Factor which increases the GFR are all except:
Factors affecting the glomerular filtration rate:

Changes in renal blood flow.
Changes in glomerular capillary hydrostatic pressure.
Changes in systemic blood pressure.
Afferent or efferent arteriolar constriction.
Changes in hydrostatic pressure in Bowman’s capsule.
Ureteral obstruction. 
Edema of kidney inside tight renal capsule.
Changes in concentration of plasma: dehydration, hypoprotinemia, etc (minor factors).
Changes in K+
Changes in glomerular capillary permeability.
Changes in effective filtration surface area.

Key Concept
Decrease in tubular hydrostatic pressure increases the GFR.
Reference: Ganong’s Review of Medical Physiology T W E N T Y - F I F T H   E D I T I O N page no 679
Increase in glomerular hydrostatic pressure
Increase in tubular hydrostatic pressure
Efferent arteriolar constriction
Decrease in plasma oncotic pressure