchen and bathroom renovation, loft conversions, roofing, tiling, plastering, and commercial refurbishment for offices, restaurants, schools, and care homes.

What information do you need to provide a quote?

We’ll typically need the property address and any existing drawings or structural calculations, if you have them. We also offer a free site visit to discuss your project in detail before providing a full written quotation.

How do I get a quote?

How much does a house extension cost in Bromley or Orpington?

Costs vary depending on size, specification, and structural complexity. Get in touch for a free, no-obligation quote based on your specific project.

How long does an extension or renovation typically take?

Timeframes vary depending on the size and complexity of the project. Book a free quote and site visit and we’ll give you an accurate timeframe based on your specific requirements.

Can I use my own architect or structural engineer?

Yes. If you already have drawings or calculations from your own architect or structural engineer, we’re happy to work directly from those. If not, we can coordinate a trusted network of specialists on your behalf as part of our design and build service.

Do you work with architects and structural engineers?

Yes, we coordinate a trusted network of architects and structural engineers as part of a complete design and build service, so clients don’t need to source and manage separate specialists themselves.

Is structural work carried out to Building Regulations?

Yes, all structural work — including extensions, structural alterations, and chimney breast removals — is carried out in full accordance with current Building Regulations, with structural engineers and Building Control involved where required.

Does C Nagy Construction do commercial refurbishment?

Yes, alongside residential work, we carry out commercial and institutional refurbishment including offices, restaurants, schools, and care homes.

What areas do you cover?

We’re based in Orpington and cover Bromley, Chislehurst, Petts Wood, Beckenham, West Wickham, and Biggin Hill, plus surrounding areas including Lewisham, Greenwich, Bexley, Croydon, Sevenoaks, and Dartford. Happy to travel further across London and the South East for the right project — get in touch to check if we cover your area.