Civil & Structural Engineering
Structural design and analysis from survey to execution, with support through approvals and construction.
Read more →Engineering & design consultancy · London
Where engineering meets design.
Castle X brings civil and structural engineering, surveying, industrial design, interiors and shop fitting under one roof. One team takes your project from the first measurement to the finished space.
castleX Designer·Plan your shop in 3D, 14 days free→
DesignEngineerBuildInnovate
CASTLE X
Design | Engineer | Build | Innovate
300+Design projects delivered
100+Analysis projects delivered
100%On-time delivery
15+Years of experience
NEWcastleX Designer · Online tool
Design your shop in 3D, yourself.
Draw the floor plan in 2D, walk through it in 3D with shoppers and merchandise, then export an itemised quote and bill of materials from real supplier price lists. Built by Castle X for shop owners, franchises and fitters.
- 2D plan → 3D walkthroughShelving, counters, fridges, fitting rooms and lighting, placed in minutes.
- Customer-flow filmsSee how shoppers move through the layout before you build it.
- Quotes & exportsItemised quote, bill of materials and drawings your fitters can use.
No card needed. After the trial: £49 per month or £490 per year, unlimited projects, cancel any time. 14-day money-back guarantee.
Featured service · Retail
Shop fitting designed to sell.
We design retail interiors from the floor plan to the last fixture: layouts that guide customers through the store, displays that show stock at its best, and technical drawings your joiners and fitters can build from without guesswork.
From empty unit to opening day.
Every fit-out starts with how your customers move. We plan the route, place the fixtures that sell, and engineer every unit so it can be built, delivered and installed on programme.
- Store layout & customer flowZoning, sightlines and a route that takes shoppers past your key ranges.
- Fixtures & joinery designShelving, gondolas, counters, display units and fitting rooms.
- 3D visualisationWalk through the shop and approve it before anything is built.
- Lighting & finishes conceptAccent lighting on displays and a material palette that suits your brand.
- Fabrication drawingsDimensioned shop drawings and cutting lists ready for manufacture.
- Fit-out coordinationSupport on site through installation and handover.
- Brief & surveyWe measure the unit and agree goals, budget and opening date.
- Concept & 3DLayout options and 3D views you can review and refine.
- Technical designDetailed drawings for every fixture, service and finish.
- Build & handoverCoordination with makers and fitters through to opening.
Services
Eight disciplines. One team.
Our mark has two sides, and so does our work. Engineers survey, analyse and build on one side; designers shape parts, products and spaces on the other. Your project draws on both.
Engineer · Build
Surveying & Geospatial
Topographic and industrial surveys, UAV mapping and LiDAR with centimetre-level accuracy.
Read more →Construction
Site coordination and construction support, so what gets built matches what was engineered.
Data Analytics & Insights
Survey and project data processed into clear reports for engineers, planners and decision-makers.
Design · Innovate
Industrial Part Design
Mechanical parts from rough concept to production-ready 2D and 3D drawings.
Read more →Interior Architecture
Interior layouts, finishes and joinery for retail, commercial and residential spaces.
Read more →Supply & Trading
Sourcing of materials, fixtures and equipment matched to your drawings and programme.
Product Design & Development
The full development cycle, from first sketch to prototype-ready files built for manufacturing.
Studio
Every service, seen for real.
Pick a discipline to see the work itself, from the first measurement to the finished result. The scenes play on their own; hover to pause.
Structural & civilRead more →
Structural & Civil Engineering
Load analysis, structural design and drawings from survey to execution, with support through approvals and construction.
Surveying & geospatialRead more →
Surveying & Geospatial
Topographic and industrial surveys, drone mapping and LiDAR with centimetre-level accuracy, delivered as point clouds, orthomosaics and CAD.
ConstructionPlan a build →
Construction
Site coordination and construction support, checking the work against the drawings so what gets built matches what was engineered.
Data analyticsAsk about reporting →
Data Analytics & Insights
We process and interpret survey and project data and deliver it as clear reports for engineers, planners and decision-makers.
Industrial part designRead more →
Industrial Part Design
Mechanical parts from rough concept to production-ready 2D and 3D drawings, with tolerances, materials and finishes specified for the workshop.
Interior architectureSee shop fitting →
Interior Architecture
Layouts, finishes and joinery for retail, commercial and residential spaces, drawn in detail and visualised in 3D before anything is built.
Supply & tradingAsk about supply →
Supply & Trading
Sourcing of materials, fixtures and equipment matched to your drawings, checked on arrival and delivered to the site programme.
Product designRead more →
Product Design & Development
The full development cycle, from first sketch to prototype-ready files, with every part designed for manufacturing from day one.
Approach
We don't hand over drawings and disappear.
The same team carries your project through every stage, so nothing gets lost between the survey and the site.
- Survey
Measure
We record the site and existing conditions on the ground or from the air.
- Design
Engineer
Analysis, concept and detailed drawings, checked against the applicable codes.
- Approvals
Sign off
Calculations and drawing packages prepared for review and approval.
- Site
Build
We support construction and fit-out on site so the result matches the design.
The Castle X mark
Two sides of one practice.
The tower stands for what we protect: your budget, your programme and the safety of what gets built. The X is where our two halves meet.
Blue sideCivil engineering, surveying, construction and data.
Gold sideIndustrial and product design, interiors, shop fitting and supply.
What you receive
Files your builders can build from.
Every project ends with a complete package. Here is what lands in your inbox, in the formats your contractors, manufacturers and planners already use.
Drawing sets
Plans, sections, elevations and details, numbered and revision-controlled.
DWGPDFA1 / A3
3D models & visuals
Coordinated models and rendered views for approvals and client sign-off.
IFCSTEPRenders
Survey reports
Topographic data, point clouds and orthomosaics with stated accuracy.
LASGeoTIFFCSV
Fabrication packages
Shop drawings, cutting lists and schedules ready for the workshop.
DXFCut listsBOM
Request a quote
Brief us in two minutes.
Answer a few questions and we turn them into a clean project brief you can send us on WhatsApp or by email. No account, no waiting.
What happens next
A short brief is all we need to come back with a scope, a timeline and a fixed fee.
- 01You send the briefOn WhatsApp or by email, with any photos or drawings you have.
- 02We call you backA 15-minute call to confirm the scope and the site.
- 03You receive a proposalScope, programme and fee, in writing.
Prefer to talk first? Use the chat assistant in the corner, or message us directly on WhatsApp.
Questions
Before you get in touch.
The things clients usually ask on the first call. Anything else, the assistant in the corner can answer right away.
Where do you work?+
We are based in London and work across the UK. Surveys and site visits are carried out by our own team; design and analysis work can be delivered remotely anywhere.
Can you take over a project that another team started?+
Yes. We review the existing drawings, survey what has been built, and pick the project up from there with a clear scope for what remains.
Do you only design, or do you also build?+
We design, engineer and then stay with the project on site: coordinating contractors and fitters, checking the work against the drawings, and supporting the team through handover.
What do I need to start a shop fitting project?+
The unit address, any existing plans or a few photos, your brand guidelines if you have them, and a target opening date. We measure the unit ourselves and take it from there.
How do fees work?+
After a short call we send a written proposal with a fixed fee for a defined scope. Larger projects are split into stages so you only commit to one stage at a time.
When can I reach you?+
Monday to Friday, 08:00 to 17:00 UK time, on WhatsApp at +44 7984 971819 or by email at info@castlex.uk. Messages outside those hours are answered the next working day.