SIPs home under construction, wrapped and scaffolded, on its way to weathertight
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Shell Build · Most popular

Weathertight.
Then it's yours.

Our core package. Engineering, foundations, structure, roof, windows and cladding, delivered by one team to a sealed, insulated shell. The hard part done. You finish inside your way.

Proven on real homes
3 weeksFoundations and SIPs structure, proven on a 200 m² home.
10 daysTimber frame installed on two Woodlands homes.
1.3Air permeability on a recent home, where Building Regulations allow 8.
From £75kTypical starting point for a Shell Build. Your figure comes from your drawings.
Shell Build: engineering, foundations, structure, roof, windows and cladding brought together around one home
What's included

More than a kit

The manufacturer's system is one part. Shell Build is everything that turns it into a weathertight building, delivered by one team to one programme.

  • Structural engineering
  • Insulated raft foundation
  • SIPs or timber frame structure
  • Installation by our own teams
  • Cranes, lifting and site logistics
  • Roof
  • Windows
  • Cladding and airtightness
  • Principal Contractor included

Optional: demolition, MVHR design and scaffolding. Building control and Building Regulations drawings on request, as most clients' architects provide these.

Buying the kit doesn’t guarantee the benefits. We partner with leading manufacturers and cover what they wouldn’t normally provide: construction, construction management, site surveys and reports, and on-site construction activities.
Who does what

Three parts. One clear line between them.

Manufacturers make exceptional systems. We build with them. You choose how the inside is finished.

The manufacturer

Makes the system

SIPs or timber frame panels, engineered and made in the factory to fit your design.

Dynamic Build UK

Builds the shell

  • Digital design and engineering
  • Foundations
  • Structure, roof, windows and cladding
  • Airtightness, checked as it's built
  • Principal Contractor, with one senior contact
You

Finish inside your way

  • Your own trades, or ones you trust
  • Your kitchen, bathrooms and finishes
  • Your pace and your budget
Extending, not building new? Shell Build is our extension package too, for single and two-storey extensions from 50 m².Extensions
Weathertight looks like this

What you get at handover

A sealed, insulated shell, ready for first fix. Real homes, at the stage we hand them over.

Completed SIPs shell with a solar roof, wrapped walls and windows fittedRoof, windows and solar on
Inside a SIPs roof: exposed structure and roof windows, sealed and insulatedInside, ready for first fix
Cladding and roofing going on together on a hybrid ICF and SIPs homeRoof and cladding running together
Shell Build projects we've worked on, and live projects

Homes and extensions, built to weathertight

All projects →
“We’d almost given up on finding a builder for our SIPs home. The manufacturer introduced us to Dynamic Build, who delivered the frame and the on-site construction. Amazing results.”
Self-builderSIPs · Introduced by the manufacturer
Programme

Weeks, not months, on site.

The same recent project, two programmes. Fewer weeks on site means fewer weeks paying for scaffold, labour, finance and site costs.

Traditional programme
10 weeks
Dynamic NextGen System
3 weeks

Speed comes from the planning. Your home is digitally developed first, then manufacture runs while the foundations go in, so the structure arrives to a site that's ready for it.

After handover

Weathertight. Then what?

You're not left with a shell and no plan. Your trades walk into a dry, insulated, airtight building, with everything they need to know about how it was built.

Want us to take it all the way?

Complete Build adds internal fit-out and decoration, renewables and smart controls, through to handover. Complete Build

What you get from us

  • A weathertight, insulated shell
  • Fabric designed for EPC A or B
  • Technical build guides for your trades
  • Handover pack and product guarantees

What your trades do next

  • First fix electrics and plumbing
  • Heating and ventilation
  • Plastering and screeds
  • Kitchen, bathrooms and finishes
What you're paying us for

What we take responsibility for

It starts with digital design and engineering. Everything after it runs to a plan that's already been proven on screen. Built for the difficult ones too: tight sites, access complications, multiple party walls, challenging designs, high performance targets and fixed deadlines. Our skills: design for manufacture and assembly, SIPs and timber frame installation, integration, project management, cost management, health and safety, manufacturing management, value engineering and customer service.

  • Digital design & engineeringWe digitally optimise manufacturing and construction before anything is ordered: engineering, buildability and budget worked through on screen.
  • Principal ContractorWe hold the legal responsibility for the site and run it, managing our own installers and specialist trades who've built this way before.
  • ProcurementEvery system bought to fit the others.
  • Quality controlOn site, checking insulation, airtightness and junctions as they're built.
  • SchedulingManufacture runs while the foundations go in, so nothing waits on site.
  • Safety and handoverPrincipal Contractor safety duties on site, and a handover pack with product guarantees and how your home was built.
Built with leading manufacturers

Shell Build brings six manufactured systems together

Each system can involve several companies in the supply chain. We bring them all together through one company to simplify, accelerate and de-risk delivery. Complete Build adds three more.

Do you manufacture?

No. It takes multiple manufactured systems to build a home. We partner with leading manufacturers and focus on how those systems fit together, delivering low energy homes. SIPs and timber frame are our specialism. Where a project calls for it, and it brings clear benefits in delivery and in living in the home, we’ve also built with ICF and volumetric modular.

Shell Build

  1. Foundation systems
  2. SIPs or timber frame
  3. Engineered timberGlulam and LVL
  4. Roofing systems
  5. Cladding systems
  6. Windows and doors

Complete Build adds

  1. MVHR and ventilation
  2. Low energy heating
  3. Solar and battery
Compare

Shell Build or Complete Build?

Shell BuildComplete Build
We hand overA weathertight, insulated shell, with fabric designed for EPC A or BA finished home designed to EPC A or B
FoundationsIncludedIncluded
Structure, roof, claddingIncludedIncluded
Services, MVHR, heat pump, solarYour team, or MVHR design as an optionIncluded
Finishes and fit-outYour teamIncluded
Best forClients with their own trades, or who want control of the finishClients who want one team to the keys
Finance

Built for the way self-build money works

Self-build mortgages release funds in stages, and weathertight is one of the big ones. Shell Build takes you there under one contract, with a confirmed price your lender can see before you start.

Mortgage and warranty ready. Built to be accepted by mainstream lenders and structural warranty providers. Need a broker? We can introduce you to a mortgage specialist.

Instant price guide

What might your Shell Build cost?

What are you building?
How far do you want us to go?
180 m²
50 m²450 m²
Your price guide

Where shall we show your price guide?

Your typical cost range appears here straight away.

A typical range for projects like yours, before we've seen your drawings or site. Excludes VAT, professional fees and Principal Designer. Your 5-day estimate is priced from your own drawings.

How it works

Your route to weathertight

  1. 01Day 0Send your drawings

    Planning drawings, with your application submitted or approved. No drawings yet? Start with the instant price guide.

  2. 025 working daysYour estimate

    Priced from your drawings.

  3. 03About 6 weeksWe digitally develop your home

    Engineering, buildability and budget worked through on screen, and manufacture and construction optimised, before anything is ordered.

  4. 04Before we startYour confirmed cost

    An easy-to-read breakdown, construction and professional fees shown separately, with a confirmed price and date: cost, programme and specification certainty before we start on site.

  5. 05Weeks, not monthsWe build and project manage

    Manufacture runs while foundations go in. One team runs the site, with one point of contact for you.

  6. 06Agreed dateYour shell, handed over

    Weathertight and insulated, with technical build guides so your trades can start straight away.

Questions

Shell Build questions

Can I use my own trades inside?

Yes. That's what Shell Build is for. We hand over a weathertight, insulated shell and technical build guides, and your trades take it from first fix to finish.

Are windows and external doors included?

Windows are included in Shell Build. External doors are confirmed in your estimate, as they depend on your design and spec.

My drawings are for a traditional build. Is that a problem?

No. Planning drawings are all we need. We digitally develop your home for SIPs or timber frame, working through engineering, buildability and budget before anything is ordered.

Who is Principal Designer?

We're Principal Contractor on every Shell Build. Principal Designer is a separate role, usually held by your architect. If you don't have one, we'll show you how it's covered in your estimate.

Can I move up to Complete Build later?

Yes. You can decide as your design develops. Complete Build adds internal fit-out and decoration, renewables and smart controls through to handover.

Will my lender and warranty provider accept it?

Our homes are built to be accepted by mainstream lenders and structural warranty providers. Tell us who you're using and we'll work to their requirements.

Start here

Send us your drawings.
Get your figure in 5 working days.

Planning drawings are all we need, with your application submitted or approved. Free, no obligation.

Call0121 724 0099
Emailinfo@dynamicbuilduk.com
Birmingham officeThe Colmore Building, 20 Colmore Circus Queensway, Birmingham B4 6AT
London officeLondon