Primary Contractors (estimated individual works contract values of greater than GBP 35 000 but less

Wales

45112000 - Excavating and earthmoving work

45112210 - Topsoil-stripping work

45212000 - Construction work for buildings relating to leisure, sports, culture, lodging and restaurants

45262100 - Scaffolding work

45312000 - Alarm system and antenna installation work

45343000 - Fire-prevention installation works

45340000 - Fencing, railing and safety equipment installation work

45451200 - Panelling work

45215500 - Public conveniences

45262500 - Masonry and bricklaying work

45262660 - Asbestos-removal work

45111214 - Blast-clearing work

45331000 - Heating, ventilation and air-conditioning installation work

45223500 - Reinforced-concrete structures

45261300 - Flashing and guttering work

45112200 - Soil-stripping work

45453100 - Refurbishment work

45321000 - Thermal insulation work

45213100 - Construction work for commercial buildings

45210000 - Building construction work

45451000 - Decoration work

45100000 - Site preparation work

45262330 - Concrete repair work

45315000 - Electrical installation work of heating and other electrical building-equipment

45111220 - Scrub-removal work

45317000 - Other electrical installation work

45200000 - Works for complete or part construction and civil engineering work

45313000 - Lift and escalator installation work

45324000 - Plasterboard works

45330000 - Plumbing and sanitary works

45261000 - Erection and related works of roof frames and coverings

45261420 - Waterproofing work

45262370 - Concrete-coating work

45112360 - Land rehabilitation work

45262700 - Building alteration work

45223200 - Structural works

45211200 - Sheltered housing construction work

45262000 - Special trade construction works other than roof works

45112350 - Reclamation of waste land

45333000 - Gas-fitting installation work

45211100 - Construction work for houses

45262640 - Environmental improvement works

45451100 - Ornamentation fitting work

45112100 - Trench-digging work

45314000 - Installation of telecommunications equipment

45211310 - Bathrooms construction work

45215222 - Civic centre construction work

45111210 - Blasting and associated rock-removal work

45112700 - Landscaping work

45310000 - Electrical installation work

45110000 - Building demolition and wrecking work and earthmoving work

45262670 - Metalworking

45223220 - Structural shell work

45452100 - Blast cleaning work for building exteriors

45211340 - Multi-dwelling buildings construction work

45300000 - Building installation work

45262300 - Concrete work

45111240 - Ground-drainage work

45262600 - Miscellaneous special-trade construction work

45260000 - Roof works and other special trade construction works

45261900 - Roof repair and maintenance work

45262320 - Screed works

45113000 - Siteworks

45332000 - Plumbing and drain-laying work

45343200 - Firefighting equipment installation work

45262800 - Building extension work

45111300 - Dismantling works

45211350 - Multi-functional buildings construction work

45454000 - Restructuring work

45111230 - Ground-stabilisation work

45211341 - Flats construction work

45262690 - Refurbishment of run-down buildings

45111250 - Ground investigation work

45262400 - Structural steel erection work

45261410 - Roof insulation work

45332400 - Sanitary fixture installation work

45000000 - Construction work

45312310 - Lightning-protection works

45343100 - Fireproofing work

45112310 - Infill work

45341000 - Erection of railings

45223210 - Structural steelworks

45316100 - Installation of outdoor illumination equipment

45112340 - Soil-decontamination work

45112420 - Basement excavation work

45262900 - Balcony work

45214000 - Construction work for buildings relating to education and research

45261222 - Cement roof-coating work

45212290 - Repair and maintenance work in connection with sports facilities

45261200 - Roof-covering and roof-painting work

45320000 - Insulation work

45452000 - Exterior cleaning work for buildings

45342000 - Erection of fencing

45213112 - Shop units construction work

45311000 - Electrical wiring and fitting work

45120000 - Test drilling and boring work

45111000 - Demolition, site preparation and clearance work

45262340 - Grouting work

45262360 - Cementing work

45323000 - Sound insulation work

45262210 - Foundation work

45262650 - Cladding works

45211000 - Construction work for multi-dwelling buildings and individual houses

45214400 - Construction work for university buildings

45211320 - Porches construction work

45211300 - Houses construction work

45312320 - Television aerial installation work

construction work

building construction

civil engineering

infrastructure projects

site construction

building sites

structural work

construction services

renovation work

public works

site preparation work

land clearing

excavation

site grading

demolition prep

earthworks

groundwork services

foundation prep

site leveling

preparatory works

building demolition work

wrecking work

earthmoving

building dismantling

site clearing

excavation work

demolition services

heavy earthwork

structural demolition

site preparation

demolition work

site clearance

wrecking services

debris removal

preparatory demolition

structure clearing

site decommissioning

demolition clearance

removal work

building takedown

blasting work

rock removal

explosive excavation

rock-breaking

demolition by blasting

quarry blasting

mining blasting

controlled explosion

site blasting

rock fragmentation

blast-clearing work

blast debris removal

post-blast clearance

explosion clearing

site restoration

deblasting cleanup

clearing after blasting

debris clearance

shot removal

safety clearance

scrub-removal work

vegetation clearing

underbrush removal

brush clearing

land management clearing

scrub cutting

shrub removal

woodland clearance

overgrowth removal

ground-stabilisation work

slope stabilisation

soil reinforcement

ground anchoring

geotechnical stabilisation

earth retention

soil nailing

rock bolting

retaining works

stabilising foundations

ground-drainage work

site drainage

trench drainage

dewatering

stormwater management

drainage channels

ground water control

subsoil drainage

pipe drainage

site water control

ground investigation work

geotechnical surveys

site investigation

borehole drilling

soil sampling

subsoil testing

foundation analysis

ground assessment

geotech testing

ground surveys

dismantling works

structural dismantling

deconstruction

controlled disassembly

demolition dismantling

component removal

system dismantling

technical dismantling

infrastructure decommissioning

excavating and earthmoving work

bulk earthworks

site excavation

mass excavation

grading

soil relocation

trenching

material handling

land shaping

trench‑digging work

trench excavation

utility trenching

service trench digging

pipeline trenching

cable trenching

drainage trench digging

trench installation

narrow trench excavation

subsurface trenching

soil‑stripping work

topsoil removal

site stripping

earth stripping

clearing soil layers

soil excavation

top layer removal

agricultural stripping

preparatory stripping

land surface stripping

topsoil‑stripping work

fertile layer stripping

grass topsoil excavation

vegetation layer removal

nutrient soil clearance

agricultural topsoil digging

field topsoil removal

topsoil preparation

infill work

site infill

landfill filling

land restoration

void filling

ground backfilling

reclaimed land filling

trench infilling

land reclamation

earth infill

soil-decontamination work

soil remediation

contaminated soil removal

hazardous soil cleanup

pollutant removal work

environmental decontamination

site detoxification

clean soil restoration

chemical soil cleaning

soil purification

reclamation of waste land

derelict land rehabilitation

wasteland restoration

rubbish land reclamation

brownfield development

waste site conversion

environmental land renewal

former landfill reclamation

site renewal

land rehabilitation work

site remediation

environmental restoration

contaminated land rehabilitation

brownfield restoration

soil recovery work

ground rehabilitation

ecological rehabilitation

post-industrial land recovery

land remediation

basement excavation work

cellar digging

underground construction excavation

basement pit digging

subgrade excavation

footing excavation

foundation pit work

underground dig

below-ground excavation

basement site work

landscaping work

site landscaping

terrain design

green landscaping

planting groundwork

landscape prep

earth landscaping

land contouring

landscape grading

siteworks

site development services

construction site preparation

infrastructure siteworks

earthworks support

industrial site setup

utility siteworks

site facility preparation

construction siteworks

test drilling and boring work

geotechnical drilling

subsurface testing

core drilling

exploratory drilling

site investigation drilling

exploratory boring

ground test drilling

environmental drilling

construction works

building projects

infrastructure

turnkey projects

structural construction

general contracting

building erection

new buildings

superstructure

commercial building works

residential construction

masonry

architectural building

shell construction

general building

multi‑dwelling construction

individual housing

apartment building works

residential units

housing projects

domestic buildings

low‑rise flats

clustered housing

family homes

domestic dwellings

house building

single‑family homes

detached house construction

private homes

family house projects

suburban housing

custom homes

domestic house construction

standard houseworks

single dwellings

sheltered housing

assisted living buildings

supported residences

residential care construction

communal housing projects

accessible dwelling construction

social housing structures

care home buildings

elderly housing facilities

adapted homes

houses construction work

residential house building

individual dwelling works

single-family houses construction

private housing development

detached home building

domestic house projects

standalone residences

family home construction

housing units build

bathrooms construction work

bathroom installation

washroom fitting works

shower room build projects

sanitary facility construction

restroom units construction

bath suite installation

lavatory work

bathroom refurbishment

bathroom amenities build

porches construction work

porch building

entrance porch erection

veranda construction

covered porch build

stoop and porch works

entryway canopy building

porch extension

front porch construction

external porch structures

multi-dwelling buildings construction

apartment block build

residential complex construction

flats building works

multi-unit housing construction

condominium development

block of flats construction

collective housing build

residential apartment building

housing estate build

flats construction work

flat unit build

apartment construction works

individual flat development

residential flats building

flat block construction

condominium unit build

flat complex erection

multi-flat building works

flat housing development

multi‑functional buildings

mixed‑use construction

multipurpose facility build

flexible space structures

combined‑use development

integrated building works

multifunctional facility erection

adaptable building construction

complex buildings

multifunction architecture

leisure/sports/cultural building work

hotel and restaurant build

entertainment venue construction

hospitality infrastructure

sports complex construction

lodging facility erection

cultural centre building

tourism‑related construction

hospitality venues

recreational structures

sports facility repair works

athletic venue maintenance

stadium upkeep services

sports building refurbishment

facility servicing

playing surface repair

arena maintenance

gym hall repair

field restoration works

sports infrastructure maintenance

commercial building construction

retail facility build

business premises erection

commercial complex construction

corporate real-estate build

office‑retail development

FSBO structures

shopfront buildings

business unit development

commercial property build

shop units construction

retail pod build

modular retail development

mall unit erection

high‑street unit construction

inline store build

retail kiosk build

outlet unit construction

compact retail space build

retail cell development

education building construction

research facility build

academic infrastructure building

school and university plant works

educational complex construction

knowledge centre build

educational labs and classrooms construction

research centre erection

study environment building

learning facility construction

university building construction

higher‑education campus build

academic institution structures

university halls erection

tertiary campus facility construction

higher-learning complex build

collegiate buildings

university lecture halls build

academic centre construction

campus institution build

civic centre building

community centre construction

town hall facility build

civic services venue

public assembly building

municipal civic hall

cultural civic centre

community gathering space construction

civic hub erection

civic infrastructure build

public toilet construction

restroom facility build

WC pavilion construction

public lavatory erection

sanitary block build

outdoor restroom structure

public washroom construction

convenience lavatory build

toilet block facility

public sanitation building

load-bearing system build

superstructure erection

foundation and framework works

civil structure installation

supporting frame assembly

basic structure construction

skeleton works

reinforced structure build

structural shell creation

steelwork construction

steel framing build

structural steel element erection

beam and column assembly

reinforced steel structures

load-bearing steel components

girder erection

heavy steel framework

industrial steel skeleton

civil steel infrastructure

structural shell construction

building framework erection

main concrete structure

load-bearing shell build

structural skeleton work

building core construction

reinforced shell erection

structural frame build

superstructure shell work

primary structure construction

reinforced concrete structure build

RC structure erection

concrete frame construction

reinforced concrete shell build

concrete superstructure work

RC skeleton erection

structural concrete build

concrete core construction

load-bearing concrete structure

RC building framework

roof works

roof installation

roofing repair

roofing specialist trades

skylight installation

roof insulation fitting

specialized trade works

roof structure maintenance

decorative roofing tasks

complex roofing projects

roof frame erection

roof truss installation

roofing framework build

roof structural work

roof covering support build

roof skeleton installation

round joist erection

roof frame civils

roof framework assembly

pitched roof erection

roof‑covering and painting

roof tiling

metal sheeting

slate roof works

roof coating

waterproof roof painting

roof membrane installation

bituminous covering application

painted roof finish

protective roof paint works

cement roof‑coating work

cementitious roof coating

mortar roof covering

cement-based roof membrane

reinforced cement roof layer

concrete roof sealing coat

roof render application

tiled roof cement coating

protective cement finish

structural cement roof layer

flashing and guttering work

roof flashing installation

metal flashing fabrication

eaves flashing work

chimney flashing

valley flashing

waterproof flashing works

roof-edge flashing installation

gutter fitting with flashings

roof insulation work

thermal roof insulation installation

attic insulation application

insulating membrane roof

eco‑roof insulation

loft insulation construction

roof‑deck insulation fitting

waterproof insulation layer

energy‑efficient roof insulation

waterproofing work

tanking installation

damp-proof membrane fitting

waterproof coating application

bitumen sealant work

roof sealing

wall waterproofing system

concrete waterproofing

substructure damp-proofing

water barrier installation

roof repair and maintenance

leak sealing

tile replacement

shingle repair

waterproof membrane fixing

flashing repairs

structural roof checks

roof inspection service

preventative maintenance

rooftop upkeep

special trade construction works

non-roof specialist services

decorative finishing

interior wall panel fitting

floor laying works

façade enhancements

custom carpentry

bespoke joinery works

architectural finishing

building accessories installation

scaffolding work

scaffold installation

access platform setup

temporary structure build

scaffold safety installation

mobile scaffold fitting

tower scaffold erection

industrial scaffold works

construction access system

modular scaffold assembly

foundation work

concrete base construction

piling system

substructure build

reinforced foundation laying

shallow foundation works

structural ground preparation

strip footing setup

foundation trenching

concrete work

cast-in-place concrete

mass concrete placement

concrete slab pouring

in-situ concrete construction

structural concrete works

concrete foundation building

reinforced concrete pour

concrete framing

civil concrete works

screed works

floor screeding

concrete screed laying

bonding screed installation

cement screed pour

floor leveling screed

finish screed application

self-leveling screed

underfloor heating screed

screed floor preparation

concrete repair work

structural concrete restoration

spalling repair

crack injection

concrete patching

retrofit concrete repair

restoration of deteriorated concrete

structural repair works

concrete rehabilitation

repair of concrete elements

grouting work

slurry injection

cement injection

soil stabilization injection

pressure grouting

structural crack filling

foundation grout application

void filling grouting

subterranean grout work

injection remediation

cementing work

cement application

mortar laying

concrete grout work

cement repair work

mortar bedding

cementitious filling

bonding cement installation

repair mortaring

concrete cement application

concrete-coating work

concrete sealing

protective concrete coating

surface treatment of concrete

anti‑corrosion coating

concrete waterproofing coat

concrete paint application

decorative concrete finish

concrete overlay

concrete surface treatment

structural steel erection work

steel framework installation

steel beam erection

steel column assembly

structural steel positioning

steel skeleton building

metal frame installation

structural steelwork

industrial steel erection

steel structure build

masonry and bricklaying

brick wall construction

blockwork building

stone masonry

cavity wall installation

brick veneer work

structural brickwork

decorative stonework

masonry restoration

load-bearing masonry

miscellaneous special‑trade construction work

specialised trade services

niche civil engineering tasks

unique construction specialties

environmental improvement works

ecological restoration civil works

landscape enhancement works

remediation infrastructure

habitat restoration structures

cladding works

exterior wall panels

façade cladding installation

rainscreen systems

building envelope cladding

asbestos-removal work

hazardous material abatement

asbestos stripping

friable asbestos removal

controlled demolition of asbestos

metalworking

structural metal fabrication

custom metal forming

steel component manufacture

industrial metal shop work

refurbishment of run‑down buildings

derelict building renovation

dilapidated structure restoration

building revitalisation works

urban renewal construction

building alteration

structural modification

renovation works

interior remodeling

adaptive reuse

building retrofit

change of use construction

internal restructuring

refurbishment project

building conversion

building extension

structural addition

annex construction

property enlargement

room extension

building expansion

floor addition

house extension

vertical extension

structural upgrade

balcony construction

balcony repair

balcony installation

outdoor platform works

structural balcony build

terrace extension

balcony maintenance

cantilevered balcony works

decorative balcony erection

residential balcony fitting

building installation

technical fit-out

interior system installation

service integration

construction finish works

MEP works

systems installation

building service deployment

final construction stage

interior infrastructure install

electrical installation

building wiring

electrical systems fitting

internal power grid

circuit installation

electrical infrastructure

lighting and power setup

cable routing

electrical connection works

electrical network installation

electrical wiring and fittings

power cable installation

switchboard fitting

conduit laying

lighting circuit works

domestic wiring

commercial fit-out electrics

power system wiring

internal cabling

fixture integration

alarm system installation

antenna setup

fire alarm fitting

burglar alarm installation

security system works

aerial installation

CCTV setup

receiver mounting

emergency alarm system

intrusion detection install

lightning conductor installation

surge protection systems

earthing and grounding works

lightning arrestor setup

rooftop lightning shields

electrical surge safety

strike protection installation

earthing network installation

structural bonding services

lightning safety compliance

TV antenna mounting

digital broadcast antenna setup

rooftop TV aerial

satellite signal reception

UHF/VHF antenna fitting

reception mast installation

low-noise amplifier installation

antenna alignment service

residential TV dish setup

communal TV system installation

passenger lift fitting

escalator system installation

moving walkway setup

platform lift installation

wheelchair lift fitting

lift shaft installation

escalator drive unit installation

escalator handrail setup

lift cab installation

stairlift assembly

telecommunications equipment installation

telecom systems fitting

network device installation

communication hardware setup

phone/data line integration

telecom infrastructure install

router/switch mounting

base station setup

telecom hardware fitting

electrical installation of heating systems

building heating electrics

HVAC electrical works

thermal equipment wiring

boiler electric installation

heating control circuits

plant heating electrics

building heating infrastructure

outdoor lighting installation

street lamp setup

exterior illumination fitting

outdoor lighting infrastructure

LED street lighting works

other electrical installation work

miscellaneous electrical systems installation

specialist electrical fitting

additional electrical service integration

insulation work

thermal insulation installation

energy loss reduction

heat barrier fitting

building envelope insulation

thermal insulation work

heat-retention barrier install

insulating materials fitting

temperature-control insulation

sound insulation work

acoustic barrier installation

noise-reduction paneling

soundproofing fit-out

plasterboard works

drywall installation

wall lining fitting

gypsum board assembly

partition wall construction

plumbing work

sanitary installation

pipe fitting

drainage system assembly

sanitary fixture installation

HVAC installation

heating system fit-out

ventilation duct setup

air-conditioning system installation

plumbing and drain-laying work

pipe system installation

sewer and drainage fitting

sanitary plumbing works

wastewater pipe infrastructure build

toilet/basin fitting

WC and urinal installation

bathroom fixture fit-out

sanitary ware installation

gas‑fitting installation

gas appliance fitting

domestic gas pipework installation

LPG system setup

natural gas equipment install

kitchen gas line fitting

gas safety valve installation

fence installation

railing assembly

safety barrier fitting

handrail mounting

perimeter security works

protective fencing systems

crowd-control barriers

guardrail installation services

metal fence erection

site safety enclosures

railing installation

stair rail assembly

balcony railing mounting

safety guard rails

decorative rail erection

tubular railing systems

stainless steel handrail installation

balustrade fitting

guardrail construction

custom rail frameworks

fence erection

perimeter fence setup

security fence installation

timber fence construction

chain-link fencing works

boundary fence assembly

palisade fence erection

mesh fence fitting

anti-intrusion fencing

fire‑prevention installation

smoke curtain fitting

fire door installation

flame barrier system setup

fireproofing work

passive fire protection installation

intumescent coating

fire‑resistant structure treatment

fire‑fighting equipment installation

fire extinguishing system fit-out

hose reel installation

fire hose cabinet mount

decoration work

decorative painting

ornamental finishing

aesthetic surface treatment

decorative interior work

ornamentation fitting

architectural feature installation

decorative trim fitting

ornamental element assembly

panelling work

wall panel installation

timber or plastic panel fitting

interior wall surfacing

panel boarding

exterior building cleaning

facade wash

pressure washing structure

building surface cleaning

outdoor cleaning works

blast cleaning exterior

sandblasting buildings

abrasive surface cleaning

high-pressure blast washing

building façade restoration

refurbishment work

building overhaul

interior/exterior renewal

cosmetic renovation

structural refurbishment

restructuring work

building reconfiguration

adaptive reuse construction

layout change works

structural modification project