External Works & Landscaping

The process in pictures, step by step - Step 1 of 7 - slide through the snapshots.

STEP 1

Construct the below-ground drainage

Excavate and lay the foul and surface water runs from the buildings outward, bedding pipes on granular material, setting chambers to line and invert level, and…

STEP 2

Install attenuation and SuDS features

Excavate for tanks and ponds, verify formation levels and bearing, and install cellular tanks wrapped and welded in their membranes with all connections sealed.

STEP 3

Build the roads and pavements to base course

Bring the road formation to level, lay and compact the sub-base in layers, and prove it - plate bearing or density tests per the adopting authority's…

STEP 4

Construct footpaths, drives and hard landscape

Footpaths are laid in asphalt or flags on their own compacted beds with falls to drain; block paving goes on screeded laying-course sand over a compacted…

STEP 5

Erect boundary walls, fences and street furniture

Boundary walls are built on their foundations with piers, copings and movement joints per the design; fences are set to line with posts concreted plumb.

STEP 6

Complete soft landscaping

Topsoil is respread and cultivated, levels finished to marry with paths and thresholds - with drainage falls away from every building.

STEP 7

Final surfaces, tests and adoption inspections

Surface course goes down late, when construction traffic is done with the roads.

Explore each method in depth - benefits, limitations, plant and quality control on its own page.

External Works & Landscaping: step by step

1. 1

   Step 1: Construct the below-ground drainage

   Excavate and lay the foul and surface water runs from the buildings outward, bedding pipes on granular material, setting chambers to line and invert level, and maintaining the designed falls. Test every run - air or water test witnessed and recorded - before backfilling in compacted layers. Connections to the adoptable system are made under the water company's inspection regime.

   
2. 2

   Step 2: Install attenuation and SuDS features

   Excavate for tanks and ponds, verify formation levels and bearing, and install cellular tanks wrapped and welded in their membranes with all connections sealed. Flow controls and outfalls are set precisely to level - an orifice 50 mm high is a different hydrology. Ponds and swales are formed, lined where required, and profiled to the landscaping levels.

   
3. 3

   Step 3: Build the roads and pavements to base course

   Bring the road formation to level, lay and compact the sub-base in layers, and prove it - plate bearing or density tests per the adopting authority's requirements. Kerbs and edgings are bedded and backed in concrete to string lines and level pins, with drainage crossings and service ducts installed before the carriageway closes over them. Base and binder courses are laid, rolled and checked for level and falls.

   
4. 4

   Step 4: Construct footpaths, drives and hard landscape

   Footpaths are laid in asphalt or flags on their own compacted beds with falls to drain; block paving goes on screeded laying-course sand over a compacted sub-base with edge restraints rigid - a creeping edge restraint is a spreading pavement - and is compacted with kiln-dried sand brushed into the joints, all to BS 7533 practice. Crossovers, tactile paving and dropped kerbs follow the adopting standards. Ironwork - covers and gullies - is set to finished level in mortar beds, adjusted to the surface, never left proud or sunken.

   
5. 5

   Step 5: Erect boundary walls, fences and street furniture

   Boundary walls are built on their foundations with piers, copings and movement joints per the design; fences are set to line with posts concreted plumb. Street lighting columns are erected on their bases and connected to the adopted supply. Benches, bins, bollards and cycle stores follow the layout drawing - each fixed, level and out of the pedestrian desire lines.

   
6. 6

   Step 6: Complete soft landscaping

   Topsoil is respread and cultivated, levels finished to marry with paths and thresholds - with drainage falls away from every building. Trees are pit-planted with stakes, ties and irrigation, shrubs and hedges to the planting plan, turf laid or seed sown in season. Planting too deep, in rubble, or without water is a slow-motion failure measured in dead whips next spring. In the Gulf, planting survives only with engineered irrigation - usually treated sewage effluent (TSE) where the district supplies it, since potable water for irrigation is restricted - and drought-tolerant xeriscaping is encouraged under Al Sa'fat in Dubai and Estidama in Abu Dhabi.

   
7. 7

   Step 7: Final surfaces, tests and adoption inspections

   Surface course goes down late, when construction traffic is done with the roads. Drainage is CCTV-surveyed where adoption requires it; lighting is tested; road levels and skid resistance are verified per the standard. The adopting authorities walk their systems with their checklists, and the snag list is closed out. As-builts for every buried service go into the handover file.

   

How long does External Works & Landscaping take?

Typical duration: 4–12 weeks across a housing development, phased with the plots; adoption inspections extend beyond site completion..

Related processes

• Windows, Doors & Glazing
• MEP First Fix
• Internal Finishes
• MEP Second Fix & Commissioning
• Testing, Handover & Snagging
• Site Access & Enabling Works
• Site Clearance & Demolition
• Setting Out & Survey Control
• Earthworks & Excavation
• Dewatering & Groundwater Control
• Shallow Foundations
• Piling & Deep Foundations
• Basement & Substructure
• Waterproofing and Tanking
• Concrete Frame Construction
• Steel Frame Construction
• Masonry & Timber Frame
• Floor Slabs & Screeds
• Roofing
• Façade & Cladding
• Insulation Systems
• External Works & Landscaping in Landscaping & Public Realm
• Foul and surface water drainage - method
• SuDS: attenuation and infiltration - method
• Roads, pavements and kerbs - method