Welcome To Optimal Developments Ltd

Builders in King's Lynn for New Builds, Extensions and Renovations

New builds, extensions, renovations and structural work across King's Lynn, Wisbech, Downham Market and the wider Fens. One team, start to finish.

Idyllic country house with garden on sunny day.
Modern brick house with large windows and paved driveway.

36 years on the tools

12-month snagging guarantee

CHAS accredited

You deal with Dan direct

Kitchen extension by Optimal Developments builders in King's Lynn, navy shaker units and herringbone flooring

Why Choosing the Right Builder Matters

Finding a builder you can trust is the hard part, isn't it. You may have been let down before. Someone who didn't turn up, or left the job half done. That's not how we work. Dan's been on the tools 36 years and deals with every customer himself, from the first visit right through to handover. No call centre, no project manager you've never met. Just a builder who turns up when he says he will and does the job properly.

Why People Give Us a Call

36 years on the tools

Dan started bricklaying at 13 and spent years running sites for Kier before going out on his own. That experience shows on every job we take on.

12-month snagging guarantee

Every job carries a 12-month snag. If something isn’t right, we come back and sort it. We’ve never left a client unhappy.

You deal with Dan direct

From the first quote to the final handover, you’re dealing with Dan and the lads. One team for the whole job, no separate trades to chase.

Stage payments on bigger jobs

On larger builds you pay in stages, each one signed off by building control. You pay for completed work, not promises.

What Our Customers Say

A couple of the people we've built for, in their own words.

  • I highly recommend these guys for a good-quality job.

    Optimal has made us an amazing porcelain patio and a raised garden with sleepers. I highly recommend these guys for a good-quality job.

  • They have built a beautiful home for us.

    Dan and his team were such a nice happy bunch. A pleasure to talk to and liaise with. They have built a beautiful home for us. With an amazing space outside. We will use Dan for any future work because it’s not that often you find a builder that you can trust.

  • What We Do Best

    New builds in King's Lynn and across Norfolk

    Building a new home is the biggest job most people ever take on. We handle the lot, from the groundworks and foundations right through to the finish. Single houses, self-builds, or multi-plot sites for investors. Dan spent years running large projects as a site manager, so a full new build is well within our patch. We sort the structural side, the building control sign-off and the drainage before the lads break ground. On bigger builds you pay in stages, signed off as each one’s done.

    Home extensions in King's Lynn

    A good extension changes how your whole house lives, and it’s a lot less hassle than selling up and moving. We do single and double-storey extensions, rear and side, plus the structural openings to tie the new space into the old. Ground conditions matter round here. That Fenland soil can move, so we get the foundations and drainage right from day one. Building control are in from the start and stay in through every stage.

    More on our extensions →

    Everything Else We Take On

    Home Renovation

    Sometimes it isn’t more space you need, it’s the house brought back to life. We take tired properties right back and rebuild them to last. Full room strip-outs and replastering, new kitchens and bathrooms, knocking through for open-plan living. On older places we sort the hidden problems first, the damp, the dipped floors, the blown plaster, before the finishing lads come in. No point tiling a floor that isn’t solid underneath.

    More on home renovation →

    Structural Work

    Knocking a wall through, opening up the ground floor, or tying an extension into the existing house. It all needs the structural side doing properly. We handle RSJ and steel installs, load-bearing wall removal and the building control sign-off that goes with it. This is where Dan’s site-management background earns its keep.

    Concrete Services

    The bit nobody sees but everything sits on. Foundations, structural concrete and finished slabs, deep excavation, drainage and tank installation. We do the civils on our own builds and take on groundwork contracts for other developers too. Klargester and oil-separator installs are a bit of a specialism.

    More on concrete services →

    Driveways and Paving

    A new driveway or patio is the quickest way to smarten up the front or back of a house. We lay block paving, porcelain and natural stone, and get the sub-base and drainage right so it stays flat and doesn’t sink. Dan does the specialist stuff too, radius walls, stonework and porcelain surrounds.

    More on driveways and paving →

    Domestic, commercial and civils, all under one roof. From the footings through to the plastering, kitchens, bathrooms and paving, you’re not coordinating separate trades or getting the finger-point when something goes wrong. Dan runs every relationship himself, with Lee supervising on site and the lads getting the work done. CHAS accredited, 36 years of experience behind us, and a 12-month snag on everything we build.

    About Optimal Developments

    At Optimal Developments, we're more than builders; we're partners in bringing your vision to life. With a quarter-century of experience in both commercial and domestic projects, our team is dedicated to delivering unparalleled quality and service, no matter the project size. From innovative new builds to transformative remodeling and comprehensive civil engineering, we ensure every build is a testament to our commitment to excellence.
    Spacious modern attic bedroom with blue bed.
    Modern floating staircase with glass balustrade.

    Areas We Cover

    We’re based in Tilney St Lawrence, just outside King’s Lynn, and cover King’s Lynn, Wisbech, Downham Market, Burnham Market and the villages in between, plus the wider Fens within about an hour. Tell us where the job is and we’ll let you know straight away if it’s in our patch.

    King’s Lynn
    Wisbech
    Downham Market
    Swaffham
    Hunstanton
    Dereham
    Ely
    Burnham Market

    Find Us on Google

    Frequently Asked Questions

    Yes. We’re based just outside King’s Lynn in Tilney St Lawrence and cover King’s Lynn, Wisbech, Downham Market, Burnham Market and the villages around them, plus the wider Fens within about an hour. Tell us where the job is and we’ll let you know straight away if it’s in our patch.

     It depends on the size, the spec and the ground conditions, so we won’t give you a firm price without seeing the plans. What we can do is come out, have a look and give you an honest steer on what your project’s likely to involve. On bigger jobs we work to stage payments, so you’re only ever paying for work that’s done and signed off.

    Yes, on every job that needs it. We sort the structural calculations, the steels and the building control sign-off as part of the work, so you’re not left chasing paperwork or separate trades.

    Every job carries our 12-month snagging guarantee. If anything isn’t right in that first year, we come back and sort it. It’s how we’ve built a business on repeat customers and referrals.

    Yes. Dan spent years running large projects as a site manager before going solo, so full new builds are well within our range, from a single self-build to multi-plot sites for investors and developers.

    We’re CHAS accredited, and every job that needs it is signed off by building control at each stage.