Chartered Civil Engineer-led builders

Building renovations and extensions across Manchester and Cheshire, engineered properly

Everstone is led by Dr Omid Khalaj, a Chartered Civil Engineer (CEng MICE) and Registered Ground Engineering Professional. Omid explains your project, the challenges and the possible solutions in plain English, then manages everything from design to handover.

  • BEng (Hons), MSc, PhD
  • Chartered Civil Engineer (CEng MICE)
  • Registered Ground Engineering Professional (RoGEP)
  • One contractor, design to handover
  • Clear, itemised pricing

Book your free consultation

Answer a few quick questions and book a free call or site visit with Omid.

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What do you need?
We cover South Manchester and Cheshire.
When would you like to start?
How would you like to meet?
Morning or afternoon?

Your details

Fully insured Chartered Engineer-led Free estimates
Before and after

See the transformation

Choose a type of project, then use the arrows to see more examples. Drag the handle on any photo to compare before and after.

Before: Front extension and driveway
After: Front extension and driveway
BeforeAfter

Client experiences

What Our Clients Say

Homeowners we have worked with, describing their experience in their own words.

Read all client reviews
5.0Average rating: 5.0 out of 5
20+years of Omid's engineering experience
CEngChartered Civil Engineer, MICE
RoGEPRegistered Ground Engineering Professional

Academic qualifications BEng (Hons), MSc, PhD

Really pleased with the work Omid and his team did for us. We had a rear extension built as well as quite a lot of refurbishment work inside the house, including new electrics and plumbing.

The team were friendly, reliable and easy to deal with. Omid was always available if we had a question or wanted to change something and kept us updated as the job went along. Everything was finished to a good standard and we're very happy with how the house has turned out.

Would happily recommend Everstone and would use them again.

James Walker
15 September 2026

We appointed Everstone Build & Development to carry out a double-storey wraparound extension together with extensive internal alterations to completely transform our home. The project included creating a large open-plan kitchen, dining and living area on the ground floor, adding a convenient WC under the stairs, and creating a spacious new bedroom with an en-suite as well as a new family bathroom on the first floor.

From our very first meeting, Omid stood out because of his technical knowledge and honest advice. He didn't simply build what was shown on the drawings; he took the time to explain different options, suggested practical improvements, and came up with ideas that made better use of the available space without unnecessarily increasing the cost. It genuinely felt as though he wanted the best outcome for our family rather than simply completing another building project.

Communication throughout the build was excellent. We always knew what was happening, any questions were answered quickly, and any changes we wanted were discussed openly with clear pricing before any work was carried out. The team were polite, hardworking, organised, and kept the site as tidy as possible throughout the project.

Looking back, one of the things we appreciate most is how Omid dealt with rising material costs during our project. Prices increased dramatically while the work was underway, yet he honoured his original quotation without asking us for extra money or using it as a reason to increase the cost. We only realised afterwards that he had absorbed those additional expenses himself. That level of honesty and commitment is rare nowadays and gave us complete confidence that we had chosen the right builder.

The quality of workmanship has been exceptional throughout. The structural alterations, steel installation, brickwork, roofing, plastering and finishing were all completed to an outstanding standard, with great attention to detail at every stage. The transformation has exceeded our expectations. The open-plan living space has completely changed the way we use our home, while the additional bedroom, en-suite and family bathroom have made it far more practical for our growing family.

Finding a builder you can genuinely trust isn't easy, but that's exactly what we found with Everstone. Omid combines engineering knowledge with outstanding craftsmanship, excellent project management, practical problem-solving and genuine integrity. He clearly takes pride in his work and treats every project as if it were his own home.

We couldn't be happier with the finished result and wouldn't hesitate to recommend Everstone Build & Development to anyone considering an extension, refurbishment or structural alteration.

Lucy & James Wilson
29 July 2026

We chose Everstone Build & Development to create a new family bathroom as part of our house refurbishment, and we're so pleased we did. From the outset, Omid offered practical design advice that improved the layout and helped us make the best use of the space. He also suggested that we purchase the bathroom suite and tiles ourselves using his Trade discount, saving us a considerable amount of money. The quality of the workmanship was outstanding, communication was excellent throughout, and the team were always reliable, tidy and flexible whenever we requested small changes. Even better, the project was completed ahead of schedule, with no unexpected costs. We wouldn't hesitate to recommend Omid and Everstone Build & Development to anyone looking for a trustworthy, professional builder.

Claire Thompson
4 July 2026

We appointed Everstone Build & Development for a double-storey extension, full loft conversion, and extensive internal alterations.

What stood out most was how Omid and his team handled the project as it evolved. We made several changes to the original design during construction, but everything was discussed clearly, costs were explained upfront, and any additional works were priced fairly and transparently. We always felt in control and never encountered any unexpected surprises.

One thing I particularly appreciated was that Omid seemed to approach the project as if he were building his own home. He regularly suggested alternatives and improvements that we had not considered, explaining the pros and cons of each option and allowing us to make informed decisions. At no point did we feel pressured into spending more money; instead, we felt he genuinely wanted the best outcome for us and the property.

The quality of workmanship was excellent, communication was consistent, and the project progressed much faster than we expected despite the various changes made along the way. It was clear that the team genuinely cared about delivering a high-quality result.

We are extremely pleased with the finished project and would happily recommend Everstone Build & Development to anyone considering an extension, loft conversion, internal alteration or any major renovation.

Mark Richardson
15 June 2026

We had a wraparound single-storey extension and internal refurbishment done in Cheadle by Everstone, and honestly we’re really pleased with how everything turned out.

From the start, Omid was easy to deal with and explained everything clearly. The work involved quite a lot — knocking through, new layout, and a full refurb — but it all ran smoothly and felt well organised throughout.

The finish is great, especially in the main living space, and the house feels completely transformed. Any small issues were picked up quickly and sorted without hassle. Would definitely recommend.

Sophie Bennett, Cheadle
29 March 2026

Outstanding Service – Highly Recommended

I highly recommend Everstone Build & Development. They carried out a full refurbishment of my flat, and the results exceeded my expectations in every way.

The project included a complete demolition and rebuild of the bathroom and toilet from scratch, with all new plumbing fully embedded into the walls, high-quality tiling, and a modern, flawless finish. They also designed and fitted a brand-new kitchen, which was completed to an exceptional standard.

One of the major upgrades was replacing the traditional radiators with underfloor heating, including smart zoned controls. This completely transformed the comfort of the flat. Alongside this, they installed new flooring throughout, repainted the entire property, and even adjusted door heights to ensure everything was finished perfectly.

Omid and his team were professional, friendly, and fully responsible from start to finish. The work was completed earlier than agreed, and the site was always kept clean and tidy. They were extremely flexible and welcoming when I requested changes, and every adjustment was handled without any hassle.

Cost transparency was excellent, with clear pricing and flexible payment arrangements, which gave me complete confidence throughout the project.

I am extremely satisfied with the outcome. The quality of workmanship, attention to detail, and level of customer care were outstanding. I will definitely use Everstone again in the future and would fully recommend them to anyone looking for reliable, high-quality builders.

James Whitaker
1 February 2026
Everstone Build & Development

Extensions, conversions and renovations. Engineered to last, built to live in.

Everstone Build & Development Ltd is a Chartered Civil Engineer-led building company serving South Manchester and Cheshire. We design and build house extensions, loft and garage conversions, renovations and structural works, and we manage the complete project from the earliest design stages to final handover. Every project is led personally by Dr Omid Khalaj, CEng MICE, RoGEP.

Dr Omid Khalaj talking a client through the plans for her extension
Omid talking a client through their plans
What makes Everstone different

What makes Everstone different

Engineering expertise from day one. Your project is led by a Chartered Civil Engineer from the first conversation to final handover.

Chartered Civil Engineer-led

Omid is a Chartered Civil Engineer (CEng MICE) and Registered Ground Engineering Professional (RoGEP). Structure, foundations and ground conditions are considered from the outset, at the very first visit.

Practical technical advice

You get an honest, practical view of what is possible, the challenges your project may face and the solutions available, before you commit to drawings.

Clear communication

Omid explains your project, the options and the costs in plain English, and confirms the details in writing so you can make decisions with confidence.

One contractor, design to handover

We coordinate the design, building work, trades, installations and finishes, so you have one contractor and one point of contact throughout, without finding and managing separate contractors.

Clear pricing for an agreed scope

Your quotation sets out the included work and price. The price remains fixed for the agreed scope, with any changes to the work and costs discussed and agreed before proceeding.

Professional project management

A realistic written programme, regular updates and personal involvement from the director, so you always know what is happening and what comes next.

  • Domestic work
  • Commercial work
  • Free consultation and estimates
  • Workmanship warranty provided
  • Insurance work undertaken
How it works

How it works

  1. Step 1

    Feasibility check

    Speak to Omid, get an honest view

    Tell us about your project, then talk it through with Omid. We tell you what is possible and give you a realistic budget range.

  2. Step 2

    Design and quote

    Survey, design, itemised quote

    We visit, measure up and coordinate the design and structure, then give you a clear, itemised quotation.

  3. Step 3

    Build and handover

    Managed build, walk-through, sign-off

    We build to an agreed programme with staged payments, keep you updated throughout and hand over with a walk-through and sign-off.

Dr Omid Khalaj, Founder and Director and Chartered Civil Engineer, Everstone Build & DevelopmentDr Omid Khalaj, Founder and Director
Meet Omid

Dr Omid KhalajFounder and Director

BEng (Hons), MSc, PhD, CEng, MICE, RoGEP

A Chartered Civil Engineer (CEng MICE) and Registered Ground Engineering Professional (RoGEP), personally involved in every project.

Omid founded Everstone Build & Development after more than two decades in construction, civil engineering, research and consultancy. He holds a BEng (Hons), MSc and PhD in Civil Engineering and a PhD in Mechanical Engineering.

That background means practical technical advice and thoughtful solutions. When Omid looks at your home he sees the loads, the foundations and the ground as well as the finish, so he can tell you early what will work, what will not, and why.

You deal with Omid directly. He visits, explains your project, its challenges and the possible solutions, and stays involved from the first conversation to handover.

"I want every client to know exactly what they are getting, why it will stand up, and what it will cost. That is what an engineer brings to building."

Omid Khalaj signature

Omid Khalaj, Founder and Director

Read Omid's full biography
Our standards

Three things we never compromise on

Attention to detail

Every element crafted with care.

Premium materials

Built to last with quality supplies.

Skilled professionals

A dedicated team for every aspect of your project.

Areas we cover

Areas we cover

We primarily serve South Manchester and Cheshire, and welcome enquiries for suitable projects further afield.

See all areas

Map of the area we cover

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Partners and accreditations

FAQs

Common questions

Do I need planning permission for an extension?

Many single-storey rear extensions fall under permitted development, while double-storey extensions, wraparound extensions and some loft conversions often need planning permission or a lawful development certificate. Everstone tells you where your project sits during the free feasibility check.

How much does an extension cost in South Manchester?

As a guide, single-storey extensions in South Manchester and Cheshire typically start from around £2,000 to £2,800 per square metre plus VAT for the build, before kitchens and finishes, and loft conversions typically cost around £25,000 to £35,000 plus VAT for a rooflight conversion and £40,000 to £60,000 plus VAT for a dormer. Everstone gives a realistic range before any drawings are done.

Do you do the drawings and structural calculations?

Yes. Everstone can work with your architect or arrange the drawings, and structural calculations are handled by the company's director, Dr Omid Khalaj, a Chartered Civil Engineer (CEng MICE).

How long will my project take?

A typical single-storey extension takes around 10 to 16 weeks on site and a loft conversion takes around 6 to 12 weeks. Everstone agrees a written programme with you before work starts.

Are you insured?

Yes. Everstone Build & Development Ltd is fully insured, with public liability and employer's liability insurance, and the company is led by a director with over 20 years of experience in construction and civil engineering.

Is the feasibility check really free?

Yes. The feasibility check is a call with Omid and, where the project is a good fit, a site visit and itemised quotation, with no charge and no obligation.

Free feasibility check

Ready to find out what your home could become?

Talk your project through with a Chartered Civil Engineer, and get an honest view of what is possible and a realistic budget range, before you spend money on drawings.

Before you go...

Get free planning advice with your project

Book a free consultation with Dr Omid Khalaj, Chartered Civil Engineer, and we will include planning and structural advice at no charge when you place your job with Everstone.