| Maryland Assessment Manual
Computer Assisted Mass Appraisal State Department of Assessments and Taxation |
|
|---|---|
| CAMA Table of Contents | SDAT Home |
EXAMPLE
SQUARE FOOT RATE CALCULATION VIA FORMULA
Reference Section 2 of the preceding property worksheet. Note that Section 1 of the Dwelling is a 2 story with basement frame (siding) building of 672 square feet and that Section 2 of the Dwelling is a 1 story no basement frame (siding) section of 264 square feet.
In the Administrative data area of the worksheet, one may note that the structure is a grade 4 quality of construction, that the perimeter of section one is 104 lineal feet, that the total perimeter is 148 lineal feet and that the total foundation square footage is 936 square feet.
The following calculation of the square foot rates would occur using the above information and the square foot rates tables and other charge rate table for grade 4 residences:
Section 1 - 2 story with basement grade 4 frame structure
| Building Constant Rate |
$24,076.00
|
Square Foot Rate of $83.79 times Square Foot Size for Section 1 of 672 Square Feet equals |
$56,306.88 |
Frame (siding) Perimeter Rate of $241.99 times Perimeter of Section 1 of 104 Lineal Feet equals |
$25,166.96 |
Total of All Square Foot Rate Components for Section 1 |
$105,549.84 |
Foundation Square Feet of Section 1 |
672 |
Square Foot Rate for Section 1 is Total Square Foot Rate Components Divided by the Foundation Square Feet (105,549.84 ÷ 672 square feet) equals |
$157.07 |
This Square Foot rate appears in the rate column in Section 2 of the preceding property worksheet for Section 1.
The Base Building Value for Section 1 of the Dwelling in Section 2 of the worksheet is:
| Sec. | Story | Type | Square Feet | Rate | Cost |
| 1 | 2 Story with Basement | Siding | 672 | 157.07 | $105,549 |
CAMA - I - 4 Revised 12/01
SQUARE FOOT RATE CALCULATION VIA FORMULA (continued)
Section 2 - 1 story, no basement grade 4 frame structure
| Building Constant Rate |
$19,249.00
|
|
Square Foot Rate of $44.53 times Square Foot Size for Total Foundation of 936 Square Feet equals |
$41,680.08 |
|
Frame Perimeter Rate of $130.93 times Total Perimeter of 148 Lineal Feet equals |
$19,377.64 |
|
Total of All Square Foot Rate Components for Section 2 |
$80,306.72 |
| Total Foundation Square Feet |
936 |
|
Square Foot Rate for Section 2 is Total Square Foot Rate Components Divided by the Total Foundation Square Feet ($80,306.72 ÷ 936 square feet) equals |
$85.80 |
This Square Foot rate appears in the rate column in Section 2 of the preceding property worksheet for Section 2. This rate is multiplied by the actual square footage of Section 2 to produce the base building value for Section 2.
The Base Building Value for Section 2 of the Dwelling in Section 2 of the worksheet is:
| Sec. | Story | Type | Square Feet | Rate | Cost |
| 2 | 1 Story No Basement | Siding | 264 | 85.80 | $22,650 |
Other Charges for deviations not included in square foot cost rates are itemized in Section 4 of the preceding worksheet. These are computed using the other charge rate for grade 4 structures from the other charge rate table. A summary of these are listed below:
4. OTHER CHARGES
|
ITEM
|
SIZE/UNIT
|
RATE
|
COST
|
| Roof - Composition Shingle | |||
| Heat - Heat Pump | |||
| Baths (over allowance) |
1
|
2,838.00
|
2,838
|
| Club Room |
200
|
21.41
|
4,282
|
| A/C - Combined System |
1,608
|
1.74
|
2,797
|
| Half Baths |
1
|
1,309.00
|
1,309
|
| Fireplace - 1 Story Brick |
1
|
3,689.00
|
3,689
|
| Porch - 1 Story Open |
60
|
28.12
|
1,687
|
| Concrete Patio |
120
|
2.25
|
270
|
| Frame Garage |
484
|
24.25
|
11,737
|
5. SUBTOTAL: OTHER CHARGES 28,610
CAMA-I-5 Revised 12/01
SQUARE FOOT RATE CALCULATION VIA FORMULA (continued)
The Cost Tables that follow are for manually developing square foot cost rates. Following the Square Foot Cost Tables are Other Charge Cost Tables which are used for valuing items not included in the Square Foot Rates.
The Square Foot Rate for Section 2 of the residential worksheet is multiplied by the applicable size to produce a current cost for Section 2. The sum of the costs for all sections and the total of all Other Charges is the total current replacement cost new of the dwelling. In subsequent valuations of the property via Computer Assisted Mass Appraisal the 2000 building costs will be indexed to produce a current cost of construction.
Note: Square foot rate formula deviations are made in the following areas:
CAMA - I - 6 Revised 12/01