Frequently Asked Questions
Singapore Office
Government Processing Fees
URA plan fees
BCA plan fees :
- New area: $400/100m2 for basement.
- New area: $300/100m2 for above ground.
- A&A works: $200/storey for residential buildings + new area (if any).
- A&A works: $400/storey for non-residential buildings + new area (if any).
SCDF plan fees :
- New area: $160/100m2
- A&A: $90/storey + new area (if any).
- Change of use: $90/storey
LTA plan (vehicle carpark) fees:
- $10/100m2, subject to minimum $120.
Nparks (external works): see attachment
Plot ratio & street block plan: Plot ratio and street block plan are unique for each site location. Please refer on URA’s master plan link.
Design Formulas
ECM design formula for estimating volume of holding pond
V = Cr x I x Site Area
Cr = Coefficient of run off = 0.65
I = Rainfall intensity = 80 mm/hr for 1 in 5 years storem for duration 1 hours
Site area = Area exposed to rain
Treatment plant capacity per hour (m3/hr) = V / 10
Drain capacity = Manning formula Qc = 1/n x AR 2/3S ½ where
Qc = discharge capacity of drain (m3/s)
N = roughness coefficient (n = 0.015 for concrete drain, UPVC = 0.0125)
A = Flow area (m2)
P = wetter perimeter
R = A/P
S = bed gradient
Allowable Total suspended solid = 50 ppm or 50mg/lit
| ECM CALCULATION – Example | ||||||||
| Calculation of soil loss/sediment yield | ||||||||
| T (Sediment yield) = | (u) (VQp)0.56 (K)(LS)(CP) | based on MUSLE equation | ||||||
| u = | 89.6 | conversion to SI unit | ||||||
| Site Area = | 4000 | m2 | ||||||
| I (rainfall intensity) = | 80 | mm/hr | 0.08 | m/hr | 1 in 5 year return period | |||
| Storm Duration = | 60 | min | 1 | hr | ||||
| V (runoff volume ) for 1Hr = | 1/360*I*Area*C*3600 | where C = | 0.65 | |||||
| = | 208 | m3 | ||||||
| Qp (Peak flow) = | V(runoff volume) | = | 0.058 | m3/s | ||||
| Duration | ||||||||
| K = | 0.04 | soil erodibility factor based on US soil erodibility Nomograph | ||||||
| %silt and very fine sand = 50% | ||||||||
| %sand = 20 % | ||||||||
| %organic matter = 0% | ||||||||
| Soil structure = 2 very fine granular | ||||||||
| Permeability = 5 (slow) | ||||||||
| LS = | 0.1 | (flat ground) | ||||||
| CP = | 1 | (without silt control) | ||||||
| T(Sediment yield) = | 1.44 | tons per storm event | ||||||
| Suspendend solid=T/V | 6934 | mg/lit | more than allowable 50 mg/l therefore need ECM control | |||||
RC structures rebar estimate
Slab = 80-110 kg/m3
RC pad floorings = 70-90 kg/m3
Transfer slab = 150 kg/m3
Pile cap/raft = 115 kg/m3
Columns = 150-450 kg/m3
Ground beams = 230 kg/m3
Beams = 220 kg/m3
Retaining walls = 110 kg/m3
Stairs = 135 kg/m3
Walls = 65 kg/m3
Heavy industrial = 125 kg/m3
Commercial = 95 kg/m3
Institutional = 85 kg/m3
Structural steel quantity
Metal roof structural roof = 30 kg/m2
ERSS/GBW requirement
- Excavation of 1.5m or less depth = insignificant building works. No need submission
- Excavation 1.5-4m depth = need submission to BCA. Need QP structure
- Excavation 4-6m depth = need submission to BCA. Need QP structure and AC structure
- Excavation> 6m = need submission to BCA. Need QP structure, QP Geo , AC struct and AC Geo
Notes: Excavation area not more than 10m2 or less and not more than 2m excavation depth = insignificant building works. No need submission to BCA
For works involving sewer pipe and other utility pipes
Pipe internal diameter less than 1m = No need submission to BCA, No need ERSS submission except for ERSS located within construction site with other building works
Pipe internal diameter 1-2m = Need submission to BCA. Need QP structure and AC structure, ERSS requirement: Need ERSS submission, QP structure required for excavation 4m or less , QP structure and AC structure required for > 4-6m excavation
Pipe internal diameter > 2m = Need submission to BCA , Need QP structure, AC struct for cut and cover, and need additional QP geo and AC geo for pipe jacking or tunneling.