18.4.8.030 Solar Setbacks | Ashland Land Use Ordinance

A. Setback Standard A. This setback is designed to ensure that shadows are no greater than six feet at the north property line. Buildings on lots which are classified as standard A, pursuant to subsection 18.4.8.020.A.1, shall be set back from the northern lot line according to the following formula.

SSB = (H - 6') / (0.445 + S)

Where:

SSB = the minimum distance in feet that the tallest shadow producing point which creates the longest shadow onto the northerly property must be set back from the northern property line. See definition of northern property line in part 18.6.

H = the height in feet of the highest shade producing point of the structure which casts the longest shadow beyond the northern property line. See definition of highest shade producing point in part 18.6.

S = the slope of the lot, as defined in this chapter.

Table 18.4.8.030.A. Setback Standard “A”
Height in feet	Slope
Height in feet	-0.30	-0.25	-0.20	-0.15	-0.10	-0.05	-0.00	0.05	0.10	0.15
8 *	14	10	8	7	6	5	4	4	4	3
10 *	28	20	16	14	12	10	9	8	7	7
12 *	41	31	24	20	17	15	13	12	11	10
14 *	55	41	33	27	23	20	18	16	15	13
16 *	69	51	41	34	29	25	22	20	18	17
18 *	83	61	49	41	35	30	27	24	22	20
20 *	96	72	57	47	41	35	31	28	26	24
22 *	110	82	65	54	46	40	36	32	29	27
24 *	124	92	73	61	52	46	40	36	33	30
26 *	138	102	82	68	58	51	45	40	37	34
28 *	151	113	90	75	64	56	49	44	40	37
30 *	165	123	98	81	70	61	54	48	44	40
32 *	179	133	106	88	75	66	58	53	48	44
34 *	193	143	114	95	81	71	63	57	51	47
36 *	207	154	122	102	87	76	67	61	55	50
38 *	220	164	130	108	93	81	72	65	59	54
40 *	234	174	139	115	98	86	76	69	62	57

B. Setback Standard B. This setback is designed to ensure that shadows are no greater than 16 feet at the north property line. Buildings for lots which are classified as standard B, pursuant to subsection 18.4.8.020.A.2, shall be set back from the northern lot line as set forth in the following formula:

SSB = (H - 16') / (0.445 + S)

Table 18.4.8.030.B. Setback Standard “B”
Height in feet	Slope
Height in feet	-0.30	-0.25	-0.20	-0.15	-0.10	-0.05	0.00	0.05	0.10	0.15
8 *	0	0	0	0	0	0	0	0	0	0
10 *	0	0	0	0	0	0	0	0	0	0
12 *	0	0	0	0	0	0	0	0	0	0
14 *	0	0	0	0	0	0	0	0	0	0
16 *	0	0	0	0	0	0	0	0	0	0
18 *	14	10	8	7	8	5	4	4	4	3
20 *	28	20	16	14	12	10	9	8	7	7
22 *	41	31	24	20	17	15	13	12	11	10
24 *	55	41	33	27	23	20	18	16	15	13
26 *	69	51	54	34	29	25	22	20	18	17
28 *	83	61	49	41	35	30	27	24	22	20
30 *	96	72	57	47	41	35	31	28	26	24
32 *	110	82	65	54	46	40	36	35	29	27
34 *	124	92	73	61	52	46	40	36	33	30
36 *	138	102	82	68	58	51	45	40	37	34
38 *	151	113	90	75	64	56	49	44	40	37
40 *	165	123	98	81	70	61	54	48	44	40

C. Setback Standard C. This setback is designed to ensure that shadows are no greater than 21 feet at the north property line. Buildings on lots which are classified as standard C, pursuant to subsection 18.4.8.020.A.3, shall be set back from the northern lot line according to the following formula:

SSB = (H - 21') / (0.445 + S)

Table 18.4.8.030.C. Setback Standard “C”
Height in feet	Slope
Height in feet	-0.30	-0.25	-0.20	-0.15	-0.10	-0.05	0.00	0.05	0.10	0.15
8 *	0	0	0	0	0	0	0	0	0	0
10 *	0	0	0	0	0	0	0	0	0	0
12 *	0	0	0	0	0	0	0	0	0	0
14 *	0	0	0	0	0	0	0	0	0	0
16 *	0	0	0	0	0	0	0	0	0	0
18 *	0	0	0	0	0	0	0	0	0	0
20 *	0	0	0	0	0	0	0	0	0	0
22 *	7	5	4	3	3	3	2	2	2	2
24 *	21	15	12	10	9	8	7	6	6	6
26 *	34	26	20	17	14	13	11	10	9	8
28 *	48	36	29	24	20	18	16	14	13	12
30 *	62	46	37	30	26	23	20	18	17	15
32 *	76	56	45	37	32	28	25	22	20	18
34 *	90	67	53	44	38	33	29	26	24	22
36 *	103	77	61	51	43	38	34	30	28	25
38 *	117	87	69	58	49	43	38	34	31	29
40 *	131	97	77	64	55	48	43	38	35	32