17 services · Sussex & Surrey
Residential
Extensions, conversions and whole-home projects for homeowners, with site visits across West Sussex, East Sussex and Surrey.
Extensions
Measured Building Survey Services
Accurate Existing Plans and Elevations to Design From. Sussex, Surrey and UK-Wide.
Why Clients Trust ArchEvolve With Measured Building Surveys
Every drawing that follows is only as accurate as the survey underneath it. ArchEvolve is MCIAT-chartered and measures, models and checks the existing building personally, so design, planning and construction drawings start from dimensions you can rely on.
- 15 years of experience
- 350 planning approvals secured
- 500 projects completed
- Revit 3D modelling as standard
- MCIAT-chartered accreditation
Our services
Surveys as the Base for Design
A measured survey is the starting point for accurate planning drawings and Building Regulations drawings. It is especially valuable for house extensions, flat conversions and older buildings where no reliable plans exist.
20 services · Nationwide
Developers & Commercial
Planning and technical design for developers and commercial clients across England.
Developer services
Site & feasibility
15 services · Homeowners and developers
Planning & Drawings
From the first feasibility check to construction drawings, in the order a project needs them.
01Feasibility & survey
02Planning
03Technical & construction
Measured Building Survey Services: The Base for Every Design
Measured building survey services record the existing building as it really is: room sizes, wall thicknesses, window and door positions, floor and ceiling levels and roof heights. We measure on site, build an accurate existing model in Revit and produce existing floor plans, elevations and sections. Every proposal we draw afterwards sits on that model, so extensions, conversions and alterations fit the building first time.
Common challenges
- Original drawings that no longer match the building
- Walls that are not square, plumb or a consistent thickness
- Changes in floor level hidden between older and newer parts
- Proposed designs that clash with existing windows and openings
- Builders quoting from guesswork rather than accurate dimensions
- Period buildings with irregular, hand-built details
How ArchEvolve solves them
- Fresh measurements taken on site, room by room
- Real wall positions and thicknesses recorded, not idealised
- Floor, ceiling and threshold levels captured throughout
- Existing openings modelled so proposals align with them
- Dimensioned existing drawings issued to builders and engineers
- Irregular historic fabric recorded carefully for heritage work
How an ArchEvolve Project Works
A measured survey follows seven steps, from booking the visit to issuing existing drawings that the whole project team can work from.
Scope and Access
We confirm which floors, elevations and outbuildings need surveying and arrange a convenient time for access to every room, loft and garden.
On-Site Measurement
We measure each room, wall, opening and level on site, taking photographs and notes so nothing has to be guessed back at the desk.
External Elevations
We record the outside of the building, including window and door positions, eaves and ridge heights, chimneys and the relationship to boundaries.
Revit Existing Model
We build an accurate 3D model of the existing building in Revit, which becomes the base for every later design and drawing.
Cross-Checking
Running dimensions, diagonals and levels are cross-checked within the model, and any doubts are resolved, with a return visit if needed, before drawings are issued.
Existing Drawings Issued
You receive existing floor plans, elevations, sections and a roof plan as PDFs, at the scales needed for planning and construction.
Ready for Design
The survey model moves straight into concept design, so proposals for your extension, conversion or refurbishment start from the building as built.
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Areas we cover
Measured Surveys Across Sussex and Surrey
Residential projects across West Sussex, East Sussex and Surrey, with site visits and local planning knowledge. Developer and commercial projects are delivered across England.
3Counties
14Towns
UKDevelopers
West Sussex11 towns
Developer or commercial project outside Sussex?
We work across England →Surveys Built as a 3D Model, Not Just a Floor Plan
A 2D survey records each drawing separately, so plans and elevations can disagree. ArchEvolve records the building as one Revit model, so every plan, elevation and section is cut from the same accurate geometry.
Survey Becomes Model
The existing building is modelled in Revit, so the survey is not a flat record but a 3D base you can see rendered in Enscape alongside the proposals.
No Redrawing Later
Because design starts on the survey model, there is no second round of tracing or redrawing, which saves time and removes a common source of error.
Local Building Knowledge
ArchEvolve surveys homes and commercial buildings across West Sussex, East Sussex and Surrey, from period properties to modern houses and converted commercial units.
Surveyed by the Designer
Alex Page carries out the survey himself and then designs the project, so the person who measured the building is the one drawing the proposals.
Measured Building Surveys Across Sussex and Surrey
ArchEvolve carries out measured building surveys for homeowners and businesses across West Sussex, East Sussex and Surrey. For developer projects elsewhere in the UK, we agree the survey approach for each site.
What is included in your measured building survey services?
The survey records every room, wall, opening, level and external elevation of the building. We then issue existing floor plans, elevations, sections and a roof plan, all cut from a single Revit model that becomes the base for your design.
Why do I need a measured survey if I already have the original plans?
Original plans rarely match the building as it stands. Walls move during construction, earlier owners alter layouts and older drawings are often schematic. Designing from inaccurate plans leads to proposals that do not fit, so we always measure the building as it is today.
What is the difference between a measured survey and a topographical survey?
A measured survey records the building itself. A topographical survey records the land: levels, boundaries, trees and services, usually carried out by a specialist land surveyor. Sloping plots, self-build sites and new builds often need both, and we coordinate the two.
Is a measured survey the same as a structural or condition survey?
No. A measured survey records dimensions and layout for design. A building survey by a chartered surveyor assesses condition and defects, and a structural engineer assesses structure. Many projects need a measured survey plus one of these, and we can advise which.
Do I need a measured survey for a planning application?
Most applications require existing and proposed plans and elevations, so an accurate record of the existing building is essential. The survey model feeds directly into our planning drawings, so existing and proposed drawings always match.
How long does a measured survey take on site?
Most houses can be measured in a single visit, while larger, older or more complex buildings may need longer. We confirm the expected time when we arrange access, and the drawings follow once the model has been built and cross-checked.
Can you survey listed or period buildings?
Yes. Older buildings have irregular walls, uneven floors and hand-built details, so they need extra care to record accurately. A careful survey is the starting point for any listed building design work, where the council will expect the existing fabric to be properly understood.
Can my builder and engineer use the survey drawings?
Yes. The existing drawings are dimensioned and issued as PDFs for your builder, structural engineer or other consultants. When the project moves forward, the same model is developed into construction drawings, so everyone works from the same base.
Frequently Asked Questions
Book Your Measured Building Survey Today
Free initial consultation for homeowners and businesses in Sussex and Surrey. Tell us about the building and what you plan to do.
